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Huang R, Di N, Xi B, Yang J, Duan J, Li X, Feng J, Choat B, Tissue D. Herb hydraulics: Variation and correlation for traits governing drought tolerance and efficiency of water transport. Sci Total Environ 2024; 907:168095. [PMID: 37879470 DOI: 10.1016/j.scitotenv.2023.168095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/20/2023] [Accepted: 10/22/2023] [Indexed: 10/27/2023]
Abstract
Hydraulic traits dictate plant response to drought, thus enabling better understanding of community dynamics under global climate change. Despite being intensively documented in woody species, herbaceous species (graminoids and forbs) are largely understudied, hence the distribution and correlation of hydraulic traits in herbaceous species remains unclear. Here, we collected key hydraulic traits for 436 herbaceous species from published literature, including leaf hydraulic conductivity (Kleaf), water potential inducing 50 % loss of hydraulic conductivity (P50), stomatal closure (Pclose) and turgor loss (Ptlp). Trait variation of herbs was analyzed and contrasted with angiosperm woody species within the existing global hydraulic traits database, as well as between different growth forms within herbs. Furthermore, hydraulic traits coordination was also assessed for herbaceous species. We found that herbs showed overall more negative Pclose but less negative Ptlp compared with angiosperm woody species, while P50 did not differ between functional types, regardless of the organ (leaf and stem). In addition, correlations were found between Kleaf and P50 of leaf (P50leaf), as well as between Pclose, P50leaf and Kleaf. Within herbs, graminoids generally exhibited more negative P50 and Ptlp, but lower Kleaf, relative to forbs. Within herbs, no clear pattern regarding hydraulic traits-climate relationship was found. Our analysis provided insights into herb hydraulic, and highlighted the knowledge gaps need to be filled regarding the response of herbs to drought.
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Affiliation(s)
- Ruike Huang
- College of Life and Environmental Science, Minzu University of China, Zhongguancun Campus, 27 Zhongguancun south Avenue, Beijing 100081, People's Republic of China; Collaborative Innovation Center for Grassland Ecological Security (Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region), Hohhot 010020, People's Republic of China
| | - Nan Di
- Collaborative Innovation Center for Grassland Ecological Security (Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region), Hohhot 010020, People's Republic of China; School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Benye Xi
- Ministry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, 35 Qinghua East Rd, Beijing 100083, People's Republic of China
| | - Jinyan Yang
- CSIRO Land and Water, Black Mountain, Australian Capital Territory 2601, Australia
| | - Jie Duan
- Ministry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, 35 Qinghua East Rd, Beijing 100083, People's Republic of China.
| | - Ximeng Li
- College of Life and Environmental Science, Minzu University of China, Zhongguancun Campus, 27 Zhongguancun south Avenue, Beijing 100081, People's Republic of China.
| | - Jinchao Feng
- College of Life and Environmental Science, Minzu University of China, Zhongguancun Campus, 27 Zhongguancun south Avenue, Beijing 100081, People's Republic of China
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
| | - David Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia; Global Centre for Land-Based Innovation, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
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2
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Smith-Martin CM, Muscarella R, Hammond WM, Jansen S, Brodribb TJ, Choat B, Johnson DM, Vargas-G G, Uriarte M. Hydraulic variability of tropical forests is largely independent of water availability. Ecol Lett 2023; 26:1829-1839. [PMID: 37807917 DOI: 10.1111/ele.14314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 07/06/2023] [Accepted: 08/08/2023] [Indexed: 10/10/2023]
Abstract
Tropical rainforest woody plants have been thought to have uniformly low resistance to hydraulic failure and to function near the edge of their hydraulic safety margin (HSM), making these ecosystems vulnerable to drought; however, this may not be the case. Using data collected at 30 tropical forest sites for three key traits associated with drought tolerance, we show that site-level hydraulic diversity of leaf turgor loss point, resistance to embolism (P50 ), and HSMs is high across tropical forests and largely independent of water availability. Species with high HSMs (>1 MPa) and low P50 values (< -2 MPa) are common across the wet and dry tropics. This high site-level hydraulic diversity, largely decoupled from water stress, could influence which species are favoured and become dominant under a drying climate. High hydraulic diversity could also make these ecosystems more resilient to variable rainfall regimes.
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Affiliation(s)
- Chris M Smith-Martin
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, Minnesota, USA
- Department of Ecology Evolution and Environmental Biology, Columbia University, New York City, New York, USA
| | - Robert Muscarella
- Plant Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - William M Hammond
- Agronomy Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida, USA
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, Germany
| | - Timothy J Brodribb
- School of Biological Sciences, University of Tasmania, Hobart, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Daniel M Johnson
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, USA
| | - German Vargas-G
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, USA
| | - María Uriarte
- Department of Ecology Evolution and Environmental Biology, Columbia University, New York City, New York, USA
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3
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Losso A, Gauthey A, Choat B, Mayr S. Seasonal variation in the xylem sap composition of six Australian trees and shrubs. AoB Plants 2023; 15:plad064. [PMID: 37899974 PMCID: PMC10601387 DOI: 10.1093/aobpla/plad064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 09/11/2023] [Indexed: 10/31/2023]
Abstract
In recent years, xylem sap composition has been shown to affect xylem hydraulics. However, information on how much xylem sap composition can vary across seasons and specifically under drought stress is still limited. We measured xylem sap chemical composition ([Ca2+], [K+], [Na+], electrical conductivity EC and pH) and surface tension (γ) of six Australian angiosperm trees and shrubs over 1 year, which comprised of exceptional dry and wet periods. Percentage losses of hydraulic conductivity and predawn leaf water potential were also monitored. In all species, measured parameters changed considerably over the annual time course. Ions and pH tended to decrease during winter months whereas γ showed a slight increase. No clear correlation was found between sap and hydraulic parameters, except for pH that was higher when plants suffered higher drought stress levels. Results indicate xylem sap composition to be complex and dynamic, where most variation in its composition seems to be dictated by season, even under severe dry conditions. However, pH might play a role as signals of drought stress.
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Affiliation(s)
- Adriano Losso
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797 Penrith, 2751 New South Wales, Australia
- Department of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
| | - Alice Gauthey
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797 Penrith, 2751 New South Wales, Australia
- Plant Ecology Research Laboratory PERL, Ecole Polytechnique Fédérale de Lausanne EPFL, 1015 Lausanne, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797 Penrith, 2751 New South Wales, Australia
| | - Stefan Mayr
- Department of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
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4
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Ruffault J, Limousin JM, Pimont F, Dupuy JL, De Càceres M, Cochard H, Mouillot F, Blackman CJ, Torres-Ruiz JM, Parsons RA, Moreno M, Delzon S, Jansen S, Olioso A, Choat B, Martin-StPaul N. Plant hydraulic modelling of leaf and canopy fuel moisture content reveals increasing vulnerability of a Mediterranean forest to wildfires under extreme drought. New Phytol 2023; 237:1256-1269. [PMID: 36366950 DOI: 10.1111/nph.18614] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Fuel moisture content (FMC) is a crucial driver of forest fires in many regions world-wide. Yet, the dynamics of FMC in forest canopies as well as their physiological and environmental determinants remain poorly understood, especially under extreme drought. We embedded a FMC module in the trait-based, plant-hydraulic SurEau-Ecos model to provide innovative process-based predictions of leaf live fuel moisture content (LFMC) and canopy fuel moisture content (CFMC) based on leaf water potential ( ψ Leaf ). SurEau-Ecos-FMC relies on pressure-volume (p-v) curves to simulate LFMC and vulnerability curves to cavitation to simulate foliage mortality. SurEau-Ecos-FMC accurately reproduced ψ Leaf and LFMC dynamics as well as the occurrence of foliage mortality in a Mediterranean Quercus ilex forest. Several traits related to water use (leaf area index, available soil water, and transpiration regulation), vulnerability to cavitation, and p-v curves (full turgor osmotic potential) had the greatest influence on LFMC and CFMC dynamics. As the climate gets drier, our results showed that drought-induced foliage mortality is expected to increase, thereby significantly decreasing CFMC. Our results represent an important advance in our capacity to understand and predict the sensitivity of forests to wildfires.
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Affiliation(s)
| | | | | | | | | | - Hervé Cochard
- Université Clermont-Auvergne, INRAE, PIAF, 63000, Clermont-Ferrand, France
| | - Florent Mouillot
- CEFE, Univ Montpellier, CNRS, EPHE, IRD, 34000, Montpellier, France
| | - Chris J Blackman
- School of Biological Sciences, University of Tasmania, Hobart, Tas., 7001, Australia
| | - José M Torres-Ruiz
- Université Clermont-Auvergne, INRAE, PIAF, 63000, Clermont-Ferrand, France
| | - Russell A Parsons
- Fire Sciences Laboratory, Rocky Mountain Research Station, USDA Forest Service, Missoula, MT, 59808, USA
| | | | | | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, D-89081, Ulm, Germany
| | | | - Brendan Choat
- Western Sydney University, Penrith, NSW, 2751, Australia
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5
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Griebel A, Boer MM, Blackman C, Choat B, Ellsworth DS, Madden P, Medlyn B, Resco de Dios V, Wujeska‐Klause A, Yebra M, Younes Cardenas N, Nolan RH. Specific leaf area and vapour pressure deficit control live fuel moisture content. Funct Ecol 2023. [DOI: 10.1111/1365-2435.14271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Anne Griebel
- Hawkesbury Institute for the Environment Western Sydney University Penrith Australia
- NSW Bushfire Risk Management Research Hub Wollongong Australia
| | - Matthias M. Boer
- Hawkesbury Institute for the Environment Western Sydney University Penrith Australia
- NSW Bushfire Risk Management Research Hub Wollongong Australia
| | - Chris Blackman
- School of Biological Science University of Tasmania Hobart Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment Western Sydney University Penrith Australia
| | - David S. Ellsworth
- Hawkesbury Institute for the Environment Western Sydney University Penrith Australia
| | - Paul Madden
- Hawkesbury Institute for the Environment Western Sydney University Penrith Australia
| | - Belinda Medlyn
- Hawkesbury Institute for the Environment Western Sydney University Penrith Australia
| | - Víctor Resco de Dios
- Joint Research Unit CTFC - AGROTECNIO - CERCA Center Lleida Spain
- Department of Crop and Forest Sciences, Universitat de Lleida Lleida Spain
| | | | - Marta Yebra
- Fenner School of Environment & Society Australian National University Canberra Australia
- School of Engineering Australian National University Canberra Australia
| | | | - Rachael H. Nolan
- Hawkesbury Institute for the Environment Western Sydney University Penrith Australia
- NSW Bushfire Risk Management Research Hub Wollongong Australia
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6
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Li X, Xi B, Wu X, Choat B, Feng J, Jiang M, Tissue D. Corrigendum: Unlocking drought-induced tree mortality: Physiological mechanisms to modelling. Front Plant Sci 2023; 13:1126049. [PMID: 36699856 PMCID: PMC9869915 DOI: 10.3389/fpls.2022.1126049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
[This corrects the article DOI: 10.3389/fpls.2022.835921.].
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Affiliation(s)
- Ximeng Li
- College of Life and Environmental Science, Minzu University of China, Beijing, China
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Benye Xi
- Ministry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing, China
| | - Xiuchen Wu
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Jinchao Feng
- College of Life and Environmental Science, Minzu University of China, Beijing, China
| | - Mingkai Jiang
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - David Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- Global Centre for Land-based Innovation, Western Sydney University, Richmond, NSW, Australia
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7
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Losso A, Challis A, Gauthey A, Nolan RH, Hislop S, Roff A, Boer MM, Jiang M, Medlyn BE, Choat B. Canopy dieback and recovery in Australian native forests following extreme drought. Sci Rep 2022; 12:21608. [PMID: 36517498 PMCID: PMC9751299 DOI: 10.1038/s41598-022-24833-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 11/21/2022] [Indexed: 12/15/2022] Open
Abstract
In 2019, south-eastern Australia experienced its driest and hottest year on record, resulting in massive canopy dieback events in eucalypt dominated forests. A subsequent period of high precipitation in 2020 provided a rare opportunity to quantify the impacts of extreme drought and consequent recovery. We quantified canopy health and hydraulic impairment (native percent loss of hydraulic conductivity, PLC) of 18 native tree species growing at 15 sites that were heavily impacted by the drought both during and 8-10 months after the drought. Most species exhibited high PLC during drought (PLC:65.1 ± 3.3%), with no clear patterns across sites or species. Heavily impaired trees (PLC > 70%) showed extensive canopy browning. In the post-drought period, most surviving trees exhibited hydraulic recovery (PLC:26.1 ± 5.1%), although PLC remained high in some trees (50-70%). Regained hydraulic function (PLC < 50%) corresponded to decreased canopy browning indicating improved tree health. Similar drought (37.1 ± 4.2%) and post-drought (35.1 ± 4.4%) percentages of basal area with dead canopy suggested that trees with severely compromised canopies immediately after drought were not able to recover. This dataset provides insights into the impacts of severe natural drought on the health of mature trees, where hydraulic failure is a major contributor in canopy dieback and tree mortality during extreme drought events.
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Affiliation(s)
- Adriano Losso
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.
- Department of Botany, University of Innsbruck, Sternwartestraße 15, 6020, Innsbruck, Austria.
| | - Anthea Challis
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Alice Gauthey
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- Plant Ecology Research Laboratory PERL, Ecole Polytechnique Fédérale de Lausanne EPFL, 1015, Lausanne, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903, Birmensdorf, Switzerland
| | - Rachael H Nolan
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- NSW Bushfire Risk Management Research Hub, Wollongong, NSW, Australia
| | - Samuel Hislop
- Forest Science, NSW Department of Primary Industries, Parramatta, NSW, 2150, Australia
| | - Adam Roff
- Department of Planning, Industry and Environment, Remote Sensing and Landscape Science, 26 Honeysuckle Drive, Newcastle, NSW, 2302, Australia
| | - Matthias M Boer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- NSW Bushfire Risk Management Research Hub, Wollongong, NSW, Australia
| | - Mingkai Jiang
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- College of Life Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou, Zhejiang, China
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.
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8
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Pritzkow C, Brown MJM, Carins-Murphy MR, Bourbia I, Mitchell PJ, Brodersen C, Choat B, Brodribb TJ. Conduit position and connectivity affect the likelihood of xylem embolism during natural drought in evergreen woodland species. Ann Bot 2022; 130:431-444. [PMID: 35420657 PMCID: PMC9486930 DOI: 10.1093/aob/mcac053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND AND AIMS Hydraulic failure is considered a main cause of drought-induced forest mortality. Yet, we have a limited understanding of how the varying intensities and long time scales of natural droughts induce and propagate embolism within the xylem. METHODS X-ray computed tomography (microCT) images were obtained from different aged branch xylem to study the number, size and spatial distribution of in situ embolized conduits among three dominant tree species growing in a woodland community. KEY RESULTS Among the three studied tree species, those with a higher xylem vulnerability to embolism (higher water potential at 50 % loss of hydraulic conductance; P50) were more embolized than species with lower P50. Within individual stems, the probability of embolism was independent of conduit diameter but associated with conduit position. Rather than the occurrence of random or radial embolism, we observed circumferential clustering of high and low embolism density, suggesting that embolism spreads preferentially among conduits of the same age. Older xylem also appeared more likely to accumulate embolisms than young xylem, but there was no pattern suggesting that branch tips were more vulnerable to cavitation than basal regions. CONCLUSIONS The spatial analysis of embolism occurrence in field-grown trees suggests that embolism under natural drought probably propagates by air spreading from embolized into neighbouring conduits in a circumferential pattern. This pattern offers the possibility to understand the temporal aspects of embolism occurrence by examining stem cross-sections.
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Affiliation(s)
- Carola Pritzkow
- School of Biology, University of Tasmania, Hobart, TAS, 7005, Australia
| | - Matilda J M Brown
- School of Biology, University of Tasmania, Hobart, TAS, 7005, Australia
| | | | - Ibrahim Bourbia
- School of Biology, University of Tasmania, Hobart, TAS, 7005, Australia
| | | | - Craig Brodersen
- School of the Environment, Yale University, New Haven, CT 06511, USA
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
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9
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De Kauwe MG, Sabot MEB, Medlyn BE, Pitman AJ, Meir P, Cernusak LA, Gallagher RV, Ukkola AM, Rifai SW, Choat B. Towards species-level forecasts of drought-induced tree mortality risk. New Phytol 2022; 235:94-110. [PMID: 35363880 PMCID: PMC9321630 DOI: 10.1111/nph.18129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/28/2022] [Indexed: 05/14/2023]
Abstract
Predicting species-level responses to drought at the landscape scale is critical to reducing uncertainty in future terrestrial carbon and water cycle projections. We embedded a stomatal optimisation model in the Community Atmosphere Biosphere Land Exchange (CABLE) land surface model and parameterised the model for 15 canopy dominant eucalypt tree species across South-Eastern Australia (mean annual precipitation range: 344-1424 mm yr-1 ). We conducted three experiments: applying CABLE to the 2017-2019 drought; a 20% drier drought; and a 20% drier drought with a doubling of atmospheric carbon dioxide (CO2 ). The severity of the drought was highlighted as for at least 25% of their distribution ranges, 60% of species experienced leaf water potentials beyond the water potential at which 50% of hydraulic conductivity is lost due to embolism. We identified areas of severe hydraulic stress within-species' ranges, but we also pinpointed resilience in species found in predominantly semiarid areas. The importance of the role of CO2 in ameliorating drought stress was consistent across species. Our results represent an important advance in our capacity to forecast the resilience of individual tree species, providing an evidence base for decision-making around the resilience of restoration plantings or net-zero emission strategies.
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Affiliation(s)
| | - Manon E. B. Sabot
- ARC Centre of Excellence for Climate ExtremesSydneyNSW2052Australia
- Climate Change Research CentreUniversity of New South WalesSydneyNSW2052Australia
| | - Belinda E. Medlyn
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityLocked Bag 1797PenrithNSW2751Australia
| | - Andrew J. Pitman
- ARC Centre of Excellence for Climate ExtremesSydneyNSW2052Australia
- Climate Change Research CentreUniversity of New South WalesSydneyNSW2052Australia
| | - Patrick Meir
- School of GeosciencesThe University of EdinburghEdinburghEH9 3FFUK
| | - Lucas A. Cernusak
- College of Science and EngineeringJames Cook UniversityCairnsQld4878Australia
| | - Rachael V. Gallagher
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityLocked Bag 1797PenrithNSW2751Australia
| | - Anna M. Ukkola
- ARC Centre of Excellence for Climate ExtremesSydneyNSW2052Australia
- Climate Change Research CentreUniversity of New South WalesSydneyNSW2052Australia
| | - Sami W. Rifai
- ARC Centre of Excellence for Climate ExtremesSydneyNSW2052Australia
- Climate Change Research CentreUniversity of New South WalesSydneyNSW2052Australia
| | - Brendan Choat
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityLocked Bag 1797PenrithNSW2751Australia
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10
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Rodriguez‐Dominguez CM, Forner A, Martorell S, Choat B, Lopez R, Peters JMR, Pfautsch S, Mayr S, Carins‐Murphy MR, McAdam SAM, Richardson F, Diaz‐Espejo A, Hernandez‐Santana V, Menezes‐Silva PE, Torres‐Ruiz JM, Batz TA, Sack L. Leaf water potential measurements using the pressure chamber: Synthetic testing of assumptions towards best practices for precision and accuracy. Plant Cell Environ 2022; 45:2037-2061. [PMID: 35394651 PMCID: PMC9322401 DOI: 10.1111/pce.14330] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/21/2022] [Accepted: 03/26/2022] [Indexed: 05/24/2023]
Abstract
Leaf water potential (ψleaf ), typically measured using the pressure chamber, is the most important metric of plant water status, providing high theoretical value and information content for multiple applications in quantifying critical physiological processes including drought responses. Pressure chamber measurements of ψleaf (ψleafPC ) are most typical, yet, the practical complexity of the technique and of the underlying theory has led to ambiguous understanding of the conditions to optimize measurements. Consequently, specific techniques and precautions diversified across the global research community, raising questions of reliability and repeatability. Here, we surveyed specific methods of ψleafPC from multiple laboratories, and synthesized experiments testing common assumptions and practices in ψleafPC for diverse species: (i) the need for equilibration of previously transpiring leaves; (ii) leaf storage before measurement; (iii) the equilibration of ψleaf for leaves on bagged branches of a range of dehydration; (iv) the equilibration of ψleaf across the lamina for bagged leaves, and the accuracy of measuring leaves with artificially 'elongated petioles'; (v) the need in ψleaf measurements for bagging leaves and high humidity within the chamber; (vi) the need to avoid liquid water on leaf surfaces; (vii) the use of 'pulse' pressurization versus gradual pressurization; and (viii) variation among experimenters in ψleafPC determination. Based on our findings we provide a best practice protocol to maximise accuracy, and provide recommendations for ongoing species-specific tests of important assumptions in future studies.
