1
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Halim MA, Bieser JMH, Thomas SC. Large, sustained soil CO 2 efflux but rapid recovery of CH 4 oxidation in post-harvest and post-fire stands in a mixedwood boreal forest. Sci Total Environ 2024; 930:172666. [PMID: 38653415 DOI: 10.1016/j.scitotenv.2024.172666] [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: 07/30/2023] [Revised: 04/18/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
The net effect of forest disturbances, such as fires and harvesting, on soil greenhouse gas fluxes is determined by their impacts on both biological and physical factors, as well as the temporal dynamics of these effects post-disturbance. Although harvesting and fire may have distinct effects on soil carbon (C) dynamics, the temporal patterns in soil CO2 and CH4 fluxes and the potential differences between types of disturbances, remain poorly characterized in boreal forests. In this study, we measured soil CO2 and CH4 fluxes using a off-axis integrated cavity output spectroscopy system in snow-free seasons over two years in post-harvest and post-fire chronosequence sites within a mixedwood boreal forest in northwestern Ontario, Canada. Soil CO2 efflux showed a post-disturbance peak, with differing dynamics depending on the disturbance type: post-harvest stands exhibited a nearly tenfold increase (from ∼1 to ∼11 μmol CO2.m-2.s-1) from 1 to 9-10 years post-disturbance, followed by a steep decline; post-fire stands showed a more gradual increase, peaking at ∼6-7.2 μmol CO2.m-2.s-1 after ∼12-15 years. The youngest post-harvest stands were net sources of CH4,whereas post-fire stands were never net CH4 sources. In both disturbance types, the strength of the CH4 sink increased with stand age, approaching ∼2.4 nmol.m-2.s-1 by 15 years post-disturbance. Volumetric water content, bulk density, litter depth, and pH were significant predictors of CO2 fluxes; for CH4 fluxes, litter depth, pH, and the interaction of VWC and soil temperature were significant predictors in both disturbance types, with EC also showing a relationship in post-harvest stands. Our findings indicate that while soil CH4 oxidation rapidly recovers following disturbance, both post-harvest and post-fire stands show a multi-decade release of soil CO2 that is too large to be offset by C gains over this period.
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Affiliation(s)
- Md Abdul Halim
- Institute of Forestry and Conservation, University of Toronto, 33 Willcocks Street, M5S 3B3 Toronto, Canada; Department of Forestry and Environmental Science, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh.
| | - Jillian M H Bieser
- Institute of Forestry and Conservation, University of Toronto, 33 Willcocks Street, M5S 3B3 Toronto, Canada
| | - Sean C Thomas
- Institute of Forestry and Conservation, University of Toronto, 33 Willcocks Street, M5S 3B3 Toronto, Canada
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2
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Lindenmayer D, Zylstra P. Identifying and managing disturbance-stimulated flammability in woody ecosystems. Biol Rev Camb Philos Soc 2024; 99:699-714. [PMID: 38105616 DOI: 10.1111/brv.13041] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 12/07/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
Many forest types globally have been subject to an increase in the frequency of, and area burnt by, high-severity wildfire. Here we explore the role that previous disturbance has played in increasing the extent and severity of subsequent forest fires. We summarise evidence documenting and explaining the mechanisms underpinning a pulse of flammability that may follow disturbances such as fire, logging, clearing or windthrow (a process we term disturbance-stimulated flammability). Disturbance sometimes initiates a short initial period of low flammability, but then drives an extended period of increased flammability as vegetation regrows. Our analysis initially focuses on well-documented cases in Australia, but we also discuss where these pattens may apply elsewhere, including in the Northern Hemisphere. We outline the mechanisms by which disturbance drives flammability through disrupting the ecological controls that limit it in undisturbed forests. We then develop and test a conceptual model to aid prediction of woody vegetation communities where such patterns of disturbance-stimulated flammability may occur. We discuss the interaction of ecological controls with climate change, which is driving larger and more severe fires. We also explore the current state of knowledge around the point where disturbed, fire-prone stands are sufficiently widespread in landscapes that they may promote spatial contagion of high-severity wildfire that overwhelms any reduction in fire spread offered by less-flammable stands. We discuss how land managers might deal with the major challenges that changes in landscape cover and altered fire regimes may have created. This is especially pertinent in landscapes now dominated by extensive areas of young forest regenerating after logging, regrowing following broadscale fire including prescribed burning, or regenerating following agricultural land abandonment. Where disturbance is found to stimulate flammability, then key management actions should consider the long-term benefits of: (i) limiting disturbance-based management like logging or burning that creates young forests and triggers understorey development; (ii) protecting young forests from disturbances and assisting them to transition to an older, less-flammable state; and (iii) reinforcing the fire-inhibitory properties of older, less-flammable stands through methods for rapid fire detection and suppression.