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Affiliation(s)
- Celia M. Rodriguez‐Dominguez
- Protection of the Soil, Plant, Water SystemIrrigation and Crop Ecophysiology Group, IRNAS‐CSICSevillaSpain
- Plant BiotechnologyLaboratory of Plant Molecular Ecophysiology, IRNAS‐CSICSevillaSpain
| | - Alicia Forner
- Department of Biogeography and Global Change, International Global Change Laboratory (LINCGlobal), Museo Nacional de Ciencias NaturalesConsejo Superior de Investigaciones CientíficasMadridSpain
- Department of Ecology, Centro de Investigaciones sobre Desertificación, Consejo Superior de Investigaciones Científicas (CSIC)University of València and Generalitat ValencianaValenciaSpain
| | - Sebastia Martorell
- Departament de Biologia, Research Group on Plant Biology under Mediterranean ConditionsUniversitat de les Illes BalearsPalma de MallorcaSpain
| | - Brendan Choat
- Plants, Animals and Interactions, Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNew South WalesAustralia
| | - Rosana Lopez
- Departamento de Sistemas y Recursos NaturalesUniversidad Politécnica de MadridMadridSpain
| | - Jennifer M. R. Peters
- Division of Environmental Science, Oak Ridge National LaboratoryClimate Change Science InstituteOak RidgeTennesseeUSA
| | - Sebastian Pfautsch
- Geography, Tourism and Urban Planning, Urban Studies, School of Social Science and PsychologyWestern Sydney UniversityPenrithNew South WalesAustralia
| | - Stefan Mayr
- Department of BotanyUniversity of InnsbruckInnsbruckAustria
| | - Madeline R. Carins‐Murphy
- Plant Sciences, Discipline of Biological Sciences, School of Natural SciencesUniversity of TasmaniaHobartAustralia
| | - Scott A. M. McAdam
- Department of Botany and Plant Pathology, Purdue Center for Plant BiologyPurdue UniversityWest LafayetteIndianaUSA
| | - Freya Richardson
- Plant Sciences, Discipline of Biological Sciences, School of Natural SciencesUniversity of TasmaniaHobartAustralia
| | - Antonio Diaz‐Espejo
- Protection of the Soil, Plant, Water SystemIrrigation and Crop Ecophysiology Group, IRNAS‐CSICSevillaSpain
- Plant BiotechnologyLaboratory of Plant Molecular Ecophysiology, IRNAS‐CSICSevillaSpain
| | - Virginia Hernandez‐Santana
- Protection of the Soil, Plant, Water SystemIrrigation and Crop Ecophysiology Group, IRNAS‐CSICSevillaSpain
- Plant BiotechnologyLaboratory of Plant Molecular Ecophysiology, IRNAS‐CSICSevillaSpain
| | - Paulo E. Menezes‐Silva
- Laboratory of Integrative Physics and Physiology of Trees in a Fluctuating EnvironmentUniversité Clermont‐Auvergne, INRAE, PIAFClermont‐FerrandFrance
| | - Jose M. Torres‐Ruiz
- Laboratory of Integrative Physics and Physiology of Trees in a Fluctuating EnvironmentUniversité Clermont‐Auvergne, INRAE, PIAFClermont‐FerrandFrance
| | - Timothy A. Batz
- Department of Botany and Plant Pathology, Purdue Center for Plant BiologyPurdue UniversityWest LafayetteIndianaUSA
| | - Lawren Sack
- Department of Ecology and Evolutionary BiologyUniversity of CaliforniaLos AngelesCaliforniaUSA
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11
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Jacob V, Choat B, Churchill AC, Zhang H, Barton CVM, Krishnananthaselvan A, Post AK, Power SA, Medlyn BE, Tissue DT. High safety margins to drought-induced hydraulic failure found in five pasture grasses. Plant Cell Environ 2022; 45:1631-1646. [PMID: 35319101 DOI: 10.1111/pce.14318] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/13/2022] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
Determining the relationship between reductions in stomatal conductance (gs ) and leaf water transport during dehydration is key to understanding plant drought responses. While numerous studies have analysed the hydraulic function of woody species, minimal research has been conducted on grasses. Here, we sought to characterize hydraulic vulnerability in five widely-occurring pasture grasses (including both C3 and C4 grasses) and determine whether reductions in gs and leaf hydraulic conductance (Kleaf ) during dehydration could be attributed to xylem embolism. Using the optical vulnerability (OV) technique, we found that all species were highly resistant to xylem embolism when compared to other herbaceous angiosperms, with 50% xylem embolism (PX50 ) occurring at xylem pressures ranging from -4.4 to -6.1 MPa. We observed similar reductions in gs and Kleaf under mild water stress for all species, occurring well before PX50 . The onset of xylem embolism (PX12 ) occurred consistently after stomatal closure and 90% reduction of Kleaf . Our results suggest that factors other than xylem embolism are responsible for the majority of reductions in gs and Kleaf during drought and reductions in the productivity of pasture species under moderate drought may not be driven by embolism.
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Affiliation(s)
- Vinod Jacob
- Western Sydney University, Penrith, New South Wales, Australia
| | - Brendan Choat
- Western Sydney University, Penrith, New South Wales, Australia
| | | | - Haiyang Zhang
- Western Sydney University, Penrith, New South Wales, Australia
| | | | | | - Alison K Post
- Department of Biology, Colorado State University, Fort Collins, Colorado, USA
| | - Sally A Power
- Western Sydney University, Penrith, New South Wales, Australia
| | | | - David T Tissue
- Western Sydney University, Penrith, New South Wales, Australia
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12
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Gauthey A, Backes D, Balland J, Alam I, Maher DT, Cernusak LA, Duke NC, Medlyn BE, Tissue DT, Choat B. The Role of Hydraulic Failure in a Massive Mangrove Die-Off Event. Front Plant Sci 2022; 13:822136. [PMID: 35574083 PMCID: PMC9094047 DOI: 10.3389/fpls.2022.822136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 03/25/2022] [Indexed: 06/15/2023]
Abstract
Between late 2015 and early 2016, more than 7,000 ha of mangrove forest died along the coastline of the Gulf of Carpentaria, in northern Australia. This massive die-off was preceded by a strong 2015/2016 El Niño event, resulting in lower precipitation, a drop in sea level and higher than average temperatures in northern Australia. In this study, we investigated the role of hydraulic failure in the mortality and recovery of the dominant species, Avicennia marina, 2 years after the mortality event. We measured predawn water potential (Ψpd) and percent loss of stem hydraulic conductivity (PLC) in surviving individuals across a gradient of impact. We also assessed the vulnerability to drought-induced embolism (Ψ50) for the species. Areas with severe canopy dieback had higher native PLC (39%) than minimally impacted areas (6%), suggesting that hydraulic recovery was ongoing. The high resistance of A. marina to water-stress-induced embolism (Ψ50 = -9.6 MPa), indicates that severe water stress (Ψpd < -10 MPa) would have been required to cause mortality in this species. Our data indicate that the natural gradient of water-stress enhanced the impact of El Niño, leading to hydraulic failure and mortality in A. marina growing on severely impacted (SI) zones. It is likely that lowered sea levels and less frequent inundation by seawater, combined with lower inputs of fresh water, high evaporative demand and high temperatures, led to the development of hyper-salinity and extreme water stress during the 2015/16 summer.
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Affiliation(s)
- Alice Gauthey
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- Plant Ecology Research Laboratory PERL, Ecole Polytechnique Fédérale de Lausanne EPFL, Lausanne, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
| | - Diana Backes
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Jeff Balland
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Iftakharul Alam
- College of Science and Engineering, James Cook University, Cairns, QLD, Australia
| | - Damien T. Maher
- Faculty of Science and Engineering, Southern Cross University, Lismore, NSW, Australia
| | - Lucas A. Cernusak
- College of Science and Engineering, James Cook University, Cairns, QLD, Australia
| | - Norman C. Duke
- TropWATER Centre, James Cook University, Townsville, QLD, Australia
| | - Belinda E. Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - David T. Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
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13
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Li X, Xi B, Wu X, Choat B, Feng J, Jiang M, Tissue D. Unlocking Drought-Induced Tree Mortality: Physiological Mechanisms to Modeling. Front Plant Sci 2022; 13:835921. [PMID: 35444681 PMCID: PMC9015645 DOI: 10.3389/fpls.2022.835921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
Drought-related tree mortality has become a major concern worldwide due to its pronounced negative impacts on the functioning and sustainability of forest ecosystems. However, our ability to identify the species that are most vulnerable to drought, and to pinpoint the spatial and temporal patterns of mortality events, is still limited. Model is useful tools to capture the dynamics of vegetation at spatiotemporal scales, yet contemporary land surface models (LSMs) are often incapable of predicting the response of vegetation to environmental perturbations with sufficient accuracy, especially under stressful conditions such as drought. Significant progress has been made regarding the physiological mechanisms underpinning plant drought response in the past decade, and plant hydraulic dysfunction has emerged as a key determinant for tree death due to water shortage. The identification of pivotal physiological events and relevant plant traits may facilitate forecasting tree mortality through a mechanistic approach, with improved precision. In this review, we (1) summarize current understanding of physiological mechanisms leading to tree death, (2) describe the functionality of key hydraulic traits that are involved in the process of hydraulic dysfunction, and (3) outline their roles in improving the representation of hydraulic function in LSMs. We urge potential future research on detailed hydraulic processes under drought, pinpointing corresponding functional traits, as well as understanding traits variation across and within species, for a better representation of drought-induced tree mortality in models.
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Affiliation(s)
- Ximeng Li
- College of Life and Environmental Science, Minzu University of China, Beijing, China
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Benye Xi
- Ministry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing, China
| | - Xiuchen Wu
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Jinchao Feng
- College of Life and Environmental Science, Minzu University of China, Beijing, China
| | - Mingkai Jiang
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - David Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- Global Centre for Land-based Innovation, Western Sydney University, Richmond, NSW, Australia
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14
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Gauthey A, Peters JMR, Lòpez R, Carins-Murphy MR, Rodriguez-Dominguez CM, Tissue DT, Medlyn BE, Brodribb TJ, Choat B. Mechanisms of xylem hydraulic recovery after drought in Eucalyptus saligna. Plant Cell Environ 2022; 45:1216-1228. [PMID: 35119114 DOI: 10.1111/pce.14265] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 12/06/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The mechanisms by which woody plants recover xylem hydraulic capacity after drought stress are not well understood, particularly with regard to the role of embolism refilling. We evaluated the recovery of xylem hydraulic capacity in young Eucalyptus saligna plants exposed to cycles of drought stress and rewatering. Plants were exposed to moderate and severe drought stress treatments, with recovery monitored at time intervals from 24 h to 6 months after rewatering. The percentage loss of xylem vessels due to embolism (PLV) was quantified at each time point using microcomputed tomography with stem water potential (Ψx ) and canopy transpiration (Ec ) measured before scans. Plants exposed to severe drought stress suffered high levels of embolism (47.38% ± 10.97% PLV) and almost complete canopy loss. No evidence of embolism refilling was observed at 24 h, 1 week, or 3 weeks after rewatering despite rapid recovery in Ψx . Recovery of hydraulic capacity was achieved over a 6-month period by growth of new xylem tissue, with canopy leaf area and Ec recovering over the same period. These findings indicate that E. saligna recovers slowly from severe drought stress, with potential for embolism to persist in the xylem for many months after rainfall events.
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Affiliation(s)
- Alice Gauthey
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Jennifer M R Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
- Environmental Sciences Division, Oak Ridge National Laboratory, Climate Change Science Institute, Oak Ridge, Tennessee, USA
| | - Rosana Lòpez
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
- Departamento de Sistemas y Recursos Naturales, Universidad Politécnica de Madrid, Madrid, Spain
| | | | - Celia M Rodriguez-Dominguez
- Irrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS, CSIC), Sevilla, Spain
- Laboratory of Plant Molecular Ecophysiology, Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS, CSIC), Sevilla, Spain
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
- Global Centre for Land Based Innovation, Western Syndey University, Richmond, New South Wales, Australia
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Tim J Brodribb
- School of Biological Sciences, University of Tasmania, Hobart, Tasmania, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
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15
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Duan H, Resco de Dios V, Wang D, Zhao N, Huang G, Liu W, Wu J, Zhou S, Choat B, Tissue DT. Testing the limits of plant drought stress and subsequent recovery in four provenances of a widely distributed subtropical tree species. Plant Cell Environ 2022; 45:1187-1203. [PMID: 34985807 DOI: 10.1111/pce.14254] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 12/05/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
Drought-induced tree mortality may increase with ongoing climate change. Unraveling the links between stem hydraulics and mortality thresholds, and the effects of intraspecific variation, remain important unresolved issues. We conducted a water manipulation experiment in a rain-out shelter, using four provenances of Schima superba originating from a gradient of annual precipitation (1124-1796 mm) and temperature (16.4-22.4°C). Seedlings were droughted to three levels of percentage loss of hydraulic conductivity (i.e., P50 , P88 and P99) and subsequently rewatered to field capacity for 30 days; traits related to water and carbon relations were measured. The lethal water potential associated with incipient mortality was between P50 and P88 . Seedlings exhibited similar drought responses in xylem water potential, hydraulic conductivity and gas exchange. Upon rehydration, patterns of gas exchange differed among provenances but were not related to the climate at the origin. The four provenances exhibited a similar degree of stem hydraulic recovery, which was correlated with the magnitude of antecedent drought and stem soluble sugar at the end of the drought. Results suggest that there were intraspecific differences in the capacity of S. superba seedlings for carbon assimilation during recovery, indicating a decoupling between gas exchange recovery and stem hydraulics across provenances.
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Affiliation(s)
- Honglang Duan
- Institute for Forest Resources and Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang, China
- Jiangxi Provincial Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology, Nanchang, China
| | - Víctor Resco de Dios
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
- Department of Crop and Forest Sciences, Unversitat de Lleida, Lleida, Spain
- Joint Research Unit CTFC-AGROTECNIO-CERCA Centre, Lleida, Spain
| | - Defu Wang
- Jiangxi Provincial Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology, Nanchang, China
| | - Nan Zhao
- Jiangxi Provincial Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology, Nanchang, China
| | - Guomin Huang
- Jiangxi Provincial Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology, Nanchang, China
| | - Wenfei Liu
- Jiangxi Provincial Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology, Nanchang, China
| | - Jianping Wu
- Laboratory of Ecology and Evolutionary Biology, Yunnan University, Kunming, China
| | - Shuangxi Zhou
- Department of Biological Sciences, Macquarie University, New South Wales, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Richmond, New South Wales, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Richmond, New South Wales, Australia
- Global Centre for Land-based Innovation, Western Sydney University, Hawkesbury Campus, Richmond, New South Wales, Australia
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16
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Griebel A, Peters JMR, Metzen D, Maier C, Barton CVM, Speckman HN, Boer MM, Nolan RH, Choat B, Pendall E. Tapping into the physiological responses to mistletoe infection during heat and drought stress. Tree Physiol 2022; 42:523-536. [PMID: 34612494 DOI: 10.1093/treephys/tpab113] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Mistletoes are important co-contributors to tree mortality globally, particularly during droughts. In Australia, mistletoe distributions are expanding in temperate woodlands, while their hosts have experienced unprecedented heat and drought stress in recent years. We investigated whether the excessive water use of mistletoes increased the probability of xylem emboli in a mature woodland during the recent record drought that was compounded by multiple heatwaves. We continuously recorded transpiration ($T_{SLA}$) of infected and uninfected branches from two eucalypt species over two summers, monitored stem and leaf water potentials ($\Psi $) and used hydraulic vulnerability curves to estimate percent loss in conductivity (PLC) for each species. Variations in weather (vapor pressure deficit, photosynthetically active radiation, soil water content), host species and % mistletoe foliage explained 78% of hourly $T_{SLA}$. While mistletoe acted as an uncontrollable sink for water in the host even during typical summer days, daily $T_{SLA}$ increased up to 4-fold in infected branches on hot days, highlighting the previously overlooked importance of temperature stress in amplifying water loss in mistletoes. The increased water use of mistletoes resulted in significantly decreased host $\Psi _{\rm{leaf}}$ and $\Psi _{\rm{trunk}}$. It further translated to an estimated increase of up to 11% PLC for infected hosts, confirming greater hydraulic dysfunction of infected trees that place them at higher risk of hydraulic failure. However, uninfected branches of Eucalyptus fibrosa F.Muell. had much tighter controls on water loss than uninfected branches of Eucalyptus moluccana Roxb., which shifted the risk of hydraulic failure towards an increased risk of carbon starvation for E. fibrosa. The contrasting mechanistic responses to heat and drought stress between both co-occurring species demonstrates the complexity of host-parasite interactions and highlights the challenge in predicting species-specific responses to biotic agents in a warmer and drier climate.
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Affiliation(s)
- Anne Griebel
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
| | - Jennifer M R Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
- Climate Change Science Institute & Environmental Science Division, Oak Ridge National Laboratory, 1 Bethel Valley Rd, Oak Ridge, TN 37831, USA
| | - Daniel Metzen
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
| | - Chelsea Maier
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
| | - Craig V M Barton
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
| | - Heather N Speckman
- Department of Botany, University of Wyoming, 1000 E. Univ. Ave, Laramie, WY 82071, USA
| | - Matthias M Boer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
| | - Rachael H Nolan
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
| | - Elise Pendall
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2571, Australia
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17
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Pivovaroff AL, McDowell NG, Rodrigues TB, Brodribb T, Cernusak LA, Choat B, Grossiord C, Ishida Y, Jardine KJ, Laurance S, Leff R, Li W, Liddell M, Mackay DS, Pacheco H, Peters J, de J Sampaio Filho I, Souza DC, Wang W, Zhang P, Chambers J. Stability of tropical forest tree carbon-water relations in a rainfall exclusion treatment through shifts in effective water uptake depth. Glob Chang Biol 2021; 27:6454-6466. [PMID: 34469040 DOI: 10.1111/gcb.15869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
Increasing severity and frequency of drought is predicted for large portions of the terrestrial biosphere, with major impacts already documented in wet tropical forests. Using a 4-year rainfall exclusion experiment in the Daintree Rainforest in northeast Australia, we examined canopy tree responses to reduced precipitation and soil water availability by quantifying seasonal changes in plant hydraulic and carbon traits for 11 tree species between control and drought treatments. Even with reduced soil volumetric water content in the upper 1 m of soil in the drought treatment, we found no significant difference between treatments for predawn and midday leaf water potential, photosynthesis, stomatal conductance, foliar stable carbon isotope composition, leaf mass per area, turgor loss point, xylem vessel anatomy, or leaf and stem nonstructural carbohydrates. While empirical measurements of aboveground traits revealed homeostatic maintenance of plant water status and traits in response to reduced soil moisture, modeled belowground dynamics revealed that trees in the drought treatment shifted the depth from which water was acquired to deeper soil layers. These findings reveal that belowground acclimation of tree water uptake depth may buffer tropical rainforests from more severe droughts that may arise in future with climate change.
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Affiliation(s)
- Alexandria L Pivovaroff
- Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Nate G McDowell
- Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
- School of Biological Sciences, Washington State University, Pullman, Washington, USA
| | - Tayana Barrozo Rodrigues
- Forest Management Laboratory, National Institute of Amazonian Research, Manaus, Amazonas, Brazil
| | - Tim Brodribb
- School of Biological Sciences, University of Tasmania, Hobart, Tasmania, Australia
| | - Lucas A Cernusak
- College of Science and Engineering, James Cook University, Cairns, Queensland, Australia
| | - Brendan Choat
- University of Western Sydney, Hawkesbury Institute for the Environment, Richmond, New South Wales, Australia
| | - Charlotte Grossiord
- Plant Ecology Research Laboratory, School of Architecture, Civil and Environmental Engineering, EPFL, Lausanne, Switzerland
- Functional Plant Ecology, Community Ecology Unit, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Lausanne, Switzerland
| | - Yoko Ishida
- College of Science and Engineering, James Cook University, Cairns, Queensland, Australia
| | - Kolby J Jardine
- Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Susan Laurance
- College of Science and Engineering, James Cook University, Cairns, Queensland, Australia
| | - Riley Leff
- Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Weibin Li
- Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
- State Key Laboratory of Grassland and Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Michael Liddell
- College of Science and Engineering, James Cook University, Cairns, Queensland, Australia
| | - D Scott Mackay
- Department of Geography and Department of Environment & Sustainability, University at Buffalo, Buffalo, New York, USA
| | - Heather Pacheco
- Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Jennifer Peters
- University of Western Sydney, Hawkesbury Institute for the Environment, Richmond, New South Wales, Australia
- Oak Ridge National Laboratory, Climate Change Science Institute & Environmental Science Division, Oak Ridge, Tennessee, USA
| | | | - Daisy C Souza
- Forest Management Laboratory, National Institute of Amazonian Research, Manaus, Amazonas, Brazil
| | - Wenzhi Wang
- Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Peipei Zhang
- Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Jeff Chambers
- Climate Sciences Department, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
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18
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Chen Y, Choat B, Sterck F, Maenpuen P, Katabuchi M, Zhang S, Tomlinson KW, Oliveira RS, Zhang Y, Shen J, Cao K, Jansen S. Cover Image. Ecol Lett 2021. [DOI: 10.1111/ele.13560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Falster D, Gallagher R, Wenk EH, Wright IJ, Indiarto D, Andrew SC, Baxter C, Lawson J, Allen S, Fuchs A, Monro A, Kar F, Adams MA, Ahrens CW, Alfonzetti M, Angevin T, Apgaua DMG, Arndt S, Atkin OK, Atkinson J, Auld T, Baker A, von Balthazar M, Bean A, Blackman CJ, Bloomfield K, Bowman DMJS, Bragg J, Brodribb TJ, Buckton G, Burrows G, Caldwell E, Camac J, Carpenter R, Catford JA, Cawthray GR, Cernusak LA, Chandler G, Chapman AR, Cheal D, Cheesman AW, Chen SC, Choat B, Clinton B, Clode PL, Coleman H, Cornwell WK, Cosgrove M, Crisp M, Cross E, Crous KY, Cunningham S, Curran T, Curtis E, Daws MI, DeGabriel JL, Denton MD, Dong N, Du P, Duan H, Duncan DH, Duncan RP, Duretto M, Dwyer JM, Edwards C, Esperon-Rodriguez M, Evans JR, Everingham SE, Farrell C, Firn J, Fonseca CR, French BJ, Frood D, Funk JL, Geange SR, Ghannoum O, Gleason SM, Gosper CR, Gray E, Groom PK, Grootemaat S, Gross C, Guerin G, Guja L, Hahs AK, Harrison MT, Hayes PE, Henery M, Hochuli D, Howell J, Huang G, Hughes L, Huisman J, Ilic J, Jagdish A, Jin D, Jordan G, Jurado E, Kanowski J, Kasel S, Kellermann J, Kenny B, Kohout M, Kooyman RM, Kotowska MM, Lai HR, Laliberté E, Lambers H, Lamont BB, Lanfear R, van Langevelde F, Laughlin DC, Laugier-Kitchener BA, Laurance S, Lehmann CER, Leigh A, Leishman MR, Lenz T, Lepschi B, Lewis JD, Lim F, Liu U, Lord J, Lusk CH, Macinnis-Ng C, McPherson H, Magallón S, Manea A, López-Martinez A, Mayfield M, McCarthy JK, Meers T, van der Merwe M, Metcalfe DJ, Milberg P, Mokany K, Moles AT, Moore BD, Moore N, Morgan JW, Morris W, Muir A, Munroe S, Nicholson Á, Nicolle D, Nicotra AB, Niinemets Ü, North T, O'Reilly-Nugent A, O'Sullivan OS, Oberle B, Onoda Y, Ooi MKJ, Osborne CP, Paczkowska G, Pekin B, Guilherme Pereira C, Pickering C, Pickup M, Pollock LJ, Poot P, Powell JR, Power SA, Prentice IC, Prior L, Prober SM, Read J, Reynolds V, Richards AE, Richardson B, Roderick ML, Rosell JA, Rossetto M, Rye B, Rymer PD, Sams MA, Sanson G, Sauquet H, Schmidt S, Schönenberger J, Schulze ED, Sendall K, Sinclair S, Smith B, Smith R, Soper F, Sparrow B, Standish RJ, Staples TL, Stephens R, Szota C, Taseski G, Tasker E, Thomas F, Tissue DT, Tjoelker MG, Tng DYP, de Tombeur F, Tomlinson K, Turner NC, Veneklaas EJ, Venn S, Vesk P, Vlasveld C, Vorontsova MS, Warren CA, Warwick N, Weerasinghe LK, Wells J, Westoby M, White M, Williams NSG, Wills J, Wilson PG, Yates C, Zanne AE, Zemunik G, Ziemińska K. AusTraits, a curated plant trait database for the Australian flora. Sci Data 2021; 8:254. [PMID: 34593819 PMCID: PMC8484355 DOI: 10.1038/s41597-021-01006-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 08/05/2021] [Indexed: 02/08/2023] Open
Abstract
We introduce the AusTraits database - a compilation of values of plant traits for taxa in the Australian flora (hereafter AusTraits). AusTraits synthesises data on 448 traits across 28,640 taxa from field campaigns, published literature, taxonomic monographs, and individual taxon descriptions. Traits vary in scope from physiological measures of performance (e.g. photosynthetic gas exchange, water-use efficiency) to morphological attributes (e.g. leaf area, seed mass, plant height) which link to aspects of ecological variation. AusTraits contains curated and harmonised individual- and species-level measurements coupled to, where available, contextual information on site properties and experimental conditions. This article provides information on version 3.0.2 of AusTraits which contains data for 997,808 trait-by-taxon combinations. We envision AusTraits as an ongoing collaborative initiative for easily archiving and sharing trait data, which also provides a template for other national or regional initiatives globally to fill persistent gaps in trait knowledge.
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Affiliation(s)
- Daniel Falster
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia.
| | - Rachael Gallagher
- Department of Biological Sciences, Macquarie University, Sydney, Australia
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Elizabeth H Wenk
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | - Ian J Wright
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Dony Indiarto
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | | | - Caitlan Baxter
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | - James Lawson
- NSW Department of Primary Industries, Orange, Australia
| | - Stuart Allen
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Anne Fuchs
- Centre for Australian National Biodiversity Research (a joint venture between Parks Australia and CSIRO), Canberra, ACT, Australia
| | - Anna Monro
- Centre for Australian National Biodiversity Research (a joint venture between Parks Australia and CSIRO), Canberra, ACT, Australia
| | - Fonti Kar
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | - Mark A Adams
- Swinburne University of Technology, Hawthorn, Australia
| | - Collin W Ahrens
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Matthew Alfonzetti
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | | | - Deborah M G Apgaua
- Centre for Rainforest Studies, School for Field Studies, Yungaburra, Queensland, 4872, Australia
| | | | - Owen K Atkin
- The Australian National University, Canberra, Australia
| | - Joe Atkinson
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | - Tony Auld
- NSW Department of Planning Industry and Environment, Parramatta, Australia
| | | | - Maria von Balthazar
- Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | | | | | | | | | - Jason Bragg
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens and Domain Trust, Sydney, Australia
| | | | | | | | | | - James Camac
- Centre of Excellence for Biosecurity Risk Analysis, The University of Melbourne, Melbourne, Australia
| | | | | | | | - Lucas A Cernusak
- College of Science and Engineering, James Cook University, Cairns, QLD, Australia
| | | | - Alex R Chapman
- Western Australian Herbarium, Keiran McNamara Conservation Science Centre, Department of Biodiversity, Conservation and Attractions, Western Australia, Kensington, Australia
| | - David Cheal
- Centre for Environmental Management, School of Health & Life Sciences, Federation University, Mount Helen, Australia
| | | | - Si-Chong Chen
- Royal Botanic Gardens, Richmond, Kew, United Kingdom
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Brook Clinton
- Centre for Australian National Biodiversity Research (a joint venture between Parks Australia and CSIRO), Canberra, ACT, Australia
| | - Peta L Clode
- University of Western Australia, Crawley, Australia
| | - Helen Coleman
- Western Australian Herbarium, Keiran McNamara Conservation Science Centre, Department of Biodiversity, Conservation and Attractions, Western Australia, Kensington, Australia
| | - William K Cornwell
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | | | - Michael Crisp
- The Australian National University, Canberra, Australia
| | - Erika Cross
- Charles Sturt University, Bathurst, Australia
| | - Kristine Y Crous
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Saul Cunningham
- Fenner School of Environment and Society, The Australian National University, Canberra, Australia
| | | | - Ellen Curtis
- University of Technology Sydney, Sydney, Australia
| | - Matthew I Daws
- Environment Department, Alcoa of Australia, Huntly, Western Australia, Australia
| | - Jane L DeGabriel
- School of Marine and Tropical Biology, James Cook University, Douglas, Australia
| | - Matthew D Denton
- School of Agriculture, Food and Wine, University of Adelaide, Adelaide, Australia
| | - Ning Dong
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | | | - Honglang Duan
- Institute for Forest Resources & Environment of Guizhou, Guizhou University, Guiyang, China
| | | | - Richard P Duncan
- Institute for Applied Ecology, University of Canberra, ACT, 2617, Canberra, Australia
| | - Marco Duretto
- National Herbarium of New South Wales, Australian Institute of Botanical Science, Royal Botanic Gardens and Domain Trust, Sydney, Australia
| | - John M Dwyer
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | | | | | - John R Evans
- The Australian National University, Canberra, Australia
| | - Susan E Everingham
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | | | - Jennifer Firn
- Queensland University of Technology, Brisbane, Australia
| | - Carlos Roberto Fonseca
- Departamento de Ecologia, Universidade Federal do Rio Grande do Norte, Natal, Natal - RN, Brazil
| | | | - Doug Frood
- Pathways Bushland and Environment Consultancy, Sydney, Australia
| | - Jennifer L Funk
- Department of Plant Sciences, University of California, Davis, USA
| | | | - Oula Ghannoum
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | | | - Carl R Gosper
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, WA, Australia
| | - Emma Gray
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | | | - Saskia Grootemaat
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | | | - Greg Guerin
- Terrestrial Ecosystem Research Network, The School of Biological Sciences, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Lydia Guja
- Centre for Australian National Biodiversity Research (a joint venture between Parks Australia and CSIRO), Canberra, ACT, Australia
| | - Amy K Hahs
- School of Ecosystem and Forest Sciences, The University of Melbourne, Melbourne, Australia
| | | | | | - Martin Henery
- arks Australia, Department of Agriculture, Water and the Environment, Hobart, Australia
| | - Dieter Hochuli
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, Australia
| | | | - Guomin Huang
- Nanchang Institute of Technology, Nanchang, China
| | - Lesley Hughes
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - John Huisman
- Western Australian Herbarium, Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, Western Australia, Australia
| | | | - Ashika Jagdish
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | - Daniel Jin
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, Australia
| | | | - Enrique Jurado
- Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, Mexico
| | | | | | - Jürgen Kellermann
- State Herbarium of South Australia, Botanic Gardens and State Herbarium, Hackney Road, Adelaide, SA, 5000, Australia
| | | | - Michele Kohout
- Department of Environment, Land, Water and Planning, Victoria, Australia
| | - Robert M Kooyman
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Martyna M Kotowska
- Department of Plant Ecology and Ecosystems Research, University of Goettingen, Göttingen, Germany
| | - Hao Ran Lai
- University of Canterbury, Christchurch, New Zealand
| | - Etienne Laliberté
- Institut de recherche en biologie végétale, Université de Montréal, 4101 Sherbrooke Est, Montréal, H1X 2B2, Canada
| | - Hans Lambers
- University of Western Australia, Crawley, Australia
| | | | - Robert Lanfear
- Ecology and Evolution, Research School of Biology, Australian National University, Canberra, Australia
| | - Frank van Langevelde
- Wildlife Ecology & Conservation Group, Wageningen University, Wageningen, The Netherlands
| | - Daniel C Laughlin
- Department of Botany, University of Wyoming, Laramie, WY, 82071, USA
| | | | | | | | - Andrea Leigh
- University of Technology Sydney, Sydney, Australia
| | | | - Tanja Lenz
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Brendan Lepschi
- Centre for Australian National Biodiversity Research (a joint venture between Parks Australia and CSIRO), Canberra, ACT, Australia
| | | | - Felix Lim
- AMAP (Botanique et Modélisation de l'Architecture des Plantes et des Végétations), Université de Montpellier, CIRAD, CNRS, INRA, IRD, Montpellier, France
| | | | | | - Christopher H Lusk
- Environmental Research Institute, University of Waikato, Hamilton, New Zealand
| | | | - Hannah McPherson
- National Herbarium of New South Wales, Australian Institute of Botanical Science, Royal Botanic Gardens and Domain Trust, Sydney, Australia
| | - Susana Magallón
- Laboratorio Nacional de Ciencias de la Sostenibilidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Anthony Manea
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Andrea López-Martinez
- Laboratorio Nacional de Ciencias de la Sostenibilidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Margaret Mayfield
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | | | | | - Marlien van der Merwe
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens and Domain Trust, Sydney, Australia
| | | | | | | | - Angela T Moles
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | - Ben D Moore
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | | | | | | | - Annette Muir
- Department of Environment, Land, Water and Planning, Victoria, Australia
| | - Samantha Munroe
- Terrestrial Ecosystem Research Network, The School of Biological Sciences, The University of Adelaide, Adelaide, SA, 5005, Australia
| | | | - Dean Nicolle
- Currency Creek Arboretum, Currency Creek, Australia
| | | | - Ülo Niinemets
- Estonian University of Life Sciences, Tartu, Estonia
| | - Tom North
- Centre for Australian National Biodiversity Research (a joint venture between Parks Australia and CSIRO), Canberra, ACT, Australia
| | | | | | - Brad Oberle
- Division of Natural Sciences, New College of Florida, Sarasota, USA
| | - Yusuke Onoda
- Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Mark K J Ooi
- Centre for Ecosystem Science, School of Biological, Earth, and Environmental Sciences, UNSW, Sydney, Australia
| | - Colin P Osborne
- University of Sheffield, Department of Animal and Plant Sciences, Sheffield, United Kingdom
| | - Grazyna Paczkowska
- Western Australian Herbarium, Keiran McNamara Conservation Science Centre, Department of Biodiversity, Conservation and Attractions, Western Australia, Kensington, Australia
| | - Burak Pekin
- Istanbul Technical University, Eurasia Institute of Earth Sciences, Istanbul, Turkey
| | - Caio Guilherme Pereira
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, USA
| | | | | | | | - Pieter Poot
- College of Science and Engineering, James Cook University, Cairns, QLD, Australia
| | - Jeff R Powell
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Sally A Power
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | | | | | | | - Jennifer Read
- School of Biological Sciences, Monash University, Clayton, Australia
| | - Victoria Reynolds
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | | | - Ben Richardson
- Western Australian Herbarium, Department of Biodiversity, Conservation and Attractions, Western Australia, Kensington, Australia
| | | | - Julieta A Rosell
- Laboratorio Nacional de Ciencias de la Sostenibilidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Maurizio Rossetto
- National Herbarium of New South Wales, Australian Institute of Botanical Science, Royal Botanic Gardens and Domain Trust, Sydney, Australia
| | - Barbara Rye
- Western Australian Herbarium, Department of Biodiversity, Conservation and Attractions, Western Australia, Kensington, Australia
| | - Paul D Rymer
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Michael A Sams
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | - Gordon Sanson
- School of Biological Sciences, Monash University, Clayton, Australia
| | - Hervé Sauquet
- National Herbarium of New South Wales, Australian Institute of Botanical Science, Royal Botanic Gardens and Domain Trust, Sydney, Australia
| | - Susanne Schmidt
- School of Agriculture and Food Science, University of Queensland, St Lucia, Australia
| | - Jürg Schönenberger
- Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | | | - Kerrie Sendall
- Rider University, Lawrence Township, Lawrenceville, NJ, USA
| | - Steve Sinclair
- Department of Plant Ecology and Ecosystems Research, University of Goettingen, Göttingen, Germany
| | - Benjamin Smith
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Renee Smith
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | | | - Ben Sparrow
- Terrestrial Ecosystem Research Network, The School of Biological Sciences, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Rachel J Standish
- Environmental and Conservation Sciences, Murdoch University, Murdoch, Australia
| | - Timothy L Staples
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | - Ruby Stephens
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | | | - Guy Taseski
- Evolution & Ecology Research Centre, School of Biological, Earth, and Environmental Sciences, UNSW Sydney, Sydney, Australia
| | - Elizabeth Tasker
- NSW Department of Planning Industry and Environment, Parramatta, Australia
| | | | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - Mark G Tjoelker
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, Australia
| | - David Yue Phin Tng
- Centre for Rainforest Studies, School for Field Studies, Yungaburra, Queensland, 4872, Australia
| | - Félix de Tombeur
- TERRA Teaching and Research Centre, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | | | | | | | - Susanna Venn
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Burwood, Australia
| | - Peter Vesk
- University of Melbourne, Melbourne, Australia
| | - Carolyn Vlasveld
- School of Biological Sciences, Monash University, Clayton, Australia
| | | | - Charles A Warren
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, Australia
| | | | | | - Jessie Wells
- School of Biological Sciences, The University of Queensland, St Lucia, Australia
| | - Mark Westoby
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Matthew White
- Department of Environment, Land, Water and Planning, Victoria, Australia
| | | | - Jarrah Wills
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, Australia
| | - Peter G Wilson
- National Herbarium of NSW and Royal Botanic Gardens and Domain Trust, Sydney, Australia
| | - Colin Yates
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, WA, Australia
| | - Amy E Zanne
- Department of Biological Sciences, George Washington University, Washington, DC, 20052, USA
- Department of Biology, University of Miami, Coral Gables, Florida 33146 USA, George Washington University, Washington, DC, 20052, USA
| | | | - Kasia Ziemińska
- AMAP (Botanique et Modélisation de l'Architecture des Plantes et des Végétations), Université de Montpellier, CIRAD, CNRS, INRA, IRD, Montpellier, France
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Chen YJ, Choat B, Sterck F, Maenpuen P, Katabuchi M, Zhang SB, Tomlinson KW, Oliveira RS, Zhang YJ, Shen JX, Cao KF, Jansen S. Hydraulic prediction of drought-induced plant dieback and top-kill depends on leaf habit and growth form. Ecol Lett 2021; 24:2350-2363. [PMID: 34409716 DOI: 10.1111/ele.13856] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 04/19/2021] [Accepted: 07/11/2021] [Indexed: 01/05/2023]
Abstract
Hydraulic failure caused by severe drought contributes to aboveground dieback and whole-plant death. The extent to which dieback or whole-plant death can be predicted by plant hydraulic traits has rarely been tested among species with different leaf habits and/or growth forms. We investigated 19 hydraulic traits in 40 woody species in a tropical savanna and their potential correlations with drought response during an extreme drought event during the El Niño-Southern Oscillation in 2015. Plant hydraulic trait variation was partitioned substantially by leaf habit but not growth form along a trade-off axis between traits that support drought tolerance versus avoidance. Semi-deciduous species and shrubs had the highest branch dieback and top-kill (complete aboveground death) among the leaf habits or growth forms. Dieback and top-kill were well explained by combining hydraulic traits with leaf habit and growth form, suggesting integrating life history traits with hydraulic traits will yield better predictions.
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Affiliation(s)
- Ya-Jun Chen
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China.,Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Yunnan, China.,Yuanjiang Savanna Ecosystem Research Station, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yuanjiang, Yunnan, China.,Forest Ecology and Forest Management Group, Wageningen University and Research, Wageningen, the Netherlands
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Frank Sterck
- Forest Ecology and Forest Management Group, Wageningen University and Research, Wageningen, the Netherlands
| | - Phisamai Maenpuen
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Masatoshi Katabuchi
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China
| | - Shu-Bin Zhang
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China.,Yuanjiang Savanna Ecosystem Research Station, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yuanjiang, Yunnan, China
| | - Kyle W Tomlinson
- Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China
| | - Rafael S Oliveira
- Department of Plant Biology, Institute of Biology, CP6109, University of Campinas - UNICAMP, Campinas, São Paulo, Brazil
| | - Yong-Jiang Zhang
- School of Biology and Ecology, University of Maine, Orono, Maine, USA
| | - Jing-Xian Shen
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China.,Institute of Ecology and Geobotany, School of Ecology and Environmental Sciences, Yunnan University, Kunming, Yunnan, China
| | - Kun-Fang Cao
- State Key Laboratory for Conservation and Utilization of Agro-bioresources, Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning, China
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, Germany
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Peters JMR, López R, Nolf M, Hutley LB, Wardlaw T, Cernusak LA, Choat B. Living on the edge: A continental-scale assessment of forest vulnerability to drought. Glob Chang Biol 2021; 27:3620-3641. [PMID: 33852767 DOI: 10.1111/gcb.15641] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Globally, forests are facing an increasing risk of mass tree mortality events associated with extreme droughts and higher temperatures. Hydraulic dysfunction is considered a key mechanism of drought-triggered dieback. By leveraging the climate breadth of the Australian landscape and a national network of research sites (Terrestrial Ecosystem Research Network), we conducted a continental-scale study of physiological and hydraulic traits of 33 native tree species from contrasting environments to disentangle the complexities of plant response to drought across communities. We found strong relationships between key plant hydraulic traits and site aridity. Leaf turgor loss point and xylem embolism resistance were correlated with minimum water potential experienced by each species. Across the data set, there was a strong coordination between hydraulic traits, including those linked to hydraulic safety, stomatal regulation and the cost of carbon investment into woody tissue. These results illustrate that aridity has acted as a strong selective pressure, shaping hydraulic traits of tree species across the Australian landscape. Hydraulic safety margins were constrained across sites, with species from wetter sites tending to have smaller safety margin compared with species at drier sites, suggesting trees are operating close to their hydraulic thresholds and forest biomes across the spectrum may be susceptible to shifts in climate that result in the intensification of drought.
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Affiliation(s)
- Jennifer M R Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Rosana López
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Markus Nolf
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Lindsay B Hutley
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, Australia
| | - Tim Wardlaw
- ARC Centre for Forest Value, University of Tasmania, Hobart, Tas, Australia
| | - Lucas A Cernusak
- College of Science and Engineering, James Cook University, Cairns, Qld, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
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Oyanoghafo OO, O’ Brien C, Choat B, Tissue D, Rymer PD. Vulnerability to xylem cavitation of Hakea species (Proteaceae) from a range of biomes and life histories predicted by climatic niche. Ann Bot 2021; 127:909-918. [PMID: 33606015 PMCID: PMC8225280 DOI: 10.1093/aob/mcab020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND AND AIMS Extreme drought conditions across the globe are impacting biodiversity, with serious implications for the persistence of native species. However, quantitative data on physiological tolerance are not available for diverse flora to inform conservation management. We quantified physiological resistance to cavitation in the diverse Hakea genus (Proteaceae) to test predictions based on climatic origin, life history and functional traits. METHODS We sampled terminal branches of replicate plants of 16 species in a common garden. Xylem cavitation was induced in branches under varying water potentials (tension) in a centrifuge, and the tension generating 50 % loss of conductivity (stem P50) was characterized as a metric for cavitation resistance. The same branches were used to estimate plant functional traits, including wood density, specific leaf area and Huber value (sap flow area to leaf area ratio). KEY RESULTS There was significant variation in stem P50 among species, which was negatively associated with the species climate origin (rainfall and aridity). Cavitation resistance did not differ among life histories; however, a drought avoidance strategy with terete leaf form and greater Huber value may be important for species to colonize and persist in the arid biome. CONCLUSIONS This study highlights climate (rainfall and aridity), rather than life history and functional traits, as the key predictor of variation in cavitation resistance (stem P50). Rainfall for species origin was the best predictor of cavitation resistance, explaining variation in stem P50, which appears to be a major determinant of species distribution. This study also indicates that stem P50 is an adaptive trait, genetically determined, and hence reliable and robust for predicting species vulnerability to climate change. Our findings will contribute to future prediction of species vulnerability to drought and adaptive management under climate change.
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Affiliation(s)
- Osazee O Oyanoghafo
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales 2751,Australia
- Department of Plant Biology and Biotechnology, Faculty of Life Sciences, University of Benin, Benin City, Nigeria
| | - Corey O’ Brien
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales 2751,Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales 2751,Australia
| | - David Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales 2751,Australia
| | - Paul D Rymer
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales 2751,Australia
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23
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Nolan RH, Gauthey A, Losso A, Medlyn BE, Smith R, Chhajed SS, Fuller K, Song M, Li X, Beaumont LJ, Boer MM, Wright IJ, Choat B. Hydraulic failure and tree size linked with canopy die-back in eucalypt forest during extreme drought. New Phytol 2021; 230:1354-1365. [PMID: 33629360 DOI: 10.1111/nph.17298] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
Eastern Australia was subject to its hottest and driest year on record in 2019. This extreme drought resulted in massive canopy die-back in eucalypt forests. The role of hydraulic failure and tree size on canopy die-back in three eucalypt tree species during this drought was examined. We measured pre-dawn and midday leaf water potential (Ψleaf ), per cent loss of stem hydraulic conductivity and quantified hydraulic vulnerability to drought-induced xylem embolism. Tree size and tree health was also surveyed. Trees with most, or all, of their foliage dead exhibited high rates of native embolism (78-100%). This is in contrast to trees with partial canopy die-back (30-70% canopy die-back: 72-78% native embolism), or relatively healthy trees (little evidence of canopy die-back: 25-31% native embolism). Midday Ψleaf was significantly more negative in trees exhibiting partial canopy die-back (-2.7 to -6.3 MPa), compared with relatively healthy trees (-2.1 to -4.5 MPa). In two of the species the majority of individuals showing complete canopy die-back were in the small size classes. Our results indicate that hydraulic failure is strongly associated with canopy die-back during drought in eucalypt forests. Our study provides valuable field data to help constrain models predicting mortality risk.
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Affiliation(s)
- Rachael H Nolan
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- Bushfire Risk Management Research Hub, Wollongong, NSW, 2522, Australia
| | - Alice Gauthey
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Adriano Losso
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- Department of Botany, University of Innsbruck, Sternwartestraße 15, Innsbruck, 6020, Austria
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Rhiannon Smith
- Ecosystem Management, University of New England, Armidale, NSW, 2351, Australia
| | - Shubham S Chhajed
- Department of Biological Sciences, Macquarie University, Macquarie Park, NSW, 2109, Australia
| | - Kathryn Fuller
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- Bushfire Risk Management Research Hub, Wollongong, NSW, 2522, Australia
| | - Magnolia Song
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Xine Li
- Department of Biological Sciences, Macquarie University, Macquarie Park, NSW, 2109, Australia
- Department of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Linda J Beaumont
- Department of Biological Sciences, Macquarie University, Macquarie Park, NSW, 2109, Australia
| | - Matthias M Boer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- Bushfire Risk Management Research Hub, Wollongong, NSW, 2522, Australia
| | - Ian J Wright
- Department of Biological Sciences, Macquarie University, Macquarie Park, NSW, 2109, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
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24
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López R, Cano FJ, Martin-StPaul NK, Cochard H, Choat B. Coordination of stem and leaf traits define different strategies to regulate water loss and tolerance ranges to aridity. New Phytol 2021; 230:497-509. [PMID: 33452823 DOI: 10.1111/nph.17185] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 12/31/2020] [Indexed: 06/12/2023]
Abstract
Adaptation to drought involves complex interactions of traits that vary within and among species. To date, few data are available to quantify within-species variation in functional traits and they are rarely integrated into mechanistic models to improve predictions of species response to climate change. We quantified intraspecific variation in functional traits of two Hakea species growing along an aridity gradient in southeastern Australia. Measured traits were later used to parameterise the model SurEau to simulate a transplantation experiment to identify the limits of drought tolerance. Embolism resistance varied between species but not across populations. Instead, populations adjusted to drier conditions via contrasting sets of trait trade-offs that facilitated homeostasis of plant water status. The species from relatively mesic climate, Hakea dactyloides, relied on tight stomatal control whereas the species from xeric climate, Hakea leucoptera dramatically increased Huber value and leaf mass per area, while leaf area index (LAI) and epidermal conductance (gmin ) decreased. With trait variability, SurEau predicts the plasticity of LAI and gmin buffers the impact of increasing aridity on population persistence. Knowledge of within-species variability in multiple drought tolerance traits will be crucial to accurately predict species distributional limits.