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Affiliation(s)
- David Lindenmayer
- Fenner School of Environment and Society, Building 141, Linnaeus Way, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Phil Zylstra
- School of Molecular and Life Sciences, Curtin University, Kent Street, Bentley, Western Australia, 6102, Australia
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3
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Phelan JN, Van Houtven G, Clark CM, Buckley J, Cajka J, Hargrave A, Horn K, Thomas RQ, Sabo RD. Climate change could negate U.S. forest ecosystem service benefits gained through reductions in nitrogen and sulfur deposition. Sci Rep 2024; 14:10767. [PMID: 38730011 PMCID: PMC11087459 DOI: 10.1038/s41598-024-60652-z] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 04/25/2024] [Indexed: 05/12/2024] Open
Abstract
Climate change and atmospheric deposition of nitrogen (N) and sulfur (S) impact the health and productivity of forests. Here, we explored the potential impacts of these environmental stressors on ecosystem services provided by future forests in the contiguous U.S. We found that all stand-level services benefitted (+ 2.6 to 8.1%) from reductions in N+S deposition, largely attributable to positive responses to reduced S that offset the net negative effects of lower N levels. Sawtimber responded positively (+ 0.5 to 0.6%) to some climate change, but negatively (- 2.4 to - 3.8%) to the most extreme scenarios. Aboveground carbon (C) sequestration and forest diversity were negatively impacted by all modelled changes in climate. Notably, the most extreme climate scenario eliminated gains in all three services achieved through reduced deposition. As individual tree species responded differently to climate change and atmospheric deposition, associated services unique to each species increased or decreased under future scenarios. Our results suggest that climate change should be considered when evaluating the benefits of N and S air pollution policies on the services provided by U.S. forests.
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Affiliation(s)
| | | | - Christopher M Clark
- U.S. Environmental Protection Agency, Office of Research and Development, Washington, DC, USA
| | - John Buckley
- RTI International, 3040 E. Cornwallis Rd., RTP, NC, USA
| | - James Cajka
- RTI International, 3040 E. Cornwallis Rd., RTP, NC, USA
| | - Ashton Hargrave
- U.S. Department of Agriculture, Forest Service, National Forest System Washington Office, Fort Collins, CO, USA
| | - Kevin Horn
- Department of Forest Resources and Environmental Conservation, Virginia Polytechnic Institute, Blacksburg, VA, USA
| | - R Quinn Thomas
- Department of Forest Resources and Environmental Conservation, Virginia Polytechnic Institute, Blacksburg, VA, USA
- Department of Biological Sciences, Virginia Polytechnic Institute, Blacksburg, VA, USA
| | - Robert D Sabo
- U.S. Environmental Protection Agency, Office of Research and Development, Washington, DC, USA
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4
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Yan Y, Piao S, Hammond WM, Chen A, Hong S, Xu H, Munson SM, Myneni RB, Allen CD. Climate-induced tree-mortality pulses are obscured by broad-scale and long-term greening. Nat Ecol Evol 2024; 8:912-923. [PMID: 38467712 DOI: 10.1038/s41559-024-02372-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 02/16/2024] [Indexed: 03/13/2024]
Abstract
Vegetation greening has been suggested to be a dominant trend over recent decades, but severe pulses of tree mortality in forests after droughts and heatwaves have also been extensively reported. These observations raise the question of to what extent the observed severe pulses of tree mortality induced by climate could affect overall vegetation greenness across spatial grains and temporal extents. To address this issue, here we analyse three satellite-based datasets of detrended growing-season normalized difference vegetation index (NDVIGS) with spatial resolutions ranging from 30 m to 8 km for 1,303 field-documented sites experiencing severe drought- or heat-induced tree-mortality events around the globe. We find that severe tree-mortality events have distinctive but localized imprints on vegetation greenness over annual timescales, which are obscured by broad-scale and long-term greening. Specifically, although anomalies in NDVIGS (ΔNDVI) are negative during tree-mortality years, this reduction diminishes at coarser spatial resolutions (that is, 250 m and 8 km). Notably, tree-mortality-induced reductions in NDVIGS (|ΔNDVI|) at 30-m resolution are negatively related to native plant species richness and forest height, whereas topographic heterogeneity is the major factor affecting ΔNDVI differences across various spatial grain sizes. Over time periods of a decade or longer, greening consistently dominates all spatial resolutions. The findings underscore the fundamental importance of spatio-temporal scales for cohesively understanding the effects of climate change on forest productivity and tree mortality under both gradual and abrupt changes.