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Affiliation(s)
- Rosana López
- Departamento de Sistemas y Recursos Naturales, Universidad Politécnica de Madrid, Madrid, 28040, Spain
| | - Francisco Javier Cano
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | | | - Hervé Cochard
- Université Clermont-Auvergne, INRA, PIAF, Clermont-Ferrand, 63000, France
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
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25
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Gauthey A, Peters JMR, Carins-Murphy MR, Rodriguez-Dominguez CM, Li X, Delzon S, King A, López R, Medlyn BE, Tissue DT, Brodribb TJ, Choat B. Visual and hydraulic techniques produce similar estimates of cavitation resistance in woody species. New Phytol 2020; 228:884-897. [PMID: 32542732 DOI: 10.1111/nph.16746] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 06/02/2020] [Indexed: 05/24/2023]
Abstract
Hydraulic failure of the plant vascular system is a principal cause of forest die-off under drought. Accurate quantification of this process is essential to our understanding of the physiological mechanisms underpinning plant mortality. Imaging techniques increasingly are applied to estimate xylem cavitation resistance. These techniques allow for in situ measurement of embolism formation in real time, although the benefits and trade-offs associated with different techniques have not been evaluated in detail. Here we compare two imaging methods, microcomputed tomography (microCT) and optical vulnerability (OV), to standard hydraulic methods for measurement of cavitation resistance in seven woody species representing a diversity of major phylogenetic and xylem anatomical groups. Across the seven species, there was strong agreement between cavitation resistance values (P50 ) estimated from visualization techniques (microCT and OV) and between visual techniques and hydraulic techniques. The results indicate that visual techniques provide accurate estimates of cavitation resistance and the degree to which xylem hydraulic function is impacted by embolism. Results are discussed in the context of trade-offs associated with each technique and possible causes of discrepancy between estimates of cavitation resistance provided by visual and hydraulic techniques.
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Affiliation(s)
- Alice Gauthey
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, 2753, Australia
| | - Jennifer M R Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, 2753, Australia
| | - Madeline R Carins-Murphy
- School of Biological Sciences, University of Tasmania, Private Bag 55, Hobart, Tas, 7001, Australia
| | - Celia M Rodriguez-Dominguez
- School of Biological Sciences, University of Tasmania, Private Bag 55, Hobart, Tas, 7001, Australia
- Irrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS, CSIC), Avenida Reina Mercedes, 10, Sevilla, 41012, Spain
| | - Ximeng Li
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, 2753, Australia
| | - Sylvain Delzon
- UMR BIOGECO, INRA, Univ Bordeaux, Talence, 33450, France
| | - Andrew King
- L'Orme de Merisiers, Synchrotron SOLEIL, 91190 Saint-Aubin-BP48, Gif-sur-Yvette Cedex, France
| | - Rosana López
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, 2753, Australia
- Departamento de Sistemas y Recursos Naturales, Universidad Politécnica de Madrid, Madrid, Spain
- PIAF, INRA, University of Clermont-Auvergne, 63100, Clermont-Ferrand, France
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, 2753, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, 2753, Australia
| | - Tim J Brodribb
- School of Biological Sciences, University of Tasmania, Private Bag 55, Hobart, Tas, 7001, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, 2753, Australia
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26
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Peters JMR, Gauthey A, Lopez R, Carins-Murphy MR, Brodribb TJ, Choat B. Non-invasive imaging reveals convergence in root and stem vulnerability to cavitation across five tree species. J Exp Bot 2020; 71:6623-6637. [PMID: 32822502 PMCID: PMC7586747 DOI: 10.1093/jxb/eraa381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 08/18/2020] [Indexed: 05/08/2023]
Abstract
Root vulnerability to cavitation is challenging to measure and under-represented in current datasets. This gap limits the precision of models used to predict plant responses to drought because roots comprise the critical interface between plant and soil. In this study, we measured vulnerability to drought-induced cavitation in woody roots and stems of five tree species (Acacia aneura, Cedrus deodara, Eucalyptus crebra, Eucalytus saligna, and Quercus palustris) with a wide range of xylem anatomies. X-ray microtomography was used to visualize the accumulation of xylem embolism in stems and roots of intact plants that were naturally dehydrated to varying levels of water stress. Vulnerability to cavitation, defined as the water potential causing a 50% loss of hydraulic function (P50), varied broadly among the species (-4.51 MPa to -11.93 MPa in stems and -3.13 MPa to -9.64 MPa in roots). The P50 of roots and stems was significantly related across species, with species that had more vulnerable stems also having more vulnerable roots. While there was strong convergence in root and stem vulnerability to cavitation, the P50 of roots was significantly higher than the P50 of stems in three species. However, the difference in root and stem vulnerability for these species was small; between 1% and 31% of stem P50. Thus, while some differences existed between organs, roots were not dramatically more vulnerable to embolism than stems, and the differences observed were less than those reported in previous studies. Further study is required to evaluate the vulnerability across root orders and to extend these conclusions to a greater number of species and xylem functional types.
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Affiliation(s)
- Jennifer M R Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- Oak Ridge National Laboratory, Climate Change Science Institute & Environmental Science Division, Oak Ridge, TN, USA
| | - Alice Gauthey
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Rosana Lopez
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- Departamento de Sistemas y Recursos Naturales. Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | | | - Timothy J Brodribb
- School of Biological Sciences, University of Tasmania, Hobart, TAS, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
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27
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De Kauwe MG, Medlyn BE, Ukkola AM, Mu M, Sabot MEB, Pitman AJ, Meir P, Cernusak LA, Rifai SW, Choat B, Tissue DT, Blackman CJ, Li X, Roderick M, Briggs PR. Identifying areas at risk of drought-induced tree mortality across South-Eastern Australia. Glob Chang Biol 2020; 26:5716-5733. [PMID: 32512628 DOI: 10.1111/gcb.15215] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
South-East Australia has recently been subjected to two of the worst droughts in the historical record (Millennium Drought, 2000-2009 and Big Dry, 2017-2019). Unfortunately, a lack of forest monitoring has made it difficult to determine whether widespread tree mortality has resulted from these droughts. Anecdotal observations suggest the Big Dry may have led to more significant tree mortality than the Millennium drought. Critically, to be able to robustly project future expected climate change effects on Australian vegetation, we need to assess the vulnerability of Australian trees to drought. Here we implemented a model of plant hydraulics into the Community Atmosphere Biosphere Land Exchange (CABLE) land surface model. We parameterized the drought response behaviour of five broad vegetation types, based on a common garden dry-down experiment with species originating across a rainfall gradient (188-1,125 mm/year) across South-East Australia. The new hydraulics model significantly improved (~35%-45% reduction in root mean square error) CABLE's previous predictions of latent heat fluxes during periods of water stress at two eddy covariance sites in Australia. Landscape-scale predictions of the greatest percentage loss of hydraulic conductivity (PLC) of about 40%-60%, were broadly consistent with satellite estimates of regions of the greatest change in both droughts. In neither drought did CABLE predict that trees would have reached critical PLC in widespread areas (i.e. it projected a low mortality risk), although the model highlighted critical levels near the desert regions of South-East Australia where few trees live. Overall, our experimentally constrained model results imply significant resilience to drought conferred by hydraulic function, but also highlight critical data and scientific gaps. Our approach presents a promising avenue to integrate experimental data and make regional-scale predictions of potential drought-induced hydraulic failure.
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Affiliation(s)
- Martin G De Kauwe
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
- Evolution & Ecology Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Anna M Ukkola
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia
- Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
| | - Mengyuan Mu
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Manon E B Sabot
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
- Evolution & Ecology Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Andrew J Pitman
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Patrick Meir
- Research School of Biology, The Australian National University, Acton, ACT, Australia
- School of Geosciences, University of Edinburgh, Edinburgh, UK
| | - Lucas A Cernusak
- College of Science and Engineering, James Cook University, Cairns, Qld, Australia
| | - Sami W Rifai
- Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Ximeng Li
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Michael Roderick
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia
- Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
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28
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Johnson KM, Brodersen C, Carins-Murphy MR, Choat B, Brodribb TJ. Xylem Embolism Spreads by Single-Conduit Events in Three Dry Forest Angiosperm Stems. Plant Physiol 2020; 184:212-222. [PMID: 32581116 PMCID: PMC7479884 DOI: 10.1104/pp.20.00464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/15/2020] [Indexed: 05/02/2023]
Abstract
Xylem cavitation resulting in air embolism is a major cause of plant death during drought, yet the spread of embolism throughout the plant water transport system is poorly understood. Our study used optical visualization and x-ray microcomputed tomography imaging to capture the spread of emboli in stems of three drought-resistant angiosperm trees: drooping she-oak (Allocasuarina verticillata), black wattle (Acacia mearnsii), and blue gum (Eucalyptus globulus). These species have similar degrees of xylem network connectivity (vessel grouping) with largely solitary vessels. The high temporal resolution of the optical vulnerability technique revealed that in current year branches, >80% of the cavitation events were discrete, temporally separated events in single vessels. This suggests that in xylem networks with low connectivity, embolism spread between conduits leading to multiple conduit cavitation events is uncommon. A. mearnsii showed both the highest number of multivessel cavitation events and the highest degree of vessel connectivity, suggesting a link between vessel arrangement and embolism spread. Knowledge of embolism spread will help us to uncover the links between xylem anatomy, arrangement, and the path of water flow in the xylem in diverse species to ultimately understand the drivers of cavitation and plant vulnerability to drought.
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Affiliation(s)
- Kate M Johnson
- Discipline of Biological Sciences, School of Natural Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Craig Brodersen
- School of Forestry and Environmental Studies, Yale University, New Haven, Connecticut 06511
| | - Madeline R Carins-Murphy
- Discipline of Biological Sciences, School of Natural Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales 2750, Australia
| | - Timothy J Brodribb
- Discipline of Biological Sciences, School of Natural Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
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29
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Affiliation(s)
- Timothy J. Brodribb
- School of Biological Sciences, University of Tasmania, Hobart, TAS 7001, Australia
| | - Jennifer Powers
- Departments of Ecology, Evolution and Behavior and Plant and Microbial Biology, University of Minnesota, 140 Gortner Laboratory, Saint Paul, MN 55108, USA
| | - Hervé Cochard
- Université Clermont Auvergne, INRAE, PIAF, 63000 Clermont-Ferrand, France
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
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30
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Li X, Smith R, Choat B, Tissue DT. Drought resistance of cotton (Gossypium hirsutum) is promoted by early stomatal closure and leaf shedding. Funct Plant Biol 2020; 47:91-98. [PMID: 31825787 DOI: 10.1071/fp19093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 09/06/2019] [Indexed: 05/11/2023]
Abstract
Water relations have been well documented in tree species, but relatively little is known about the hydraulic characteristics of crops. Here, we report on the hydraulic strategy of cotton (Gossypium hirsutum L.). Leaf gas exchange and in vivo embolism formation were monitored simultaneously on plants that were dried down in situ under controlled environment conditions, and xylem vulnerability to embolism of leaves, stems and roots was measured using intact plants. Water potential inducing 50% embolised vessels (P50) in leaves was significantly higher (less negative) than P50 of stems and roots, suggesting that leaves were the most vulnerable organ to embolism. Furthermore, the water potential generating stomatal closure (Pgs) was higher than required to generate embolism formation, and complete stomatal closure always preceded the onset of embolism with declining soil water content. Although protracted drought resulted in massive leaf shedding, stem embolism remained minimal even after ~90% leaf area was lost. Overall, cotton maintained hydraulic integrity during long-term drought stress through early stomatal closure and leaf shedding, thus exhibiting a drought avoidance strategy. Given that water potentials triggering xylem embolism are uncommon under field conditions, cotton is unlikely to experience hydraulic dysfunction except under extreme climates. Results of this study provide physiological evidence for drought resistance in cotton with regard to hydraulics, and may provide guidance in developing irrigation schedules during periods of water shortage.
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Affiliation(s)
- Ximeng Li
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Renee Smith
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; and Corresponding author.
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31
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Kattge J, Bönisch G, Díaz S, Lavorel S, Prentice IC, Leadley P, Tautenhahn S, Werner GDA, Aakala T, Abedi M, Acosta ATR, Adamidis GC, Adamson K, Aiba M, Albert CH, Alcántara JM, Alcázar C C, Aleixo I, Ali H, Amiaud B, Ammer C, Amoroso MM, Anand M, Anderson C, Anten N, Antos J, Apgaua DMG, Ashman TL, Asmara DH, Asner GP, Aspinwall M, Atkin O, Aubin I, Baastrup-Spohr L, Bahalkeh K, Bahn M, Baker T, Baker WJ, Bakker JP, Baldocchi D, Baltzer J, Banerjee A, Baranger A, Barlow J, Barneche DR, Baruch Z, Bastianelli D, Battles J, Bauerle W, Bauters M, Bazzato E, Beckmann M, Beeckman H, Beierkuhnlein C, Bekker R, Belfry G, Belluau M, Beloiu M, Benavides R, Benomar L, Berdugo-Lattke ML, Berenguer E, Bergamin R, Bergmann J, Bergmann Carlucci M, Berner L, Bernhardt-Römermann M, Bigler C, Bjorkman AD, Blackman C, Blanco C, Blonder B, Blumenthal D, Bocanegra-González KT, Boeckx P, Bohlman S, Böhning-Gaese K, Boisvert-Marsh L, Bond W, Bond-Lamberty B, Boom A, Boonman CCF, Bordin K, Boughton EH, Boukili V, Bowman DMJS, Bravo S, Brendel MR, Broadley MR, Brown KA, Bruelheide H, Brumnich F, Bruun HH, Bruy D, Buchanan SW, Bucher SF, Buchmann N, Buitenwerf R, Bunker DE, Bürger J, Burrascano S, Burslem DFRP, Butterfield BJ, Byun C, Marques M, Scalon MC, Caccianiga M, Cadotte M, Cailleret M, Camac J, Camarero JJ, Campany C, Campetella G, Campos JA, Cano-Arboleda L, Canullo R, Carbognani M, Carvalho F, Casanoves F, Castagneyrol B, Catford JA, Cavender-Bares J, Cerabolini BEL, Cervellini M, Chacón-Madrigal E, Chapin K, Chapin FS, Chelli S, Chen SC, Chen A, Cherubini P, Chianucci F, Choat B, Chung KS, Chytrý M, Ciccarelli D, Coll L, Collins CG, Conti L, Coomes D, Cornelissen JHC, Cornwell WK, Corona P, Coyea M, Craine J, Craven D, Cromsigt JPGM, Csecserits A, Cufar K, Cuntz M, da Silva AC, Dahlin KM, Dainese M, Dalke I, Dalle Fratte M, Dang-Le AT, Danihelka J, Dannoura M, Dawson S, de Beer AJ, De Frutos A, De Long JR, Dechant B, Delagrange S, Delpierre N, Derroire G, Dias AS, 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M, Walther G, Wang H, Wang F, Wang W, Watkins H, Watkins J, Weber U, Weedon JT, Wei L, Weigelt P, Weiher E, Wells AW, Wellstein C, Wenk E, Westoby M, Westwood A, White PJ, Whitten M, Williams M, Winkler DE, Winter K, Womack C, Wright IJ, Wright SJ, Wright J, Pinho BX, Ximenes F, Yamada T, Yamaji K, Yanai R, Yankov N, Yguel B, Zanini KJ, Zanne AE, Zelený D, Zhao YP, Zheng J, Zheng J, Ziemińska K, Zirbel CR, Zizka G, Zo-Bi IC, Zotz G, Wirth C. TRY plant trait database - enhanced coverage and open access. Glob Chang Biol 2020; 26:119-188. [PMID: 31891233 DOI: 10.1111/gcb.14904] [Citation(s) in RCA: 472] [Impact Index Per Article: 118.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 09/12/2019] [Indexed: 05/17/2023]
Abstract
Plant traits-the morphological, anatomical, physiological, biochemical and phenological characteristics of plants-determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait-based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best species coverage is achieved for categorical traits-almost complete coverage for 'plant growth form'. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait-environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives.
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Affiliation(s)
- Jens Kattge
- Max Planck Institute for Biogeochemistry, Jena, Germany
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | | | - Sandra Díaz
- Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto Multidisciplinario de Biología Vegetal (IMBIV), and Factulad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Sandra Lavorel
- Univ. Grenoble Alpes, CNRS, Univ. Savoie Mont Blanc, LECA, Grenoble, France
| | | | - Paul Leadley
- Ecologie Systématique Evolution, CNRS, AgroParisTech, University of Paris-Sud, Université Paris-Saclay, Orsay, France
| | | | - Gijsbert D A Werner
- Department of Zoology, University of Oxford, Oxford, UK
- Balliol College, University of Oxford, Oxford, UK
| | | | - Mehdi Abedi
- Department of Range Management, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran
| | | | - George C Adamidis
- Biodiversity Conservation Laboratory, Department of Environment, University of the Aegean, Mytilene, Greece
- Institute of Ecology and Evolution, University of Bern, Bern, Switzerland
| | - Kairi Adamson
- Tartu Observatory, University of Tartu, Tartumaa, Estonia
| | - Masahiro Aiba
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Cécile H Albert
- Aix Marseille Univ, Univ Avignon, CNRS, IRD, IMBE, Marseille, France
| | | | | | - Izabela Aleixo
- National Institute of Amazonian Research (INPA), Manaus, Brazil
| | - Hamada Ali
- Botany Department, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | | | - Christian Ammer
- Forest Sciences, University of Göttingen, Göttingen, Germany
- Centre for Biodiversity and Sustainable Land-use, University of Göttingen, Göttingen, Germany
| | - Mariano M Amoroso
- Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural (IRNAD), Universidad Nacional de Río Negro, El Bolsón, Argentina
- Conicet-Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | | | - Carolyn Anderson
- Pacific Northwest National Laboratory, Richland, WA, USA
- University of Massachusetts Amherst, Amherst, MA, USA
| | - Niels Anten
- Centre for Crop Systems Analysis, Wageningen University, Wageningen, The Netherlands
| | | | | | | | - Degi Harja Asmara
- Centre for Forest Research, Institute for Integrative Systems Biology, Université Laval, Quebec, QC, Canada
| | | | - Michael Aspinwall
- Department of Biology, University of North Florida, Jacksonville, FL, USA
| | - Owen Atkin
- ARC Centre for Excellence in Plant Energy Biology, Australian National University, Acton, ACT, Australia
| | - Isabelle Aubin
- Great Lakes Forestry Centre, Canadian Forest Service, Natural Resources Canada, Sault Ste. Marie, ON, Canada
| | | | - Khadijeh Bahalkeh
- Department of Range Management, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran
| | - Michael Bahn
- Department of Ecology, University of Innsbruck, Innsbruck, Austria
| | | | | | - Jan P Bakker
- Conservation Ecology, Groningen Institute for Evolutionary Life Sciences (GELIFES), University of Groningen, Groningen, The Netherlands
| | - Dennis Baldocchi
- Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, CA, USA
| | - Jennifer Baltzer
- Biology Department, Wilfrid Laurier University, Waterloo, ON, Canada
| | - Arindam Banerjee
- Department of Forest Resources, University of Minnesota, St. Paul, MN, USA
| | | | - Jos Barlow
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - Diego R Barneche
- College of Life and Environmental Sciences, University of Exeter, Penryn, UK
| | - Zdravko Baruch
- School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Denis Bastianelli
- CIRAD, UMR SELMET, Montpellier, France
- SELMET, CIRAD, INRA, Univ Montpellier, Montpellier SupAgro, France
| | - John Battles
- University of California at Berkeley, Berkeley, CA, USA
| | - William Bauerle
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO, USA
| | - Marijn Bauters
- Department of Green Chemistry and Technology, Ghent University, Gent, Belgium
- Department of Environment, Ghent University, Gent, Belgium
| | - Erika Bazzato
- Department of Life and Environmental Sciences, Botany Division, University of Cagliari, Cagliari, Italy
| | - Michael Beckmann
- Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | | | | | - Renee Bekker
- Groningen Institute of Archaeology (GIA), University of Groningen, Groningen, The Netherlands
| | - Gavin Belfry
- Department of Biological Sciences, University of Tennessee, Knoxville, TN, USA
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
| | - Michael Belluau
- Département des Science, Université du Québec À Montréal, Montreal, QC, Canada
| | - Mirela Beloiu
- Department of Biogeography, University of Bayreuth, Bayreuth, Germany
| | | | | | - Mary Lee Berdugo-Lattke
- Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogota, Colombia
- Fundación Natura, Bogota, Colombia
| | - Erika Berenguer
- Environmental Change Institute, University of Oxford, Oxford, UK
| | - Rodrigo Bergamin
- Laboratório de Estudos em Vegetação Campestre (LEVCamp), Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Joana Bergmann
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Marcos Bergmann Carlucci
- Laboratório de Ecologia Funcional de Comunidades (LABEF), Departamento de Botânica, Universidade Federal do Paraná, Curitiba, Brazil
| | - Logan Berner
- School of Informatics, Computing, and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA
| | | | | | - Anne D Bjorkman
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Chris Blackman
- PIAF, INRA, Université Clermont-Auvergne, Clermont-Ferrand, France
| | - Carolina Blanco
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Benjamin Blonder
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Dana Blumenthal
- USDA-ARS Rangeland Resources & Systems Research Unit, Fort Collins, CO, USA
| | - Kelly T Bocanegra-González
- Grupo de Investigación en Biodiversidad y Dinámica de Ecosistémas Tropicales - Universidad del Tolima, Ibagué, Colombia
| | - Pascal Boeckx
- Isotope Bioscience Laboratory - ISOFYS, Ghent University, Gent, Belgium
| | - Stephanie Bohlman
- School of Forest Resources and Conservation, University of Florida, Gainesville, FL, USA
| | - Katrin Böhning-Gaese
- Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
- Department of Biological Sciences, Goethe Universität Frankfurt, Frankfurt am Main, Germany
| | - Laura Boisvert-Marsh
- Great Lakes Forestry Centre, Canadian Forest Service, Natural Resources Canada, Sault Ste. Marie, ON, Canada
| | - William Bond
- Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
- SAEON Fynbos Node, Claremont, South Africa
| | | | - Arnoud Boom
- School of Geography, Geology and Environment, University of Leicester, Leicester, UK
| | - Coline C F Boonman
- Department of Environmental Science, Institute for Water and Wetland Research, Radboud University, Nijmegen, The Netherlands
| | - Kauane Bordin
- Laboratório de Ecologia Vegetal (LEVEG), Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Vanessa Boukili
- Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT, USA
| | | | - Sandra Bravo
- Facultad de Ciencias Forestales, Universidad Nacional de Santiago del Estero, Santiago del Estero, Argentina
| | - Marco Richard Brendel
- Institute of Landscape and Plant Ecology, University of Hohenheim, Stuttgart, Germany
| | | | - Kerry A Brown
- Department of Geography and Geology, Kingston University, Kingston upon Thames, UK
| | - Helge Bruelheide
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Federico Brumnich
- Conicet-Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
- Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral (FICH-UNL), Santa Fe, Argentina
| | - Hans Henrik Bruun
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - David Bruy
- AMAP, CIRAD, CNRS, IRD, INRA, Université de Montpellier, Montpellier, France
- AMAP, IRD, Herbier de Nouvelle-Calédonie, Nouméa, New Caledonia
| | | | | | | | - Robert Buitenwerf
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
- Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Bioscience, Aarhus University, Aarhus, Denmark
| | | | - Jana Bürger
- Faculty of Agricultural and Environmental Sciences, University of Rostock, Rostock, Germany
| | | | | | - Bradley J Butterfield
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA
| | - Chaeho Byun
- School of Civil and Environmental Engineering, Yonsei University, Seoul, Korea
| | - Marcia Marques
- Departamento de Botânica, SCB, UFPR - Federal University of Parana, Curitiba, Brazil
| | - Marina C Scalon
- Centro Politécnico, Universidade Federal do Paraná, Curitiba, Brazil
| | - Marco Caccianiga
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milano, Italy
| | - Marc Cadotte
- University of Toronto Scarborough, Scarborough, ON, Canada
| | - Maxime Cailleret
- IRSTEA Aix-en-Provence, UMR RECOVER, Aix-Marseille University, Aix-en-Provence, France
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
| | - James Camac
- Centre of Excellence for Bioscurity Risk Analysis, The University of Melbourne, Melbourne, Vic., Australia
| | | | | | - Giandiego Campetella
- School of Biosciences and Veterinary Medicine, Plant Diversity and Ecosystems Management Unit, University of Camerino, Camerino, Italy
| | - Juan Antonio Campos
- Department of Plant Biology and Ecology, University of the Basque Country UPV/EHU, Bilbao, Spain
| | - Laura Cano-Arboleda
- Fundación Natura, Bogota, Colombia
- Departamento de Geociencias y Medio Ambiente, Universidad Nacional de Colombia, Medellin, Colombia
| | - Roberto Canullo
- School of Biosciences and Veterinary Medicine, Plant Diversity and Ecosystems Management Unit, University of Camerino, Camerino, Italy
| | - Michele Carbognani
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Fabio Carvalho
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - Fernando Casanoves
- CATIE-Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba, Costa Rica
| | | | - Jane A Catford
- Department of Geography, King's College London, London, UK
| | | | - Bruno E L Cerabolini
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Marco Cervellini
- School of Biosciences and Veterinary Medicine, Plant Diversity and Ecosystems Management Unit, University of Camerino, Camerino, Italy
- BIGEA, Department of Biological, Geological and Environmental Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
| | | | | | - F Stuart Chapin
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Stefano Chelli
- School of Biosciences and Veterinary Medicine, Plant Diversity and Ecosystems Management Unit, University of Camerino, Camerino, Italy
| | | | - Anping Chen
- Department of Biology, Colorado State University, Fort Collins, CO, USA
| | - Paolo Cherubini
- WSL Swiss Federal Research Institute, Birmensdorf, Switzerland
- Faculty of Forestry, University of British Columbia, Vancouver, BC, Canada
| | | | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | | | - Milan Chytrý
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | | | - Lluís Coll
- Department of Agriculture and Forest Engineering (EAGROF), University of Lleida, Lleida, Spain
- Joint Research Unit CTFC - AGROTECNIO, Solsona, Spain
| | | | - Luisa Conti
- Faculty of Environmental Sciences, University of Life Sciences Prague, Praha-Suchdol, Czech Republic
- Institute of Botany, Czech Academy of Sciences, Třeboň, Czech Republic
| | - David Coomes
- Department of Plant Sciences, University of Cambridge, Cambridge, UK
| | - Johannes H C Cornelissen
- Systems Ecology, Department of Ecological Science, Vrije Universiteit, Amsterdam, The Netherlands
| | - William K Cornwell
- School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
| | | | - Marie Coyea
- Faculté de foresterie, de géographie et de géomatique, Université Laval, Quebec, QC, Canada
| | | | - Dylan Craven
- Centro de Modelación y Monitoreo de Ecosistemas, Universidad Mayor, Santiago, Chile
| | - Joris P G M Cromsigt
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden
- Centre for African Conservation Ecology, Department of Zoology, Nelson Mandela University, Port Elizabeth, South Africa
| | | | - Katarina Cufar
- Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Matthias Cuntz
- Université de Lorraine, AgroParisTech, INRAE, UMR Silva, Nancy, France
| | | | - Kyla M Dahlin
- Department of Geography, Environment, and Spatial Sciences, Michigan State University, East Lansing, MI, USA
| | - Matteo Dainese
- Eurac Research, Institute for Alpine Environment, Bozen-Bolzano, Italy
| | - Igor Dalke
- Institute of Biology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Komi Republic, Russia
| | - Michele Dalle Fratte
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Anh Tuan Dang-Le
- University of Science - Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Jirí Danihelka
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
- Institute of Botany, Czech Academy of Sciences, Třeboň, Czech Republic
| | - Masako Dannoura
- Graduate School of Agriculture, Kyoto University, Kyoto, Japan
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
| | - Samantha Dawson
- Swedish Species Information Centre, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Arend Jacobus de Beer
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
| | - Angel De Frutos
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Jonathan R De Long
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Wageningen, The Netherlands
| | - Benjamin Dechant
- Department Computational Landscape Ecology, UFZ - Helmholtz Centre for Environmental Research, Leipzig, Germany
- Department Computational Hydrosystems, UFZ - Helmholtz Centre for Environmental Research, Leipzig, Germany
- Department of Landscape Architecture and Rural Systems Engineering, Seoul National University, Seoul, Republic of Korea
| | - Sylvain Delagrange
- Institute of Temperate Forest Sciences (ISFORT), Ripon, QC, Canada
- UQO, Department of Natural Sciences, Ripon, QC, Canada
| | - Nicolas Delpierre
- Ecologie Systématique Evolution, CNRS, AgroParisTech, University of Paris-Sud, Université Paris-Saclay, Orsay, France
| | - Géraldine Derroire
- Cirad, UMR EcoFoG (Agroparistech, CNRS, INRA, Université des Antilles, Université de la Guyane), Kourou, French Guiana, France
| | - Arildo S Dias
- Institut für Physische Geographie, Biogeography and Biodiversity Lab, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
| | | | | | - Mark Dobrowolski
- Iluka Resources, Perth, WA, Australia
- School of Biological Sciences, The University of Western Australia, Perth, WA, Australia
| | - Daniel Doktor
- Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Pavel Dřevojan
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | - Ning Dong
- Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia
| | | | - Stefan Dressler
- Department of Botany and Molecular Evolution, Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany
| | - Leandro Duarte
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Emilie Ducouret
- Cirad, UMR EcoFoG (Agroparistech, CNRS, INRA, Université des Antilles, Université de la Guyane), Kourou, French Guiana, France
| | - Stefan Dullinger
- Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | - Walter Durka
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Helmholtz Centre for Environmental Research - UFZ, Halle, Germany
| | - Remko Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | - Olga Dymova
- Institute of Biology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Komi Republic, Russia
| | - Anna E-Vojtkó
- Institute of Botany, Czech Academy of Sciences, Třeboň, Czech Republic
- Department of Botany, Faculty of Sciences, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Rolf Lutz Eckstein
- Department of Environmental and Life Sciences - Biology, Karlstad University, Karlstad, Sweden
| | - Hamid Ejtehadi
- Quantitative Plant Ecology and Biodiversity Research Laboratory, Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - James Elser
- Flathead Lake Biological Station, University of Montana, Polson, MT, USA
- School of Sustainability, Arizona State University, Tempe, AZ, USA
| | - Thaise Emilio
- Programa Nacional de Pós-Doutorado (PNPD), Programa de Pós Graduação em Ecologia, Institute of Biology, University of Campinas UNICAMP, Brazil
| | - Kristine Engemann
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
| | - Mohammad Bagher Erfanian
- Quantitative Plant Ecology and Biodiversity Research Laboratory, Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Alexandra Erfmeier
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute for Ecosystem Research/Geobotany, Kiel University, Kiel, Germany
| | - Adriane Esquivel-Muelbert
- School of Geography, University of Leeds, Leeds, UK
- School of Geography, Earth and Environmental Sciences - University of Birmingham, Birmingham, UK
| | - Gerd Esser
- Institute for Plant Ecology, Justus Liebig University, Giessen, Germany
| | - Marc Estiarte
- Spanish National Research Council - CSIC, Catalonia, Spain
- CREAF, Catalonia, Spain
| | | | | | - Jaime Fagúndez
- Campus da Zapateira, University of A Coruña, A Coruña, Spain
| | - Daniel S Falster
- Evolution & Ecology Research Centre, and School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Ying Fan
- Rutgers University, Piscataway, NJ, USA
| | | | - Emmanuele Farris
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - Fatih Fazlioglu
- Faculty of Arts and Sciences, Molecular Biology and Genetics, Ordu University, Ordu, Turkey
| | - Yanhao Feng
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Fernando Fernandez-Mendez
- Grupo de Investigación en Biodiversidad y Dinámica de Ecosistémas Tropicales - Universidad del Tolima, Ibagué, Colombia
- Centro Forestal Tropical Bajo Calima, Universidad del Tolima, Buenaventura, Colombia
| | | | | | - Alessandra Fidelis
- Instituto de Biociências, Laboratory of Vegetation Ecology, Universidade Estadual Paulista (UNESP), Rio Claro, Brazil
| | - Bryan Finegan
- CATIE-Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba, Costa Rica
| | - Jennifer Firn
- Queensland University of Technology (QUT), Brisbane, Australia
| | | | - Dan F B Flynn
- Arnold Arboretum of Harvard University, Boston, MA, USA
| | - Veronika Fontana
- Eurac Research, Institute for Alpine Environment, Bozen-Bolzano, Italy
| | - Estelle Forey
- Laboratoire ECODIV URA, IRSTEA/EA 1293, Normandie Université, UFR ST, Université de Rouen, Mont Saint-Aignan, France
| | - Cristiane Forgiarini
- Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Louis François
- Unit of Research SPHERES, University of Liège, Liège, Belgium
| | - Marcelo Frangipani
- University of Guelph, Guelph, ON, Canada
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | - Grégoire T Freschet
- Theoretical and Experimental Ecology Station, CNRS, Paul Sabatier University Toulouse, Moulis, France
| | - Ellen L Fry
- School of Earth and Environment Science, University of Manchester, Manchester, UK
| | - Nikolaos M Fyllas
- Biodiversity Conservation Laboratory, Department of Environment, University of the Aegean, Mytilene, Greece
| | - Guilherme G Mazzochini
- Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - Sophie Gachet
- Aix Marseille Univ, Univ Avignon, CNRS, IRD, IMBE, Marseille, France
| | - Rachael Gallagher
- Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia
| | - Gislene Ganade
- Universidade Federal do Rio Grande do Norte - UFRN, Natal, RN, Brazil
| | - Francesca Ganga
- Department of Life and Environmental Sciences, Botany Division, University of Cagliari, Cagliari, Italy
| | - Pablo García-Palacios
- Departamento de Biología y Geología, Física y Química Inorgánica y Analítica, Universidad Rey Juan Carlos, Móstoles, Spain
| | - Verónica Gargaglione
- Instituto Nacional de Tecnología Agropecuaria, Consejo Nacional de Invetigaciones Científicas y Técnicas, Universidad Nacional de La Patagonia Austral, Río Gallegos, Argentina
| | - Eric Garnier
- UMR 5175 CEFE, Univ. Montpellier, CNRS, EPHE, IRD, Univ. Paul Valéry, Montpellier, France
| | - Jose Luis Garrido
- Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas, Sevilla, Spain
| | | | | | - David Gibson
- School of Biological Sciences, Southern Illinois University Carbondale, Carbondale, IL, USA
| | | | - Aelton Giroldo
- Instituto Federal de Educação Ciência e Tecnologia do Ceará, Crateús, Brazil
| | | | - Sean Gleason
- Water Management and Systems Research Unit, United States Department of Agriculture, Agricultural Research Service, Fort Collins, CO, USA
| | - Mariana Gliesch
- Institute of Integrative Biology, ETH Zürich (Swiss Federal Institute of Technology), Zürich, Switzerland
| | - Emma Goldberg
- Department of Ecology, Evolution & Behavior, University of Minnesota, Minneapolis, MN, USA
| | - Bastian Göldel
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
| | | | | | - Andrés González-Melo
- Facultad de Ciencias Naturales y Matemáticas, Universidad del Rosario, Bogota, Colombia
| | - Ana González-Robles
- Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén, Jaén, Spain
| | | | - Elena Granda
- Department of Life Sciences, University of Alcalá, Alcala de Henares, Spain
| | | | - Walton A Green
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, USA
| | - Thomas Gregor
- Department of Botany and Molecular Evolution, Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany
| | - Nicolas Gross
- UCA, INRA, VetAgro Sup, UMR Ecosystème Prairial, Clermont-Ferrand, France
- Departamento de Biología y Geología, Física y Química Inorgánica, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Móstoles, Spain
| | - Greg R Guerin
- School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
| | | | - Alvaro G Gutiérrez
- Departamento de Ciencias Ambientales y Recursos Naturales Renovables, Facultad de Ciencias Agronómicas, Universidad de Chile, Santiago, Chile
| | - Lillie Haddock
- Pacific Northwest National Laboratory, Joint Global Change Research Institute, College Park, MD, USA
| | - Anna Haines
- The University of Manchester, Manchester, UK
| | - Jefferson Hall
- Smithsonian Tropical Research Institute, Balboa, Ancon, Republic of Panama
| | | | - Wenxuan Han
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
- Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, China
| | | | - Wesley Hattingh
- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Joseph E Hawes
- Applied Ecology Research Group, School of Life Sciences, Anglia Ruskin University, Cambridge, UK
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | - Tianhua He
- School of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
- College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA, Australia
| | - Pengcheng He
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | | | - Aveliina Helm
- Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
| | - Stefan Hempel
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Jörn Hentschel
- Herbarium Haussknecht, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Bruno Hérault
- Cirad, Université de Montpellier, Montpellier, France
- Institut National Polytehcnique Félix Houphouet-Boigny, INP-HB, Yamoussoukro, Ivory Coast
| | - Ana-Maria Hereş
- Department of Forest Sciences, Transilvania University of Brasov, Brasov, Romania
- BC3 - Basque Centre for Climate Change, Scientific Campus of the University of the Basque Country, Leioa, Spain
| | - Katharina Herz
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | | | - Thomas Hickler
- Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
- Department of Physical Geography, Goethe University, Frankfurt am Main, Germany
| | - Peter Hietz
- Institute of Botany, University of Natural Resources and Life Sciences, Vienna, Austria
| | | | - Andrew L Hipp
- The Morton Arboretum, Lisle, IL, USA
- The Field Museum, Chicago, IL, USA
| | | | - Maria Hock
- Institute for Ecosystem Research/Geobotany, Kiel University, Kiel, Germany
| | - James Aaron Hogan
- Department of Biological Sciences, Florida International University, Miami, FL, USA
- Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, TN
| | - Karen Holl
- University of California, Santa Cruz, Santa Cruz, CA, USA
| | - Olivier Honnay
- Plant Conservation and Population Biology, Department of Biology, KU Leuven, Leuven, Belgium
- Division of Ecology, Evolution and Biodiversity Conservation, Heverlee, Belgium
| | | | - Enqing Hou
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Nate Hough-Snee
- Four Peaks Environmental Science and Data Solutions, Wenatchee, WA, USA
| | - Knut Anders Hovstad
- Department of Landscape and Biodiversity, Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
| | | | - Boris Igić
- University of Illinois at Chicago, Chicago, IL, USA
| | - Estela Illa
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Biodiversity Research Institute (IRBio), Universitat de Barcelona, Barcelona, Spain
| | | | - Masae Ishihara
- Ashiu Forest Research Station, Field Science Education and Research Center, Kyoto University, Kyoto, Japan
| | - Leonid Ivanov
- Institute Botanic Garden, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
- Tyumen State University, Tyumen, Russia
| | - Larissa Ivanova
- Institute Botanic Garden, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
- Tyumen State University, Tyumen, Russia
| | | | - Jordi Izquierdo
- Barcelona School of Agricultural Engineering, Universitat Politècnica de Catalunya, Catalonia, Spain
| | - Robert B Jackson
- Earth System Science Department, Stanford University, Stanford, CA, USA
| | - Benjamin Jackson
- Global Academy of Agriculture and Food Security, University of Edinburgh, Midlothian, Scotland
| | | | - Andrzej M Jagodzinski
- Institute of Dendrology, Polish Academy of Sciences, Kornik, Poland
- Department of Game Management and Forest Protection, Faculty of Forestry, Poznan University of Life Sciences, Poznan, Poland
| | - Ute Jandt
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, Germany
| | - Thomas Jenkins
- Department of Zoology, University of Oxford, Oxford, UK
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
| | - Anke Jentsch
- BayCEER, Department of Disturbance Ecology, University of Bayreuth, Bayreuth, Germany
| | | | - Guo-Feng Jiang
- Plant Ecophysiology & Evolution Group, Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning, Guangxi, PR China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, PR China
| | | | | | - Eric J Jokela
- School of Forest Resources and Conservation, University of Florida, Gainesville, FL, USA
| | | | | | - Grant Stuart Joseph
- Department of Zoology, School of Mathematical and Natural Science, University of Venda, Thohoyandou, South Africa
- Department of Biological Sciences, DST/NRF Centre of Excellence, Percy FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch, South Africa
| | - Decky Junaedi
- Cibodas Botanical Garden - Indonesian Institute of Sciences (LIPI), Jl. Kebun Raya Cibodas, Cipanas, Indonesia
- Centre of Excellence for Biosecurity Risk Analysis (CEBRA), School Of Biosciences, University of Melbourne, Parkville, Vic., Australia
| | - Robert R Junker
- Evolutionary Ecology of Plants, Department Biology, Philipps-University Marburg, Marburg, Germany
- Department of Bioscience, University Salzburg, Salzburg, Austria
| | - Eric Justes
- PERSYST Department, CIRAD, Montpellier Cedex 5, France
| | - Richard Kabzems
- BC Ministry Forest, Lands, Natural Resource Operations and Rural Development, Dawson Creek, BC, Canada
| | | | - Zdenek Kaplan
- Institute of Botany, The Czech Academy of Sciences, Prùhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic
| | - Teja Kattenborn
- Institute of Geography and Geoecology, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | | | - Elizabeth Kearsley
- CAVElab - Computational and Applied Vegetation Ecology, Ghent University, Ghent, Belgium
| | - Anne Kempel
- Institute of Plant Sciences, Bern, Switzerland
| | - Tanaka Kenzo
- Forestry and Forest Products Research Institute, Tsukuba, Japan
| | | | - Mohammed I Khalil
- Department of Biology, University of Garmian, Kalar, Iraq
- School of Biological Sciences and Center for Ecology, Southern Illinois University Carbondale, Carbondale, IL, USA
| | - Nicole L Kinlock