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Affiliation(s)
- Yuchao Yan
- Institute of Carbon Neutrality, Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Shilong Piao
- Institute of Carbon Neutrality, Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China.
- State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China.
| | - William M Hammond
- Institute of Food and Agricultural Sciences, Agronomy Department, University of Florida, Gainesville, FL, USA
| | - Anping Chen
- Department of Biology and Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO, USA.
| | - Songbai Hong
- Institute of Carbon Neutrality, Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Hao Xu
- Institute of Carbon Neutrality, Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Seth M Munson
- U.S. Geological Survey, Southwest Biological Science Center, Flagstaff, AZ, USA
| | - Ranga B Myneni
- Department of Earth and Environment, Boston University, Boston, MA, USA
| | - Craig D Allen
- Department of Geography and Environmental Studies, University of New Mexico, Albuquerque, NM, USA
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5
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Foest JJ, Bogdziewicz M, Pesendorfer MB, Ascoli D, Cutini A, Nussbaumer A, Verstraeten A, Beudert B, Chianucci F, Mezzavilla F, Gratzer G, Kunstler G, Meesenburg H, Wagner M, Mund M, Cools N, Vacek S, Schmidt W, Vacek Z, Hacket-Pain A. Widespread breakdown in masting in European beech due to rising summer temperatures. Glob Chang Biol 2024; 30:e17307. [PMID: 38709196 DOI: 10.1111/gcb.17307] [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: 01/29/2024] [Revised: 04/10/2024] [Accepted: 04/13/2024] [Indexed: 05/07/2024]
Abstract
Climate change effects on tree reproduction are poorly understood, even though the resilience of populations relies on sufficient regeneration to balance increasing rates of mortality. Forest-forming tree species often mast, i.e. reproduce through synchronised year-to-year variation in seed production, which improves pollination and reduces seed predation. Recent observations in European beech show, however, that current climate change can dampen interannual variation and synchrony of seed production and that this masting breakdown drastically reduces the viability of seed crops. Importantly, it is unclear under which conditions masting breakdown occurs and how widespread breakdown is in this pan-European species. Here, we analysed 50 long-term datasets of population-level seed production, sampled across the distribution of European beech, and identified increasing summer temperatures as the general driver of masting breakdown. Specifically, increases in site-specific mean maximum temperatures during June and July were observed across most of the species range, while the interannual variability of population-level seed production (CVp) decreased. The declines in CVp were greatest, where temperatures increased most rapidly. Additionally, the occurrence of crop failures and low seed years has decreased during the last four decades, signalling altered starvation effects of masting on seed predators. Notably, CVp did not vary among sites according to site mean summer temperature. Instead, masting breakdown occurs in response to warming local temperatures (i.e. increasing relative temperatures), such that the risk is not restricted to populations growing in warm average conditions. As lowered CVp can reduce viable seed production despite the overall increase in seed count, our results warn that a covert mechanism is underway that may hinder the regeneration potential of European beech under climate change, with great potential to alter forest functioning and community dynamics.
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Affiliation(s)
- Jessie J Foest
- Department of Geography and Planning, School of Environmental Sciences, University of Liverpool, Liverpool, UK
| | - Michał Bogdziewicz
- Faculty of Biology, Forest Biology Center, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Mario B Pesendorfer
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Davide Ascoli
- Department of Agriculture, Forest and Food Sciences, University of Turin, Turin, Italy
| | - Andrea Cutini
- CREA - Research Centre for Forestry and Wood, Arezzo, Italy
| | - Anita Nussbaumer
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
| | - Arne Verstraeten
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
| | - Burkhard Beudert
- Department of Conservation and Research, Bavarian Forest National Park, Grafenau, Germany
| | | | | | - Georg Gratzer
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Georges Kunstler
- Université Grenoble Alpes, INRAE, LESSEM, Saint-Martin-d'Hères, France
| | - Henning Meesenburg
- Department of Environmental Control, Northwest German Forest Research Institute, Göttingen, Germany
| | - Markus Wagner
- Department of Environmental Control, Northwest German Forest Research Institute, Göttingen, Germany
| | - Martina Mund
- Forestry Research and Competence Centre Gotha, Gotha, Germany
| | - Nathalie Cools
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
| | - Stanislav Vacek
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Wolfgang Schmidt
- Department of Silviculture and Forest Ecology of the Temperate Zones, University of Göttingen, Göttingen, Germany
| | - Zdeněk Vacek
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Andrew Hacket-Pain
- Department of Geography and Planning, School of Environmental Sciences, University of Liverpool, Liverpool, UK
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6
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Wessely J, Essl F, Fiedler K, Gattringer A, Hülber B, Ignateva O, Moser D, Rammer W, Dullinger S, Seidl R. A climate-induced tree species bottleneck for forest management in Europe. Nat Ecol Evol 2024:10.1038/s41559-024-02406-8. [PMID: 38684739 DOI: 10.1038/s41559-024-02406-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 03/24/2024] [Indexed: 05/02/2024]
Abstract
Large pulses of tree mortality have ushered in a major reorganization of Europe's forest ecosystems. To initiate a robust next generation of trees, the species that are planted today need to be climatically suitable throughout the entire twenty-first century. Here we developed species distribution models for 69 European tree species based on occurrence data from 238,080 plot locations to investigate the option space for current forest management in Europe. We show that the average pool of tree species continuously suitable throughout the century is smaller than that under current and end-of-century climate conditions, creating a tree species bottleneck for current management. If the need for continuous climate suitability throughout the lifespan of a tree planted today is considered, climate change shrinks the tree species pool available to management by between 33% and 49% of its current values (40% and 54% of potential end-of-century values), under moderate (Representative Concentration Pathway 2.6) and severe (Representative Concentration Pathway 8.5) climate change, respectively. This bottleneck could have strong negative impacts on timber production, carbon storage and biodiversity conservation, as only 3.18, 3.53 and 2.56 species of high potential for providing these functions remain suitable throughout the century on average per square kilometre in Europe. Our results indicate that the option space for silviculture is narrowing substantially because of climate change and that an important adaptation strategy in forestry-creating mixed forests-might be curtailed by widespread losses of climatically suitable tree species.
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Affiliation(s)
- Johannes Wessely
- Division of Biodiversity Dynamics and Conservation, Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria.
| | - Franz Essl
- Division of BioInvasions, Global Change and Macroecology, Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
- Centre for Invasion Biology, Stellenbosch University, Stellenbosch, South Africa
| | - Konrad Fiedler
- Division of Tropical Ecology and Animal Biodiversity, Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | - Andreas Gattringer
- Division of Biodiversity Dynamics and Conservation, Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | - Bernhard Hülber
- Division of Biodiversity Dynamics and Conservation, Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | - Olesia Ignateva
- Research Division Cartography, Department of Geodesy and Geoinformation, Vienna University of Technology, Vienna, Austria
| | - Dietmar Moser
- Division of Biodiversity Dynamics and Conservation, Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | - Werner Rammer
- Ecosystem Dynamics and Forest Management Group, School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Stefan Dullinger
- Division of Biodiversity Dynamics and Conservation, Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | - Rupert Seidl
- Ecosystem Dynamics and Forest Management Group, School of Life Sciences, Technical University of Munich, Freising, Germany
- Berchtesgaden National Park, Berchtesgaden, Germany
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7
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Feng X, Peterson AT, Aguirre-López LJ, Burger JR, Chen X, Papeş M. Rethinking ecological niches and geographic distributions in face of pervasive human influence in the Anthropocene. Biol Rev Camb Philos Soc 2024. [PMID: 38597328 DOI: 10.1111/brv.13077] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/08/2024] [Accepted: 03/18/2024] [Indexed: 04/11/2024]
Abstract
Species are distributed in predictable ways in geographic spaces. The three principal factors that determine geographic distributions of species are biotic interactions (B), abiotic conditions (A), and dispersal ability or mobility (M). A species is expected to be present in areas that are accessible to it and that contain suitable sets of abiotic and biotic conditions for it to persist. A species' probability of presence can be quantified as a combination of responses to B, A, and M via ecological niche modeling (ENM; also frequently referred to as species distribution modeling or SDM). This analytical approach has been used broadly in ecology and biogeography, as well as in conservation planning and decision-making, but commonly in the context of 'natural' settings. However, it is increasingly recognized that human impacts, including changes in climate, land cover, and ecosystem function, greatly influence species' geographic ranges. In this light, historical distinctions between natural and anthropogenic factors have become blurred, and a coupled human-natural landscape is recognized as the new norm. Therefore, B, A, and M (BAM) factors need to be reconsidered to understand and quantify species' distributions in a world with a pervasive signature of human impacts. Here, we present a framework, termed human-influenced BAM (Hi-BAM, for distributional ecology that (i) conceptualizes human impacts in the form of six drivers, and (ii) synthesizes previous studies to show how each driver modifies the natural BAM and species' distributions. Given the importance and prevalence of human impacts on species distributions globally, we also discuss implications of this framework for ENM/SDM methods, and explore strategies by which to incorporate increasing human impacts in the methodology. Human impacts are redefining biogeographic patterns; as such, future studies should incorporate signals of human impacts integrally in modeling and forecasting species' distributions.