- Department of Ecology and Evolution, State University of New York at Stony Brook, Stony Brook, NY, USA
| | - Wilm Daniel Kissling
- Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, The Netherlands
| | - Kaoru Kitajima
- Graduate School of Agriculture, Kyoto University, Kyoto, Japan
- University of Florida, Gainesville, FL, USA
- School of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
| | - Thomas Kitzberger
- Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), CONICET, Bariloche, Argentina
- Departamento de Ecología, Universidad Nacional del Comahue, Bariloche, Argentina
| | - Rasmus Kjøller
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Tamir Klein
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Michael Kleyer
- Landscape Ecology Group, Institute of Biology and Environmental Sciences, University of Oldenburg, Oldenburg, Germany
| | - Jitka Klimešová
- Institute of Botany, Czech Academy of Sciences, Třeboň, Czech Republic
- Faculty of Sciences, Charles University, Praha, Czech Republic
| | - Joice Klipel
- Laboratório de Ecologia Vegetal (LEVEG), Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Brian Kloeppel
- Department of Geosciences and Natural Resources, Western Carolina University, Cullowhee, NC, USA
| | - Stefan Klotz
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Department of Community Ecology, Helmholtz Centre for Environmental Research-UFZ, Halle (Saale), Germany
| | - Johannes M H Knops
- Health and Environmental Sciences, Xi'an Jiaotong Liverpool University, Suzhou, Jiangsu, China
| | | | - Fumito Koike
- Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan
| | | | | | | | - Christian König
- Department of Geography, Humboldt University of Berlin, Berlin, Germany
- Biodiversity, Macroecology and Biogeography, University of Goettingen, Göttingen, Germany
| | - Nathan J B Kraft
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA
| | - Koen Kramer
- Wageningen University & Research, Wageningen, The Netherlands
- Land Life Company, Amsterdam, The Netherlands
| | - Holger Kreft
- Biodiversity, Macroecology and Biogeography, University of Goettingen, Göttingen, Germany
- Centre of Biodiversity and Sustainable Land Use (CBL), University of Goettingen, Göttingen, Germany
| | - Ingolf Kühn
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Helmholtz Centre for Environmental Research - UFZ, Halle, Germany
- Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Dushan Kumarathunge
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
- Plant Physiology Division, Coconut Research Institute of Sri Lanka, Lunuwila, Sri Lanka
| | - Jonas Kuppler
- Institute of Evolutionary Ecology and Conservation Genomics, Ulm University, Ulm, Germany
| | - Hiroko Kurokawa
- Forestry and Forest Products Research Institute, Tsukuba, Japan
| | | | - Shem Kuyah
- Jomo Kenyatta University of Agriculture and Technology (JKUAT), Nairobi, Kenya
| | - Jean-Paul Laclau
- CIRAD, UMR Eco&Sols, Montpellier, France
- Eco&Sols, CIRAD, INRA, IRD, SupAgro, University of Montpellier, Montpellier, France
| | - Benoit Lafleur
- Institut de recherche sur les forêts, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, QC, Canada
| | - Erik Lallai
- Department of Life and Environmental Sciences, Botany Division, University of Cagliari, Cagliari, Italy
| | - Eric Lamb
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Andrea Lamprecht
- GLORIA-Coordination, Institute for Interdisciplinary Mountain Research, Austrian Academy of Sciences & Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences Vienna, Vienna, Austria
| | - Daniel J Larkin
- Department of Fisheries, Wildlife and Conservation Biology, University of Minnesota, St. Paul, MN, USA
| | | | | | - Guerric le Maire
- CIRAD, UMR Eco&Sols, Montpellier, France
- Eco&Sols, CIRAD, INRA, IRD, SupAgro, University of Montpellier, Montpellier, France
| | - Peter C le Roux
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
| | | | - Tali Lee
- University of Wisconsin Eau Claire, Eau Claire, WI, USA
| | - Frederic Lens
- Naturalis Biodiversity Center, Leiden, The Netherlands
| | - Simon L Lewis
- School of Geography, University of Leeds, Leeds, UK
- Department of Geography, University College London, London, UK
| | | | - Yuanzhi Li
- Sun Yat-sen University, Guangzhou, China
| | - Xine Li
- Yangzhou University, Yangzhou, Jiangsu, China
| | | | | | - Jun Ying Lim
- Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, The Netherlands
| | - Yan-Shih Lin
- Macquarie University, North Ryde, NSW, Australia
| | | | - Chunjiang Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P. R. China
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, Shanghai, P.R. China
| | - Daijun Liu
- School of Geography, Earth and Environmental Sciences - University of Birmingham, Birmingham, UK
| | | | | | - Joan Llusià
- Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Madelon Lohbeck
- Forest Ecology and Forest Management Group, Wageningen University and Research, Wageningen, The Netherlands
- World Agroforestry (ICRAF), Nairobi, Kenya
| | - Álvaro López-García
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
- Dept. Animal Biology, Plant Biology and Ecology, University of Jaén, Jaén, Spain
| | | | - Zdeňka Lososová
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | - Frédérique Louault
- UCA, INRA, VetAgro Sup, UMR Ecosystème Prairial, Clermont-Ferrand, France
| | - Balázs A Lukács
- Department for Tisza River Research, MTA Centre for Ecological Research, DRI, Debrecen, Hungary
| | - Petr Lukeš
- Global Change Research Institute AS CR, Brno, Czech Republic
| | - Yunjian Luo
- Department of Ecology, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Michele Lussu
- Department of Life and Environmental Sciences, Botany Division, University of Cagliari, Cagliari, Italy
| | - Siyan Ma
- University of California at Berkeley, Berkeley, CA, USA
| | | | - Michelle Mack
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA
| | - Vincent Maire
- Université du Québec à Trois-Rivières, Trois-Rivières, Canada
| | - Annikki Mäkelä
- Institute of Atmospheric and Earth System Research (INAR), University of Helsinki, Helsinki, Finland
| | | | | | - Azim Mallik
- Lakehead University, Thunder Bay, ON, Canada
| | - Peter Manning
- Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
| | - Stefano Manzoni
- Department of Physical Geography, Stockholm University, Stockholm, Sweden
- Bolin Centre for Climate Research, Stockholm, Sweden
| | - Zuleica Marchetti
- Conicet-Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
- Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral (FICH-UNL), Santa Fe, Argentina
| | - Luca Marchino
- CREA - Research Centre for Forestry and Wood, Arezzo, Italy
| | | | - Eric Marcon
- Cirad, UMR EcoFoG (Agroparistech, CNRS, INRA, Université des Antilles, Université de la Guyane), Kourou, French Guiana, France
| | - Michela Marignani
- Department of Life and Environmental Sciences, Botany Division, University of Cagliari, Cagliari, Italy
| | | | - Adam Martin
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON, Canada
| | - Cristina Martínez-Garza
- Centro de Investigación en Biodiversidad y Conservación, Universidad Autónoma del Estado de Morelos, Morelos, Mexico
| | | | - Tereza Mašková
- Faculty of Sciences, Charles University, Praha, Czech Republic
| | - Kelly Mason
- Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
| | - Norman Mason
- Manaaki Whenua - Landcare Research, Hamilton, New Zealand
| | - Tara Joy Massad
- Department of Scientific Services, Gorongosa National Park, Beira, Sofala Province, Mozambique
| | - Jacynthe Masse
- Institut de recherche en biologie végétale, Montréal, QC, Canada
- Université de Montréal, Montréal, QC, Canada
| | - Itay Mayrose
- School of Plant Sciences and Food Security, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - James McCarthy
- School of Biological Sciences, The University of Queensland, Brisbane, Qld, Australia
- CSIRO, Canberra, ACT, Australia
- Manaaki Whenua - Landcare Research, Lincoln, New Zealand
| | | | | | - Ian R McFadden
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA
| | | | - Mara Y McPartland
- Department of Geography, Environment & Society, University of Minnesota, Minneapolis, MN, USA
| | | | - Belinda Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | | | - Zia Mehrabi
- Institute for Resources Environment and Sustainability, University of British Columbia, Vancouver, BC, Canada
| | - Patrick Meir
- Research School of Biology, The Australian National University, Canberra, ACT, Australia
- School of Geosciences, The University of Edinburgh, Edinburgh, UK
| | | | | | | | - Julie Messier
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Ilona Mészáros
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Juha Metsaranta
- Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, Edmonton, AB, Canada
| | - Sean T Michaletz
- Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, BC, Canada
| | - Chrysanthi Michelaki
- Biodiversity Conservation Laboratory, Department of Environment, University of the Aegean, Mytilene, Greece
| | - Svetlana Migalina
- Institute Botanic Garden, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
- Tyumen State University, Tyumen, Russia
| | | | | | - Vanessa Minden
- Institute of Biology and Environmental Sciences, University of Oldenburg, Oldenburg, Germany
- Department of Biology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Ray Ming
- University of Illinois at Urbana-Champaign, Urbana-Champaign, IL, USA
| | | | - Angela T Moles
- Evolution & Ecology Research Centre, and School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Attila Molnár
- Department of Botany, University of Debrecen, Hungary
| | | | - Martin Molz
- Fundação Zoobotânica do Rio Grande do Sul, Porto Allegre, Brazil
| | | | - Arnaud Monty
- Gembloux Agro-Bio Tech, Biodiversity and landscape, University of Liège, Belgium
| | - Lenka Moravcová
- Department of Invasion Ecology, Institute of Botany, Czech Academy of Sciences, Průhonice, Czech Republic
| | - Alvaro Moreno-Martínez
- Numerical Terradynamic Simulation Group (NTSG), College of Forestry and Conservation, University of Montana, Missoula, USA
| | - Marco Moretti
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
| | - Akira S Mori
- Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan
| | | | - Dave Morris
- Ontario Ministry of Natural Resources and Forestry, Centre for Northern Forest Ecosystem Research, Thunder Bay, ON, Canada
| | - Jane Morrison
- Universitat Politècnica de Catalunya, Castelldefels, Spain
| | - Ladislav Mucina
- Harry Butler Institute, Murdoch University, Perth, WA, Australia
- Dept of Geography & Environmental Studies, Stellenbosch University, Matieland, Stellenbosch, South Africa
| | - Sandra Mueller
- Geobotany, Faculty of Biology, University of Freiburg, Freiburg im Breisgau, Germany
| | | | - Sandra Cristina Müller
- Laboratório de Ecologia Vegetal, Departamento de Ecologia, Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - François Munoz
- Laboratoire d'Ecologie Alpine, Université Grenoble-Alpes, Grenoble Cedex 9, France
- French Institute of Pondicherry, Puducherry, India
| | | | - Randall W Myster
- Biology Department, Oklahoma State University, Oklahoma, OK, USA
| | | | - Shawna Naidu
- University of Illinois at Urbana-Champaign, Urbana-Champaign, IL, USA
| | - Ayyappan Narayanan
- Department of Ecology, French Institute of Pondicherry, Pondicherry, India
| | | | - Luka Negoita
- Galápagos Verde 2050, Charles Darwin Foundation, Charles Darwin Research Station, Galapagos, Ecuador
| | - Andrew S Nelson
- Forest, Rangeland, and Fire Sciences Department, University of Idaho, Moscow, ID, USA
| | - Eike Lena Neuschulz
- Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
| | - Jian Ni
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Georg Niedrist
- Eurac Research, Institute for Alpine Environment, Bozen-Bolzano, Italy
| | - Jhon Nieto
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogota, Colombia
- Universidad Distrital Francisco José de Caldas, Bogota, Colombia
| | - Ülo Niinemets
- Estonian University of Life Sciences, Tartu, Estonia
| | - Rachael Nolan
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | | | - Yann Nouvellon
- CIRAD, UMR Eco&Sols, Montpellier, France
- Eco&Sols, CIRAD, INRA, IRD, SupAgro, University of Montpellier, Montpellier, France
| | - Alexander Novakovskiy
- Institute of Biology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Komi Republic, Russia
| | - Kristin Odden Nystuen
- Faculty of Biosciences and Aquaculture, NORD University, Steinkjer, Norway
- Department of Biology, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | | | - Kevin O'Hara
- University of California at Berkeley, Berkeley, CA, USA
| | | | - Simon Oakley
- Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
| | | | | | - Ricardo Oliveira
- Departamento de Botânica, Universidade Federal do Paraná, Curitiba, Brazil
| | - Kinga Öllerer
- Institute of Biology Bucharest, Romanian Academy, Bucharest, Romania
- Institute of Ecology and Botany, MTA Centre for Ecological Research, Vácrátót, Hungary
| | - Mark E Olson
- Instituto de Biología, Tercer Circuito s/n de Ciudad Universitaria, Mexico City, Mexico
- Universidad Nacional Autónoma de México, Coyoacán, Mexico
| | - Vladimir Onipchenko
- Department of Ecology and Plant Geography, Faculty of Biology, Moscow Lomonosov State University, Moscow, Russia
| | | | - Renske E Onstein
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Jenny C Ordonez
- Facultad de Ingeniería Agroindustrial, Universidad de las Américas, Quito, Equador
| | | | - Ivika Ostonen
- Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
| | | | - Sarah Otto
- Department of Zoology, University of British Columbia, Vancouver, BC, Canada
| | | | - Wim A Ozinga
- Wageningen Environmental Research, Wageningen, The Netherlands
| | - Anna T Pahl
- Restoration Ecology, Technische Universität München, München, Germany
| | | | | | | | | | | | - Marco Patacca
- Wageningen University & Research, Wageningen, The Netherlands
| | - Susana Paula
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
| | - Juraj Paule
- Department of Botany and Molecular Evolution, Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany
| | - Harald Pauli
- GLORIA-Coordination, Institute for Interdisciplinary Mountain Research, Austrian Academy of Sciences & Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences Vienna, Vienna, Austria
| | - Juli G Pausas
- Desertification Research Center (CIDE-CSIC), Valencia, Spain
| | - Begoña Peco
- Departamento de Ecología, Centro de Investigación en Biodiversidad y Cambio Global (CIBC), Universidad Autónoma de Madrid, Madrid, Spain
| | - Josep Penuelas
- CREAF, Catalonia, Spain
- Global Ecology Unit CREAF-CSIC, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | - Pablo Luis Peri
- Instituto Nacional de Tecnología Agropecuaria (INTA), Río Gallegos, Santa Cruz, Argentina
- Universidad Nacional de la Patagonia Austral (UNPA), CONICET, Rio Gallegos, Argentina
| | | | - Alessandro Petraglia
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Any Mary Petritan
- National Institute for Research-Development in Forestry, Voluntari, Romania
| | | | - Simon Pierce
- Department of Agricultural and Environmental Sciences (DiSAA), University of Milan, Milano, Italy
| | - Valério D Pillar
- Department of Ecology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Jan Pisek
- Tartu Observatory, University of Tartu, Tartumaa, Estonia
| | | | - Hendrik Poorter
- Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia
- Plant Sciences (IBG2), Forschungszentrum Jülich GmbH, Jülich, Germany
| | | | - Peter Poschlod
- Ecology and Conservation Biology, Institute of Plant Sciences, University of Regensburg, Regensburg, Germany
| | | | | | - A Shafer Powell
- Environmental Sciences Division & Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Sally A Power
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | - Andreas Prinzing
- Research Unit ECOBIO - Ecosystèmes, Biodiversité, Evolution, Université Rennes 1/CNRS, Rennes, France
| | | | - Petr Pyšek
- Department of Invasion Ecology, Institute of Botany, Czech Academy of Sciences, Průhonice, Czech Republic
- Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Valerie Raevel
- AMAP, CIRAD, CNRS, IRD, INRA, Université de Montpellier, Montpellier, France
- French Institute of Pondicherry, Puducherry, India
- CEFE, CNRS, EPHE, Université de Montpellier, Université Paul Valéry, Montpellier, France
| | - Anja Rammig
- TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | | | - Courtenay A Ray
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Peter B Reich
- Department of Forest Resources, University of Minnesota, St. Paul, MN, USA
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | | | - Douglas E B Reid
- Ontario Ministry of Natural Resources and Forestry, Centre for Northern Forest Ecosystem Research, Thunder Bay, ON, Canada
| | | | - Victor Resco de Dios
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
- Department of Crop and Forest Sciences & Agrotecnio Center, Universitat de Lleida, Lleida, Spain
| | | | | | | | - Matthias C Rillig
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
- Freie Universität Berlin, Berlin, Germany
| | - Fiamma Riviera
- The University of Western Australia, Crawley, WA, Australia
| | - Elisabeth M R Robert
- Centre for Ecological Research and Forestry Applications (CREAF), Cerdanyola del Vallès, Spain
- Ecology and Biodiversity, Vrije Universiteit Brussel, Brussels, Belgium
- Laboratory of Wood Biology and Xylarium, Royal Museum for Central-Africa (RMCA), Tervuren, Belgium
| | - Scott Roberts
- Department of Forestry, Mississippi State University, Starkville, MS, USA
| | - Bjorn Robroek
- School of Biological Sciences, University of Southampton, Southampton, UK
- Aquatic Ecology and Environmental Biology, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Adam Roddy
- School of Forestry & Environmental Studies, Yale University, New Haven, CT, USA
| | - Arthur Vinicius Rodrigues
- Programa de pós-graduação em Ecologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - Alistair Rogers
- Environmental and Climate Sciences Department, Brookhaven National Laboratory, NY, Upton, USA
| | - Emily Rollinson
- Department of Biological Sciences, East Stroudsburg University, East Stroudsburg, PA, USA
| | - Victor Rolo
- Forest Research Group, INDEHESA, University of Extremadura, Plasencia, Spain
| | - Christine Römermann
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Ecology and Evolution, Friedrich Schiller University Jena, Jena, Germany
| | - Dina Ronzhina
- Institute Botanic Garden, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
- Tyumen State University, Tyumen, Russia
| | - Christiane Roscher
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Physiological Diversity, Helmholtz Centre for Environmental Research (UFZ), Leipzig, Germany
| | - Julieta A Rosell
- Laboratorio Nacional de Ciencias de la Sostenibilidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, Mexico
| | | | - Christian Rossi
- Remote Sensing Laboratories, Department of Geography, University of Zurich, Zurich, Switzerland
- Research Unit Community Ecology, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
- Department of Research and Geoinformation, Swiss National Park, Chastè Planta-Wildenberg, Zernez, Switzerland
| | - David B Roy
- Centre for Ecology & Hydrology (CEH), Wallingford, Oxfordshire, UK
| | | | - Nadja Rüger
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Smithsonian Tropical Research Institute, Balboa, Ancon, Republic of Panama
| | - Ricardo Ruiz-Peinado
- Departamento de Dinamica y Gestion Forestal, INIA-CIFOR, Madrid, Spain
- Sustainable Forest Management Research Institute, University of Valladolid-INIA, Madrid, Spain
| | - Sabine B Rumpf
- Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
- Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland
| | | | - Masahiro Ryo
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
- Freie Universität Berlin, Berlin, Germany
| | - Lawren Sack
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA
| | - Angela Saldaña
- Universidad Nacional Autónoma de México, Coyoacán, Mexico
| | | | | | - Ignacio Santa-Regina
- Instituto de Recursos Naturales y Agrobiología de Salamanca (IRNASA-CSIC), Salamanca, Spain
| | - Ana Carolina Santacruz-García
- Conicet-Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
- Facultad de Ciencias Forestales, Universidad Nacional de Santiago del Estero, Santiago del Estero, Argentina
| | - Joaquim Santos
- Centre for Functional Ecology, Departamento de Ciências da Vida, Universidade de Coimbra, Coimbra, Portugal
| | - Jordi Sardans
- Global Ecology Unit CREAF-CSIC, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | | | - Matthias Schleuning
- Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
| | - Bernhard Schmid
- Department of Geography, University of Zurich, Zürich, Switzerland
| | - Marco Schmidt
- Senckenberg Biodiversität und Klima Forschungszentrum (SBiK-F), Frankfurt, Germany
- Palmengarten der Stadt Frankfurt am Main, Frankfurt, Germany
| | | | - Julio V Schneider
- Department of Botany and Molecular Evolution, Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany
- Entomology III, Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany
| | - Simon D Schowanek
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
- Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Bioscience, Aarhus University, Aarhus, Denmark
| | - Julian Schrader
- Biodiversity, Macroecology and Biogeography, University of Goettingen, Göttingen, Germany
| | | | - Bernhard Schuldt
- Julius-von-Sachs-Institute for Biological Sciences, Chair of Ecophysiology and Vegetation Ecology, University of Wuerzburg, Wuerzburg, Germany
| | - Frank Schurr
- Institute of Landscape and Plant Ecology, University of Hohenheim, Stuttgart, Germany
| | | | - Marina Semchenko
- Department of Earth and Environmental Sciences, University of Manchester, Manchester, UK
| | - Colleen Seymour
- South African National Biodiversity Institute, Pretoria, South Africa
| | - Julia C Sfair
- Federal University of Pernambuco, Recife, PE, Brazil
| | | | - Christine S Sheppard
- Institute of Landscape and Plant Ecology, University of Hohenheim, Stuttgart, Germany
| | | | - Satomi Shiodera
- Research Institute for Humanity and Nature, Kyoto, Japan
- Center for Southeast Asian Studies, Kyoto University, Kyoto, Japan
| | - Bill Shipley
- Université de Sherbrooke, Sherbrooke, QC, Canada
| | | | | | - Carlos Sierra
- Max Planck Institute for Biogeochemistry, Jena, Germany
| | - Vasco Silva
- Centre for Applied Ecology "Professor Baeta Neves" (CEABN), School of Agriculture, University of Lisbon, Lisbon, Portugal
| | - Mateus Silva
- Department of Biology, Federal University of Lavras, Lavras, MG, Brazil
| | - Tommaso Sitzia
- Department Land, Environment, Agriculture and Forestry, Università degli Studi di Padova, Padua, Italy
| | - Henrik Sjöman
- Department of Landscape Architecture, Planning and Management, Swedish University of Agricultural Sciences, Alnarp, Sweden
- Gothenburg Botanical Garden, Gothenburg, Sweden
- Gothenburg Global Biodiversity Centre, Gothenburg, Sweden
| | - Martijn Slot
- Smithsonian Tropical Research Institute, Balboa, Ancon, Republic of Panama
| | | | - Darwin Sodhi
- Forest Sciences Centre, Faculty of Forestry and Conservation Science, University of British Columbia, Vancouver, BC, Canada
| | - Pamela Soltis
- Florida Museum of Natural History, University of Florida, Gainesville, FL, USA
| | - Douglas Soltis
- Florida Museum of Natural History, University of Florida, Gainesville, FL, USA
| | - Ben Somers
- Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium
| | | | | | | | | | - Alexandre F Souza
- Departamento de Ecologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Marko Spasojevic
- Department of Evolution, Ecology, and Organismal Biology, University of California Riverside, Riverside, CA, USA
| | | | - Amanda B Stan
- Department of Geography, Planning and Recreation, Northern Arizona University, Flagstaff, AZ, USA
| | - James Stegen
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Klaus Steinbauer
- GLORIA-Coordination, Institute for Interdisciplinary Mountain Research, Austrian Academy of Sciences & Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences Vienna, Vienna, Austria
| | - Jörg G Stephan
- Swedish Species Information Centre, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Frank Sterck
- Forest Ecology and Forest Management Group, Wageningen University, The Netherlands
| | - Dejan B Stojanovic
- Institute of Lowland Forestry and Environment, University of Novi Sad, Novi Sad, Serbia
| | | | - Maria Laura Suarez
- Instituto de Investigaciones en Biodiversidad y Medioambiente-CONICET, Universidad Nacional del Comahue, Bariloche, Argentina
| | - Jens-Christian Svenning
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
- Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Bioscience, Aarhus University, Aarhus, Denmark
| | - Ivana Svitková
- Institute of Botany, Plant Science and Biodiversity Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Marek Svitok
- Department of Ecology and General Biology, Faculty of Ecology and Environmental Sciences, Technical University in Zvolen, Zvolen, Slovakia
- Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Miroslav Svoboda
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Prague, Czech Republic
| | - Emily Swaine
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Nathan Swenson
- Department of Biology, University of Maryland, College Park, MD, USA
| | - Marcelo Tabarelli
- Departamento de Botânica, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Kentaro Takagi
- Teshio Experimental Forest, Hokkaido University, Horonobe, Japan
| | - Ulrike Tappeiner
- Department of Ecology, University of Innsbruck, Innsbruck, Austria
- Eurac Research, Institute for Alpine Environment, Bozen-Bolzano, Italy
| | - Rubén Tarifa
- Departamento de Ecología Funcional y Evolutiva, Estación Experimental de Zonas Áridas (CSIC), La Cañada de San Urbano, Spain
| | - Simon Tauugourdeau
- SELMET, CIRAD, INRA, Univ Montpellier, Montpellier SupAgro, France
- CIRAD-UMR SELMET-PZZS, Dakar, Senegal
| | | | - Mariska Te Beest
- Environmental Sciences, Copernicus Institute of Sustainable Development, Utrecht University, Utrecht, The Netherlands
- Centre for African Conservation Ecology, Nelson Mandela University, Port Elizabeth, South Africa
| | - Leho Tedersoo
- Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
| | - Nelson Thiffault
- Natural Resources Canada, Canadian Wood Fibre Centre, Quebec, QC, Canada
| | - Dominik Thom
- Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT, USA
| | | | - Ken Thompson
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | | | - Wilfried Thuiller
- Univ. Grenoble Alpes, CNRS, Univ. Savoie Mont Blanc, LECA, Grenoble, France
| | - Lubomír Tichý
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | - David Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | - Mark G Tjoelker
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | - David Yue Phin Tng
- Centre for Rainforest Studies, The School for Field Studies, Yungaburra, Qld, Australia
| | - Joseph Tobias
- Department of Life Sciences, Imperial College London, Silwood Park, Ascot, UK
| | - Péter Török
- MTA-DE Lendület Functional and Restoration Ecology Research Group, Debrecen, Hungary
- Department of Ecology, University of Debrecen, Debrecen, Hungary
| | - Tonantzin Tarin
- Department of Soil and Plant Sciences, University of Delaware, Newark, DE, USA
| | | | - Béla Tóthmérész
- MTA-TKI Biodiversity and Ecosystem Services Research Group, Debrecen, Hungary
| | - Martina Treurnicht
- SAEON Fynbos Node, Claremont, South Africa
- Department of Conservation Ecology and Entomology, Stellenbosch University, Matieland, South Africa
| | - Valeria Trivellone
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois, Champaign, IL, USA
| | - Franck Trolliet
- Unit for Modelling of Climate and Biogeochemical Cycles, UR-SPHERES, University of Liège, Liège, Belgique
| | - Volodymyr Trotsiuk
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Prague, Czech Republic
- Institute of Agricultural Sciences, Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland
| | - James L Tsakalos
- School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Ioannis Tsiripidis
- School of Biology, Department of Botany, Aristotle University of Thessaloniki, Greece
| | - Niklas Tysklind
- CIRAD, UMR EcoFoG (Agroparistech, CNRS, INRA, Université des Antilles, Université de la Guyane), Kourou, France
| | | | - Vladimir Usoltsev
- Ural State Forest Engineering University, Ekaterinburg, Russia
- Botanical Garden of Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia
| | | | - Jamil Vaezi
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Jana Vamosi
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Peter M van Bodegom
- Institute of Environmental Sciences, Leiden University, Leiden, The Netherlands
| | - Michiel van Breugel
- College Environmental Studies, Yale University, New Haven, CT, USA
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
- Smithsonian Tropical Research Institute, Panama City, Panama
| | - Elisa Van Cleemput
- Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium
| | | | | | - Fons van der Plas
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, Leipzig, Germany
| | - Masha T van der Sande
- Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, The Netherlands
- Forest Ecology and Forest Management Group, Wageningen University and Research, Wageningen, The Netherlands
- Institute for Global Ecology, Florida Institute of Technology, Melbourne, FL, USA
| | - Mark van Kleunen
- Department of Biology, University of Konstanz, Konstanz, Germany
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, China
| | | | - Mark Vanderwel
- Department of Biology, University of Regina, Regina, SK, Canada
| | - Kim André Vanselow
- Institute of Geography, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Angelica Vårhammar
- Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia
| | - Laura Varone
- Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
| | - Maribel Yesenia Vasquez Valderrama
- Universidad Distrital Francisco José de Caldas, Bogota, Colombia
- Laboratorio de invasiones Biológicas, Universidad de Concepcion, Concepcion, Chile
| | - Kiril Vassilev
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Mark Vellend
- Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Erik J Veneklaas
- School of Biological Sciences and School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
| | - Hans Verbeeck
- CAVElab - Computational and Applied Vegetation Ecology, Ghent University, Ghent, Belgium
| | - Kris Verheyen
- Department of Environment, Forest & Nature Lab, Ghent University, Gontrode-Melle, Belgium
| | | | - Ima Vieira
- Museu Paraense Emilio Goeldi, Belém, PA, Brazil
| | - Jaime Villacís
- Departamento de Ciencias de la Vida, Universidad de las Fuerzas Armadas (ESPE), Sangolquí, Ecuador
| | - Cyrille Violle
- UMR 5175 CEFE, Univ. Montpellier, CNRS, EPHE, IRD, Univ. Paul Valéry, Montpellier, France
| | - Pandi Vivek
- Department of Botany, Goa University, Goa, India
- Department of Ecology and Environmental Sciences, Pondicherry University, Puducherry, India
| | - Katrin Wagner
- Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Matthew Waldram
- School of Geography, Geology and Environment, University of Leicester, Leicester, UK
| | - Anthony Waldron
- Zoology Department, Edward Grey Institute, Oxford University, Oxford, UK
- Department of Zoology, Cambridge University, Cambridge Conservation Initiative, Cambridge, UK
| | - Anthony P Walker
- Environmental Sciences Division & Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Martyn Waller
- Department of Geography and Geology, Kingston University, Kingston upon Thames, UK
| | - Gabriel Walther
- Institute of Ecology and Evolution, Friedrich Schiller University Jena, Jena, Germany
| | - Han Wang
- Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China
| | - Feng Wang
- Institute of Desertification Studies, Chinese Academy of Forestry, Beijing, China
| | - Weiqi Wang
- Institute of Geography, Fujian Normal University, Fuzhou, China
| | - Harry Watkins
- Department of Landscape Architecture, University of Sheffield, Sheffield, UK
| | - James Watkins
- Department of Biology, Colgate University, Hamilton, NY, USA
| | - Ulrich Weber
- Max Planck Institute for Biogeochemistry, Jena, Germany
| | - James T Weedon
- Ecological Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Liping Wei
- Institut de recherche sur les forêts, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, QC, Canada
| | - Patrick Weigelt
- Biodiversity, Macroecology and Biogeography, University of Goettingen, Göttingen, Germany
| | - Evan Weiher
- University of Wisconsin Eau Claire, Eau Claire, WI, USA
| | - Aidan W Wells
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
- Maritime and Science Technology Academy, Miami, FL, USA
| | | | - Elizabeth Wenk
- Evolution & Ecology Research Centre, and School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Mark Westoby
- Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia
| | | | - Philip John White
- The James Hutton Institute, Dundee, UK
- King Saud University, Riyadh, Saudi Arabia
| | | | - Mathew Williams
- School of Geosciences, The University of Edinburgh, Edinburgh, UK
| | - Daniel E Winkler
- University of California - Irvine, Irvine, CA, USA
- Southwest Biological Science Center, U. S. Geological Survey, Moab, UT, USA
| | - Klaus Winter
- Smithsonian Tropical Research Institute, Balboa, Ancon, Republic of Panama
| | - Chevonne Womack
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
| | - Ian J Wright
- Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia
| | - S Joseph Wright
- Smithsonian Tropical Research Institute, Balboa, Ancon, Republic of Panama
| | - Justin Wright
- Department of Biology, Duke University, Durham, NC, USA
| | - Bruno X Pinho
- Departamento de Botânica, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Fabiano Ximenes
- NSW Department of Primary Industries, Parramatta, NSW, Australia
| | | | - Keiko Yamaji
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Ruth Yanai
- SUNY-College of Environmental Science and Forestry, Syracuse, NY, USA
| | - Nikolay Yankov
- Botanical Garden of the Samara University, Samara, Russia
| | - Benjamin Yguel
- Centre d'Ecologie et des Sciences de la Conservation (CESCO), Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique, Sorbonne-Université, Paris, France
| | | | - Amy E Zanne
- Biological Sciences, George Washington University, Washington, DC, USA
| | | | - Yun-Peng Zhao
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Jingming Zheng
- Forestry College, Beijing Forestry University, Beijing, China
| | - Ji Zheng
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P. R. China
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, Shanghai, P.R. China
| | | | - Chad R Zirbel
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN, USA
| | - Georg Zizka
- Department of Biological Sciences, Goethe Universität Frankfurt, Frankfurt am Main, Germany
- Department of Botany and Molecular Evolution, Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany
| | - Irié Casimir Zo-Bi
- Institut National Polytechnique Félix Houphouët-Boigny (INP-HB), Yamoussoukro, Côte d'Ivoire
| | - Gerhard Zotz
- Smithsonian Tropical Research Institute, Balboa, Ancon, Republic of Panama
- Institute for Biology and Environmental Sciences, University Oldenburg, Oldenburg, Germany
| | - Christian Wirth
- Max Planck Institute for Biogeochemistry, Jena, Germany
- German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- University of Leipzig, Leipzig, Germany
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Yang J, Duursma RA, De Kauwe MG, Kumarathunge D, Jiang M, Mahmud K, Gimeno TE, Crous KY, Ellsworth DS, Peters J, Choat B, Eamus D, Medlyn BE. Incorporating non-stomatal limitation improves the performance of leaf and canopy models at high vapour pressure deficit. Tree Physiol 2019; 39:1961-1974. [PMID: 31631220 DOI: 10.1093/treephys/tpz103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 08/02/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
Vapour pressure deficit (D) is projected to increase in the future as temperature rises. In response to increased D, stomatal conductance (gs) and photosynthesis (A) are reduced, which may result in significant reductions in terrestrial carbon, water and energy fluxes. It is thus important for gas exchange models to capture the observed responses of gs and A with increasing D. We tested a series of coupled A-gs models against leaf gas exchange measurements from the Cumberland Plain Woodland (Australia), where D regularly exceeds 2 kPa and can reach 8 kPa in summer. Two commonly used A-gs models were not able to capture the observed decrease in A and gs with increasing D at the leaf scale. To explain this decrease in A and gs, two alternative hypotheses were tested: hydraulic limitation (i.e., plants reduce gs and/or A due to insufficient water supply) and non-stomatal limitation (i.e., downregulation of photosynthetic capacity). We found that the model that incorporated a non-stomatal limitation captured the observations with high fidelity and required the fewest number of parameters. Whilst the model incorporating hydraulic limitation captured the observed A and gs, it did so via a physical mechanism that is incorrect. We then incorporated a non-stomatal limitation into the stand model, MAESPA, to examine its impact on canopy transpiration and gross primary production. Accounting for a non-stomatal limitation reduced the predicted transpiration by ~19%, improving the correspondence with sap flow measurements, and gross primary production by ~14%. Given the projected global increases in D associated with future warming, these findings suggest that models may need to incorporate non-stomatal limitation to accurately simulate A and gs in the future with high D. Further data on non-stomatal limitation at high D should be a priority, in order to determine the generality of our results and develop a widely applicable model.
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Affiliation(s)
- J Yang
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - R A Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - M G De Kauwe
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW 2052, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - D Kumarathunge
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - M Jiang
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - K Mahmud
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - T E Gimeno
- Basque Centre for Climate Change, Scientific Campus of the University of the Basque Country, Leioa 4894, Spain
- IKERBASQUE, Basque Foundation for Science, 48008 Bilbao, Spain
| | - K Y Crous
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - D S Ellsworth
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - J Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - B Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - D Eamus
- School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - B E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
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Mencuccini M, Rosas T, Rowland L, Choat B, Cornelissen H, Jansen S, Kramer K, Lapenis A, Manzoni S, Niinemets Ü, Reich P, Schrodt F, Soudzilovskaia N, Wright IJ, Martínez-Vilalta J. Leaf economics and plant hydraulics drive leaf : wood area ratios. New Phytol 2019; 224:1544-1556. [PMID: 31215647 DOI: 10.1111/nph.15998] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 06/08/2019] [Indexed: 06/09/2023]
Abstract
Biomass and area ratios between leaves, stems and roots regulate many physiological and ecological processes. The Huber value Hv (sapwood area/leaf area ratio) is central to plant water balance and drought responses. However, its coordination with key plant functional traits is poorly understood, and prevents developing trait-based prediction models. Based on theoretical arguments, we hypothesise that global patterns in Hv of terminal woody branches can be predicted from variables related to plant trait spectra, that is plant hydraulics and size and leaf economics. Using a global compilation of 1135 species-averaged Hv , we show that Hv varies over three orders of magnitude. Higher Hv are seen in short small-leaved low-specific leaf area (SLA) shrubs with low Ks in arid relative to tall large-leaved high-SLA trees with high Ks in moist environments. All traits depend on climate but climatic correlations are stronger for explanatory traits than Hv . Negative isometry is found between Hv and Ks , suggesting a compensation to maintain hydraulic supply to leaves across species. This work identifies the major global drivers of branch sapwood/leaf area ratios. Our approach based on widely available traits facilitates the development of accurate models of above-ground biomass allocation and helps predict vegetation responses to drought.
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Affiliation(s)
- Maurizio Mencuccini
- CREAF, Bellaterra, 08193, Barcelona, Spain
- ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
| | - Teresa Rosas
- CREAF, Bellaterra, 08193, Barcelona, Spain
- Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - Lucy Rowland
- Department of Geography, College of Life and Environmental Sciences, University of Exeter, EX4 4QE, Exeter, UK
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, 2751, NSW, Australia
| | - Hans Cornelissen
- Systems Ecology, Department of Ecological Science, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, the Netherlands
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Koen Kramer
- Wageningen University and Research, Droevendaalsesteeg 1, 6700 AA, Wageningen, the Netherlands
| | - Andrei Lapenis
- Department of Geography, New York State University at Albany, Albany, NY, 12222, USA
| | - Stefano Manzoni
- Physical Geography, Stockholm University, SE-10691, Stockholm, Sweden
- Bolin Centre for Climate Research, Stockholm University, SE-10691, Stockholm, Sweden
| | - Ülo Niinemets
- Estonian University of Life Science, Kreutzwladi 1, 51006, Tartu, Estonia
- Estonian Academy of Sciences, Kohtu 6, 10130, Tallinn, Estonia
| | - Peter Reich
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, 2751, NSW, Australia
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
| | - Franziska Schrodt
- School of Geography, University of Nottingham, NG7 2RD, Nottingham, UK
| | - Nadia Soudzilovskaia
- Institute of Environmental Sciences, CML, Leiden University, Einsteinweg 2, 2333 CC, Leiden, the Netherlands
| | - Ian J Wright
- Department of Biological Sciences, Macquarie University, Sydney, NSW, 2109, Australia
| | - Jordi Martínez-Vilalta
- CREAF, Bellaterra, 08193, Barcelona, Spain
- Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
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Blackman CJ, Li X, Choat B, Rymer PD, De Kauwe MG, Duursma RA, Tissue DT, Medlyn BE. Desiccation time during drought is highly predictable across species of Eucalyptus from contrasting climates. New Phytol 2019; 224:632-643. [PMID: 31264226 DOI: 10.1111/nph.16042] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 06/27/2019] [Indexed: 05/19/2023]
Abstract
Catastrophic failure of the water transport pathway in trees is a principal mechanism of mortality during extreme drought. To be able to predict the probability of mortality at an individual and landscape scale we need knowledge of the time for plants to reach critical levels of hydraulic failure. We grew plants of eight species of Eucalyptus originating from contrasting climates before allowing a subset to dehydrate. We tested whether a trait-based model of time to plant desiccation tcrit , from stomatal closure gs90 to a critical level of hydraulic dysfunction Ψcrit is consistent with observed dry-down times. Plant desiccation time varied among species, ranging from 96.2 to 332 h at a vapour-pressure deficit of 1 kPa, and was highly predictable using the tcrit model in conjunction with a leaf shedding function. Plant desiccation time was longest in species with high cavitation resistance, strong vulnerability segmentation, wide stomatal-hydraulic safety, and a high ratio of total plant water content to leaf area. Knowledge of tcrit in combination with water-use traits that influence stomatal closure could significantly increase our ability to predict the timing of drought-induced mortality at tree and forest scales.
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Affiliation(s)
- Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
- Université Clermont-Auvergne, INRA, PIAF, 63000, Clermont-Ferrand, France
| | - Ximeng Li
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Paul D Rymer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Martin G De Kauwe
- ARC Centre of Excellence for Extreme Climates, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Remko A Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
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Blackman CJ, Creek D, Maier C, Aspinwall MJ, Drake JE, Pfautsch S, O'Grady A, Delzon S, Medlyn BE, Tissue DT, Choat B. Drought response strategies and hydraulic traits contribute to mechanistic understanding of plant dry-down to hydraulic failure. Tree Physiol 2019; 39:910-924. [PMID: 30865274 DOI: 10.1093/treephys/tpz016] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 02/01/2019] [Indexed: 05/17/2023]
Abstract
Drought-induced tree mortality alters forest structure and function, yet our ability to predict when and how different species die during drought remains limited. Here, we explore how stomatal control and drought tolerance traits influence the duration of drought stress leading to critical levels of hydraulic failure. We examined the growth and physiological responses of four woody plant species (three angiosperms and one conifer) representing a range of water-use and drought tolerance traits over the course of two controlled drought-recovery cycles followed by an extended dry-down. At the end of the final dry-down phase, we measured changes in biomass ratios and leaf carbohydrates. During the first and second drought phases, plants of all species closed their stomata in response to decreasing water potential, but only the conifer species avoided water potentials associated with xylem embolism as a result of early stomatal closure relative to thresholds of hydraulic dysfunction. The time it took plants to reach critical levels of water stress during the final dry-down was similar among the angiosperms (ranging from 39 to 57 days to stemP88) and longer in the conifer (156 days to stemP50). Plant dry-down time was influenced by a number of factors including species stomatal-hydraulic safety margin (gsP90 - stemP50), as well as leaf succulence and minimum stomatal conductance. Leaf carbohydrate reserves (starch) were not depleted at the end of the final dry-down in any species, irrespective of the duration of drought. These findings highlight the need to consider multiple structural and functional traits when predicting the timing of hydraulic failure in plants.
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Affiliation(s)
- Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Danielle Creek
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Chelsea Maier
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Michael J Aspinwall
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
- Department of Biology, University of North Florida, 1 UNF Drive, Jacksonville, FL, USA
| | - John E Drake
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
- Forest and Natural Resources Management, SUNY-ESF, 1 Forestry Drive, Syracuse, NY, USA
| | - Sebastian Pfautsch
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
- School of Social Science and Psychology (Urban Studies), Western Sydney University, Locked Bag 1797, Penrith, NSW, Australia
| | | | | | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
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36
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Li X, Blackman CJ, Choat B, Rymer PD, Medlyn BE, Tissue DT. Drought tolerance traits do not vary across sites differing in water availability in Banksia serrata (Proteaceae). Funct Plant Biol 2019; 46:624-633. [PMID: 30961787 DOI: 10.1071/fp18238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 02/23/2019] [Indexed: 06/09/2023]
Abstract
Interspecific variation in plant hydraulic traits plays a major role in shaping species distributions across climates, yet variation within species is poorly understood. Here we report on intraspecific variation of hydraulic traits in Banksia serrata (L.f.) sampled from three sites characterised by contrasting climates (warm-wet, warm-dry and cool-wet). Hydraulic characteristics including vulnerability to embolism, hydraulic conductance, pressure-volume traits and key morphological traits were measured. Vulnerability to embolism in leaf and stem, defined by the water potential inducing 50 and 88% loss of hydraulic conductivity (P50 and P88 respectively), did not differ across sites. However, plants from the warm-dry environment exhibited higher stem conductivity (Ks) than the cool-wet environment. Leaf turgor loss point (TLP) did not vary among sites, but warm-dry site plants showed lower leaf capacitance (C*FT) and higher modulus of elasticity (ε) than the other two sites. Plants from the cool-wet site had lower specific leaf area (SLA) and plants from the warm-dry site had lower sapwood density (WD). Overall, key hydraulic traits were generally conserved across populations despite differences in mean site water availability, and the safety-efficiency trade-off was absent in this species. These results suggest that B. serrata has limited ability to adjust hydraulic architecture in response to environmental change and thus may be susceptible to climate change-type drought stress.
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Affiliation(s)
- Ximeng Li
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Paul D Rymer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; and Corresponding author.
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37
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Li X, Blackman CJ, Peters JMR, Choat B, Rymer PD, Medlyn BE, Tissue DT. More than iso/anisohydry: Hydroscapes integrate plant water use and drought tolerance traits in 10 eucalypt species from contrasting climates. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13320] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Ximeng Li
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
| | - Chris J. Blackman
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
| | - Jennifer M. R. Peters
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
| | - Paul D. Rymer
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
| | - Belinda E. Medlyn
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
| | - David T. Tissue
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
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38
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López R, Nolf M, Duursma RA, Badel E, Flavel RJ, Cochard H, Choat B. Mitigating the open vessel artefact in centrifuge-based measurement of embolism resistance. Tree Physiol 2019; 39:143-155. [PMID: 30085232 DOI: 10.1093/treephys/tpy083] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 07/03/2018] [Indexed: 06/08/2023]
Abstract
Centrifuge-based techniques to assess xylem vulnerability to embolism are increasingly being used, although we are yet to reach a consensus on the nature and extent of artefactual embolism observed in some angiosperm species. In particular, there is disagreement over whether these artefacts influence both the spin (Cavitron) and static versions of the centrifuge technique equally. We tested two methods for inducing embolism: bench dehydration and centrifugation. We used three methods to measure the resulting loss of conductivity: gravimetric flow measured in bench-dehydrated and centrifuged samples (static centrifuge), in situ flow measured under tension during spinning in the centrifuge (Cavitron) and direct imaging using X-ray computed microtomography (microCT) observations in stems of two species of Hakea that differ in vessel length. Both centrifuge techniques were prone to artefactual embolism in samples with maximum vessel length longer than, or similar to, the centrifuge rotor diameter. Observations with microCT indicated that this artefactual embolism occurred in the outermost portions of samples. The artefact was largely eliminated if flow was measured in an excised central part of the segment in the static centrifuge or starting measurements with the Cavitron at pressures lower than the threshold of embolism formation in open vessels. The simulations of loss of conductivity in centrifuged samples with a new model, CAVITOPEN, confirmed that the impact of open vessels on the vulnerability to embolism curve was higher when vessels were long, samples short and when embolism is formed in open vessels at less negative pressures. This model also offers a robust and quantitative tool to test and correct for artefactual embolism at low xylem tensions.
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Affiliation(s)
- Rosana López
- Université Clermont Auvergne, INRA, PIAF, 5, chemin de Beaulieu, Clermont-Ferrand, France
- Sistemas y Recursos Naturales, Universidad Politécnica de Madrid, C/ José Antonio Novais 10, Madrid, Spain
| | - Markus Nolf
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Locked Bag 1797, Penrith, NSW, Australia
| | - Remko A Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Locked Bag 1797, Penrith, NSW, Australia
| | - Eric Badel
- Université Clermont Auvergne, INRA, PIAF, 5, chemin de Beaulieu, Clermont-Ferrand, France
| | - Richard J Flavel
- School of Environmental and Rural Science, University of New England, Elm Avenue, 2351 Armidale, NSW, Australia
| | - Hervé Cochard
- Université Clermont Auvergne, INRA, PIAF, 5, chemin de Beaulieu, Clermont-Ferrand, France
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Locked Bag 1797, Penrith, NSW, Australia
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39
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Choat B, Nolf M, Lopez R, Peters JMR, Carins-Murphy MR, Creek D, Brodribb TJ. Non-invasive imaging shows no evidence of embolism repair after drought in tree species of two genera. Tree Physiol 2019; 39:113-121. [PMID: 30137594 DOI: 10.1093/treephys/tpy093] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/29/2018] [Indexed: 06/08/2023]
Abstract
Drought stress can result in significant impairment of the plant hydraulic system via blockage of xylem conduits by gas emboli. Recovery after drought stress is an essential component of plant survival but is still a poorly understood process. In this study, we examined the capacity of woody species from two genera (Eucalyptus and Quercus) to refill embolized xylem vessels during a cycle of drought and recovery. Observations were made on intact plants of Eucalyptus calmudulensis, E. grandis, E. saligna and Quercus palustris using X-ray microtomography. We found no evidence of an effective xylem refilling mechanism in any of the plant species. Despite rehydration and recovery of plant water potential to near pre-drought levels, embolized vessels were not refilled up to 72 h after rewatering. In E. saligna, water droplets accumulated in previously air-filled vessels for a very small percentage of vessels. However, no instances of complete refilling that would restore embolized vessels to hydraulic function were observed. Our observations suggest that rapid refilling of embolized vessels after drought may not be a wide spread mechanism in woody plants and that embolism formed during drought represents long term cost to the plant hydraulic system.
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Affiliation(s)
- Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Markus Nolf
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Rosana Lopez
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
- PIAF, Institut National dela Recherche Agronomique, UCA, Clermont-Ferrand, France
| | - Jennifer M R Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | | | - Danielle Creek
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia
| | - Timothy J Brodribb
- School of Biological Sciences, University of Tasmania, Hobart, TAS, Australia
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40
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Earles JM, Buckley TN, Brodersen CR, Busch FA, Cano FJ, Choat B, Evans JR, Farquhar GD, Harwood R, Huynh M, John GP, Miller ML, Rockwell FE, Sack L, Scoffoni C, Struik PC, Wu A, Yin X, Barbour MM. Embracing 3D Complexity in Leaf Carbon-Water Exchange. Trends Plant Sci 2019; 24:15-24. [PMID: 30309727 DOI: 10.1016/j.tplants.2018.09.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 09/06/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
Leaves are a nexus for the exchange of water, carbon, and energy between terrestrial plants and the atmosphere. Research in recent decades has highlighted the critical importance of the underlying biophysical and anatomical determinants of CO2 and H2O transport, but a quantitative understanding of how detailed 3D leaf anatomy mediates within-leaf transport has been hindered by the lack of a consensus framework for analyzing or simulating transport and its spatial and temporal dynamics realistically, and by the difficulty of measuring within-leaf transport at the appropriate scales. We discuss how recent technological advancements now make a spatially explicit 3D leaf analysis possible, through new imaging and modeling tools that will allow us to address long-standing questions related to plant carbon-water exchange.
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Affiliation(s)
- J Mason Earles
- School of Forestry & Environmental Studies, Yale University, New Haven, CT 06511, USA; Equal contribution
| | - Thomas N Buckley
- Department of Plant Sciences, University of California Davis, CA 95916, USA; Equal contribution
| | - Craig R Brodersen
- School of Forestry & Environmental Studies, Yale University, New Haven, CT 06511, USA
| | - Florian A Busch
- Research School of Biology, Australian National University, Action, ACT 0200, Australia
| | - F Javier Cano
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW 2753, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW 2753, Australia
| | - John R Evans
- Research School of Biology, Australian National University, Action, ACT 0200, Australia
| | - Graham D Farquhar
- Research School of Biology, Australian National University, Action, ACT 0200, Australia
| | | | - Minh Huynh
- University of Sydney, Sydney, NSW 2006, Australia
| | - Grace P John
- Department of Ecology and Evolutionary Biology, University of California Los Angeles, CA 90095, USA
| | - Megan L Miller
- College of Natural Resources, University of Idaho, Moscow, ID 83844, USA
| | - Fulton E Rockwell
- Department of Organism and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
| | - Lawren Sack
- Department of Ecology and Evolutionary Biology, University of California Los Angeles, CA 90095, USA
| | - Christine Scoffoni
- Department of Biological Sciences, California State University Los Angeles, CA 90032, USA
| | - Paul C Struik
- Department of Plant Sciences, Wageningen University, Centre for Crop Systems Analysis, 6700 AK Wageningen, The Netherlands
| | - Alex Wu
- Centre for Plant Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Xinyou Yin
- Department of Plant Sciences, Wageningen University, Centre for Crop Systems Analysis, 6700 AK Wageningen, The Netherlands
| | - Margaret M Barbour
- University of Sydney, Sydney, NSW 2006, Australia; www.sydney.edu.au/science/people/margaret.barbour.
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41
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Creek D, Blackman CJ, Brodribb TJ, Choat B, Tissue DT. Coordination between leaf, stem, and root hydraulics and gas exchange in three arid-zone angiosperms during severe drought and recovery. Plant Cell Environ 2018; 41:2869-2881. [PMID: 30106477 DOI: 10.1111/pce.13418] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 07/30/2018] [Indexed: 05/13/2023]
Abstract
The ability to resist hydraulic dysfunction in leaves, stems, and roots strongly influences whether plants survive and recover from drought. However, the coordination of hydraulic function among different organs within species and their links to gas exchange during drought and recovery remains understudied. Here, we examine the interaction between gas exchange and hydraulic function in the leaves, stems, and roots of three semiarid evergreen species exposed to a cycle of severe water stress (associated with substantial cavitation) and recovery. In all species, stomatal closure occurred at water potentials well before 50% loss of stem hydraulic conductance, while in two species, leaves and/or roots were more vulnerable than stems. Following soil rewetting, leaf-level photosynthesis (Anet ) returned to prestress levels within 2-4 weeks, whereas stomatal conductance and canopy transpiration were slower to recover. The recovery of Anet was decoupled from the recovery of leaf, stem, and root hydraulics, which remained impaired throughout the recovery period. Our results suggest that in addition to high embolism resistance, early stomatal closure and hydraulic vulnerability segmentation confers drought tolerance in these arid zone species. The lack of substantial embolism refilling within all major organs suggests that vulnerability of the vascular system to drought-induced dysfunction is a defining trait for predicting postdrought recovery.
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Affiliation(s)
- Danielle Creek
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, New South Wales, Australia
| | - Chris J Blackman
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, New South Wales, Australia
| | - Timothy J Brodribb
- School of Biological Science, University of Tasmania, Hobart, Tasmania, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, New South Wales, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, New South Wales, Australia
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42
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Klepsch M, Zhang Y, Kotowska MM, Lamarque LJ, Nolf M, Schuldt B, Torres-Ruiz JM, Qin DW, Choat B, Delzon S, Scoffoni C, Cao KF, Jansen S. Is xylem of angiosperm leaves less resistant to embolism than branches? Insights from microCT, hydraulics, and anatomy. J Exp Bot 2018; 69:5611-5623. [PMID: 30184113 PMCID: PMC6255699 DOI: 10.1093/jxb/ery321] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 08/28/2018] [Indexed: 05/23/2023]
Abstract
According to the hydraulic vulnerability segmentation hypothesis, leaves are more vulnerable to decline of hydraulic conductivity than branches, but whether stem xylem is more embolism resistant than leaves remains unclear. Drought-induced embolism resistance of leaf xylem was investigated based on X-ray microcomputed tomography (microCT) for Betula pendula, Laurus nobilis, and Liriodendron tulipifera, excluding outside-xylem, and compared with hydraulic vulnerability curves for branch xylem. Moreover, bordered pit characters related to embolism resistance were investigated for both organs. Theoretical P50 values (i.e. the xylem pressure corresponding to 50% loss of hydraulic conductance) of leaves were generally within the same range as hydraulic P50 values of branches. P50 values of leaves were similar to branches for L. tulipifera (-2.01 versus -2.10 MPa, respectively), more negative for B. pendula (-2.87 versus -1.80 MPa), and less negative for L. nobilis (-6.4 versus -9.2 MPa). Despite more narrow conduits in leaves than branches, mean interconduit pit membrane thickness was similar in both organs, but significantly higher in leaves of B. pendula than in branches. This case study indicates that xylem shows a largely similar embolism resistance across leaves and branches, although differences both within and across organs may occur, suggesting interspecific variation with regard to the hydraulic vulnerability segmentation hypothesis.
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Affiliation(s)
- Matthias Klepsch
- Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, Ulm University, Ulm, Germany
| | - Ya Zhang
- Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, Ulm University, Ulm, Germany
| | - Martyna M Kotowska
- Department of Biological Sciences Faculty of Science, Macquarie University, NSW, Australia
- Plant Ecology, Albrecht von Haller Institute for Plant Sciences, University of Göttingen, Untere Karspüle, Göttingen, Germany
| | - Laurent J Lamarque
- BIOGECO, INRA, University of Bordeaux, Pessac, France
- EGFV, INRA, University of Bordeaux, Villenave d’Ornon, France
| | - Markus Nolf
- Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, New South Wales, Australia
| | - Bernhard Schuldt
- Plant Ecology, Albrecht von Haller Institute for Plant Sciences, University of Göttingen, Untere Karspüle, Göttingen, Germany
| | - José M Torres-Ruiz
- BIOGECO, INRA, University of Bordeaux, Pessac, France
- Université Clermont-Auvergne, INRA, PIAF, Clermont-Ferrand, France
| | - De-Wen Qin
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Daxuedonglu, Nanning, Guangxi, PR China
| | - Brendan Choat
- Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, New South Wales, Australia
| | | | - Christine Scoffoni
- Department of Biological Sciences, California State University, Los Angeles, State University Drive, Los Angeles, CA, USA
| | - Kun-Fang Cao
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Daxuedonglu, Nanning, Guangxi, PR China
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, Ulm University, Ulm, Germany
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43
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Li X, Blackman CJ, Rymer PD, Quintans D, Duursma RA, Choat B, Medlyn BE, Tissue DT. Xylem embolism measured retrospectively is linked to canopy dieback in natural populations of Eucalyptus piperita following drought. Tree Physiol 2018; 38:1193-1199. [PMID: 29757423 DOI: 10.1093/treephys/tpy052] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
Manipulative experiments have suggested that embolism-induced hydraulic impairment underpins widespread tree mortality during extreme drought, yet in situ evidence is rare. One month after drought-induced leaf and branch dieback was observed in field populations of Eucalyptus piperita Sm. in the Blue Mountains (Australia), we measured the level of native stem embolism and characterized the extent of leaf death in co-occurring dieback and healthy (non-dieback) trees. We found that canopy dieback-affected trees showed significantly higher levels of native embolism (26%) in tertiary order branchlets than healthy trees (11%). Furthermore, there was a significant positive correlation (R2 = 0.51) between the level of leaf death and the level of native embolism recorded in branchlets from dieback-affected trees. This retrospective study suggests that hydraulic failure was the primary mechanism of leaf and branch dieback in response to a natural drought event in the field. It also suggests that post-drought embolism refilling is minimal or absent in this species of eucalypt.
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Affiliation(s)
- Ximeng Li
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Paul D Rymer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Desi Quintans
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Remko A Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW, Australia
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44
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Link RM, Schuldt B, Choat B, Jansen S, Cobb AR. Maximum-likelihood estimation of xylem vessel length distributions. J Theor Biol 2018; 455:329-341. [PMID: 30063923 DOI: 10.1016/j.jtbi.2018.07.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 07/26/2018] [Accepted: 07/27/2018] [Indexed: 10/28/2022]
Abstract
Vessel length is an important functional trait for plant hydraulics, because it determines the ratio of flow resistances posed by lumen and pit membranes and hence controls xylem hydraulic efficiency. The most commonly applied methods to estimate vessel lengths are based on the injection of silicon or paint into cut-off stem segments. The number of stained vessels in a series of cross-sections in increasing distance from the injection point is then counted. The resulting infusion profiles are used to estimate the vessel length distribution using one of several statistical algorithms. However, the basis of these algorithms has not been systematically analysed using probability theory. We derive a general mathematical expression for the expected shape of the infusion profile for a given vessel length distribution, provide analytic solutions for five candidate distributions (exponential, Erlang(2), gamma, Weibull, and log-normal), and present maximum likelihood estimators for the parameters of these distributions including implementations in R based on two potential sampling schemes (counting all injected vessels or counting the injected and empty vessels in a random subset of each cross-section). We then explore the performance of these estimators relative to other methods with Monte Carlo experiments. Our analysis demonstrates that most published methods estimate the conditional length distribution of vessels that cross an injection point, which is a size-biased version of the overall length distribution in the stem. We show the mathematical relationship between these distributions and provide methods to estimate either of them. According to our simulation experiments, vessel length distribution was best described by the more flexible models, especially the Weibull distribution. In simulations, the estimators were able to recover the parameters of the vessel length distribution if its functional form was known, achieving an overlap of 90% or more between the true and predicted length distribution when counting no more than 500 injected vessels in 10 cross-sections. This sample size nowadays can easily be reached with the help of automated image analysis.
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Affiliation(s)
- Roman M Link
- Plant Ecology, Albrecht von Haller Institute of Plant Sciences, University of Göttingen, Göttingen 37073, Germany; University of Würzburg, Julius-von-Sachs-Institute of Biological Sciences, Ecophysiology and Vegetation Ecology, Julius-von-Sachs-Platz 3, Würzburg 97082, Germany.
| | - Bernhard Schuldt
- Plant Ecology, Albrecht von Haller Institute of Plant Sciences, University of Göttingen, Göttingen 37073, Germany; University of Würzburg, Julius-von-Sachs-Institute of Biological Sciences, Ecophysiology and Vegetation Ecology, Julius-von-Sachs-Platz 3, Würzburg 97082, Germany.
| | - Brendan Choat
- Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, New South Wales, Australia.
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Ulm 89081, Germany.
| | - Alexander R Cobb
- Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
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45
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Choat B, Brodribb TJ, Brodersen CR, Duursma RA, López R, Medlyn BE. Triggers of tree mortality under drought. Nature 2018; 558:531-539. [DOI: 10.1038/s41586-018-0240-x] [Citation(s) in RCA: 647] [Impact Index Per Article: 107.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 05/02/2018] [Indexed: 01/08/2023]
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46
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Drake JE, Tjoelker MG, Vårhammar A, Medlyn BE, Reich PB, Leigh A, Pfautsch S, Blackman CJ, López R, Aspinwall MJ, Crous KY, Duursma RA, Kumarathunge D, De Kauwe MG, Jiang M, Nicotra AB, Tissue DT, Choat B, Atkin OK, Barton CVM. Trees tolerate an extreme heatwave via sustained transpirational cooling and increased leaf thermal tolerance. Glob Chang Biol 2018; 24:2390-2402. [PMID: 29316093 DOI: 10.1111/gcb.14037] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 11/21/2017] [Indexed: 05/24/2023]
Abstract
Heatwaves are likely to increase in frequency and intensity with climate change, which may impair tree function and forest C uptake. However, we have little information regarding the impact of extreme heatwaves on the physiological performance of large trees in the field. Here, we grew Eucalyptus parramattensis trees for 1 year with experimental warming (+3°C) in a field setting, until they were greater than 6 m tall. We withheld irrigation for 1 month to dry the surface soils and then implemented an extreme heatwave treatment of 4 consecutive days with air temperatures exceeding 43°C, while monitoring whole-canopy exchange of CO2 and H2 O, leaf temperatures, leaf thermal tolerance, and leaf and branch hydraulic status. The heatwave reduced midday canopy photosynthesis to near zero but transpiration persisted, maintaining canopy cooling. A standard photosynthetic model was unable to capture the observed decoupling between photosynthesis and transpiration at high temperatures, suggesting that climate models may underestimate a moderating feedback of vegetation on heatwave intensity. The heatwave also triggered a rapid increase in leaf thermal tolerance, such that leaf temperatures observed during the heatwave were maintained within the thermal limits of leaf function. All responses were equivalent for trees with a prior history of ambient and warmed (+3°C) temperatures, indicating that climate warming conferred no added tolerance of heatwaves expected in the future. This coordinated physiological response utilizing latent cooling and adjustment of thermal thresholds has implications for tree tolerance of future climate extremes as well as model predictions of future heatwave intensity at landscape and global scales.
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Affiliation(s)
- John E Drake
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
- Forest and Natural Resources Management, SUNY-ESF, Syracuse, NY, USA
| | - Mark G Tjoelker
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Angelica Vårhammar
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Peter B Reich
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
- Department of Forest Resources, University of Minnesota, St Paul, MN, USA
| | - Andrea Leigh
- School of Life Sciences, University of Technology Sydney, Broadway, NSW, Australia
| | - Sebastian Pfautsch
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Rosana López
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
- PIAF, INRA, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Michael J Aspinwall
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
- Department of Biology, University of North Florida, Jacksonville, FL, USA
| | - Kristine Y Crous
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Remko A Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Dushan Kumarathunge
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Martin G De Kauwe
- ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, Australia
| | - Mingkai Jiang
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Adrienne B Nicotra
- Division of Ecology & Evolution, Research School of Biology, The Australian National University, Canberra, ACT, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Owen K Atkin
- ARC Centre of Excellence in Plant Energy Biology, Research School of Biology, The Australian National University, Canberra, ACT, Australia
| | - Craig V M Barton
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
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47
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Taylor SH, Aspinwall MJ, Blackman CJ, Choat B, Tissue DT, Ghannoum O. CO2 availability influences hydraulic function of C3 and C4 grass leaves. J Exp Bot 2018; 69:2731-2741. [PMID: 29538702 PMCID: PMC5920307 DOI: 10.1093/jxb/ery095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 03/03/2018] [Indexed: 05/12/2023]
Abstract
Atmospheric CO2 (ca) has increased since the last glacial period, increasing photosynthetic water use efficiency and improving plant productivity. Evolution of C4 photosynthesis at low ca led to decreased stomatal conductance (gs), which provided an advantage over C3 plants that may be reduced by rising ca. Using controlled environments, we determined how increasing ca affects C4 water use relative to C3 plants. Leaf gas exchange and mass per area (LMA) were measured for four C3 and four C4 annual, crop-related grasses at glacial (200 µmol mol-1), ambient (400 µmol mol-1), and super-ambient (640 µmol mol-1) ca. C4 plants had lower gs, which resulted in a water use efficiency advantage at all ca and was broadly consistent with slower stomatal responses to shade, indicating less pressure on leaf water status. At glacial ca, net CO2 assimilation and LMA were lower for C3 than for C4 leaves, and C3 and C4 grasses decreased leaf hydraulic conductance (Kleaf) similarly, but only C4 leaves decreased osmotic potential at turgor loss. Greater carbon availability in C4 leaves at glacial ca generated a different hydraulic adjustment relative to C3 plants. At current and future ca, C4 grasses have advantages over C3 grasses due to lower gs, lower stomatal sensitivity, and higher absolute water use efficiency.
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Affiliation(s)
- Samuel H Taylor
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith NSW, Australia
- Lancaster Environment Centre, University of Lancaster, Lancaster, UK
| | - Michael J Aspinwall
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith NSW, Australia
- Department of Biology, University of North Florida, Drive, Jacksonville, FL, USA
| | - Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith NSW, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith NSW, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith NSW, Australia
| | - Oula Ghannoum
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith NSW, Australia
- ARC Centre of Excellence for Translational Photosynthesis, Australia
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48
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Anderegg WRL, Wolf A, Arango‐Velez A, Choat B, Chmura DJ, Jansen S, Kolb T, Li S, Meinzer FC, Pita P, Resco de Dios V, Sperry JS, Wolfe BT, Pacala S. Woody plants optimise stomatal behaviour relative to hydraulic risk. Ecol Lett 2018; 21:968-977. [DOI: 10.1111/ele.12962] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 02/25/2018] [Accepted: 03/13/2018] [Indexed: 01/06/2023]
Affiliation(s)
| | | | | | - Brendan Choat
- Hawkesbury Institute for the Environment Western Sydney University Penrith 2751 NSW Australia
| | - Daniel J. Chmura
- Institute of Dendrology Polish Academy of Sciences ul. Parkowa 5 62‐035 Kórnik Poland
| | - Steven Jansen
- Institute of Systematic Botany and Ecology Ulm University Albert‐Einstein‐Allee 11 89081 Ulm Germany
| | - Thomas Kolb
- School of Forestry Northern Arizona University Flagstaff AZ 86011 USA
| | - Shan Li
- Institute of Systematic Botany and Ecology Ulm University Albert‐Einstein‐Allee 11 89081 Ulm Germany
- Department of Wood Anatomy and Utilization Research Institute of Wood Industry Chinese Academy of Forestry Beijing 100091 China
| | | | - Pilar Pita
- Technical University of Madrid Madrid Spain
| | - Víctor Resco de Dios
- Department of Crop and Forest Sciences and Agrotecnio Center Universitat de Lleida Lleida 25198 Spain
| | - John S. Sperry
- Department of Biology University of Utah Salt Lake City UT84112 USA
| | | | - Stephen Pacala
- Department of Ecology and Evolutionary Biology Princeton University Princeton NJ 08544 USA
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49
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Li X, Blackman CJ, Choat B, Duursma RA, Rymer PD, Medlyn BE, Tissue DT. Tree hydraulic traits are coordinated and strongly linked to climate-of-origin across a rainfall gradient. Plant Cell Environ 2018; 41:646-660. [PMID: 29314083 DOI: 10.1111/pce.13129] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 05/18/2023]
Abstract
Plant hydraulic traits capture the impacts of drought stress on plant function, yet vegetation models lack sufficient information regarding trait coordination and variation with climate-of-origin across species. Here, we investigated key hydraulic and carbon economy traits of 12 woody species in Australia from a broad climatic gradient, with the aim of identifying the coordination among these traits and the role of climate in shaping cross-species trait variation. The influence of environmental variation was minimized by a common garden approach, allowing us to factor out the influence of environment on phenotypic variation across species. We found that hydraulic traits (leaf turgor loss point, stomatal sensitivity to drought [Pgs ], xylem vulnerability to cavitation [Px ], and branch capacitance [Cbranch ]) were highly coordinated across species and strongly related to rainfall and aridity in the species native distributional range. In addition, trade-offs between drought tolerance and plant growth rate were observed across species. Collectively, these results provide critical insight into the coordination among hydraulic traits in modulating drought adaptation and will significantly advance our ability to predict drought vulnerability in these dominant trees species.
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Affiliation(s)
- Ximeng Li
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
| | - Chris J Blackman
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
| | - Remko A Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
| | - Paul D Rymer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
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50
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Anderegg WRL, Wolf A, Arango-Velez A, Choat B, Chmura DJ, Jansen S, Kolb T, Li S, Meinzer F, Pita P, Resco de Dios V, Sperry JS, Wolfe BT, Pacala S. Plant water potential improves prediction of empirical stomatal models. PLoS One 2017; 12:e0185481. [PMID: 29023453 PMCID: PMC5638234 DOI: 10.1371/journal.pone.0185481] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 09/13/2017] [Indexed: 12/27/2022] Open
Abstract
Climate change is expected to lead to increases in drought frequency and severity, with deleterious effects on many ecosystems. Stomatal responses to changing environmental conditions form the backbone of all ecosystem models, but are based on empirical relationships and are not well-tested during drought conditions. Here, we use a dataset of 34 woody plant species spanning global forest biomes to examine the effect of leaf water potential on stomatal conductance and test the predictive accuracy of three major stomatal models and a recently proposed model. We find that current leaf-level empirical models have consistent biases of over-prediction of stomatal conductance during dry conditions, particularly at low soil water potentials. Furthermore, the recently proposed stomatal conductance model yields increases in predictive capability compared to current models, and with particular improvement during drought conditions. Our results reveal that including stomatal sensitivity to declining water potential and consequent impairment of plant water transport will improve predictions during drought conditions and show that many biomes contain a diversity of plant stomatal strategies that range from risky to conservative stomatal regulation during water stress. Such improvements in stomatal simulation are greatly needed to help unravel and predict the response of ecosystems to future climate extremes.
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Affiliation(s)
- William R. L. Anderegg
- Department of Biology, University of Utah, Salt Lake City, Utah, United States of America
| | - Adam Wolf
- Arable Labs, Princeton, New Jersey, United States of America
| | - Adriana Arango-Velez
- Connecticut Agricultural Experiment Station, New Haven, Connecticut, United States of America
| | - Brendan Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Daniel J. Chmura
- Institute of Dendrology, Polish Academy of Sciences, Kórnik, Poland
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, Germany
| | - Thomas Kolb
- School of Forestry, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Shan Li
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, Germany
| | - Frederick Meinzer
- Pacific Northwest Research Station, United States Forest Service, Portland, Oregon, United States of America
| | - Pilar Pita
- Technical University of Madrid, Madrid, Spain
| | - Víctor Resco de Dios
- Department of Crop and Forest Sciences and Agrotecnio Center, Universitat de Lleida, Lleida, Spain
| | - John S. Sperry
- Department of Biology, University of Utah, Salt Lake City, Utah, United States of America
| | | | - Stephen Pacala
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, United States of America
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