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Affiliation(s)
- Xiao Feng
- Department of Biology, University of North Carolina, Chapel Hill, NC, 27599, USA
| | | | | | - Joseph R Burger
- Department of Biology, University of Kentucky, Lexington, KY, 40502, USA
| | - Xin Chen
- Appalachian Laboratory, University of Maryland Center for Environmental Science, Frostburg, MD, 21532, USA
| | - Monica Papeş
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, 37996, USA
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8
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Cantarello E, Jacobsen JB, Lloret F, Lindner M. Shaping and enhancing resilient forests for a resilient society. Ambio 2024:10.1007/s13280-024-02006-7. [PMID: 38580897 DOI: 10.1007/s13280-024-02006-7] [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] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/24/2024] [Accepted: 02/29/2024] [Indexed: 04/07/2024]
Abstract
The world is currently facing uncertainty caused by environmental, social, and economic changes and by political shocks. Fostering social-ecological resilience by enhancing forests' ability to provide a range of ecosystem services, including carbon sequestration, habitat provision, and sustainable livelihoods, is key to addressing such uncertainty. However, policy makers and managers currently lack a clear understanding of how to operationalise the shaping of resilience through the combined challenges of climate change, the biodiversity crisis, and changes in societal demand. Based on a scientific literature review, we identified a set of actions related to ecosystem services, biodiversity conservation, and disturbance and pressure impacts that forest managers and policy makers should attend to enhance the resilience of European forest systems. We conclude that the resilience shaping of forests should (1) adopt an operational approach, which is currently lacking, (2) identify and address existing and future trade-offs while reinforcing win-wins and (3) attend to local particularities through an adaptive management approach.
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Affiliation(s)
- Elena Cantarello
- Department of Life and Environmental Sciences, Bournemouth University, Talbot Campus, Poole, BH12 5BB, UK.
| | - Jette Bredahl Jacobsen
- Department of Food and Resource Economics, University of Copenhagen, Rolighedsvej 23, 1958, Frederiksberg C, Denmark
| | - Francisco Lloret
- Center for Ecological Research and Forestry Applications (CREAF), Universitat Autònoma Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Marcus Lindner
- European Forest Institute, Platz der Vereinten Nationen 7, 53113, Bonn, Germany
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9
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Abs E, Chase AB, Manzoni S, Ciais P, Allison SD. Microbial evolution-An under-appreciated driver of soil carbon cycling. Glob Chang Biol 2024; 30:e17268. [PMID: 38562029 DOI: 10.1111/gcb.17268] [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: 12/20/2023] [Revised: 03/18/2024] [Accepted: 03/18/2024] [Indexed: 04/04/2024]
Abstract
Although substantial advances in predicting the ecological impacts of global change have been made, predictions of the evolutionary impacts have lagged behind. In soil ecosystems, microbes act as the primary energetic drivers of carbon cycling; however, microbes are also capable of evolving on timescales comparable to rates of global change. Given the importance of soil ecosystems in global carbon cycling, we assess the potential impact of microbial evolution on carbon-climate feedbacks in this system. We begin by reviewing the current state of knowledge concerning microbial evolution in response to global change and its specific effect on soil carbon dynamics. Through this integration, we synthesize a roadmap detailing how to integrate microbial evolution into ecosystem biogeochemical models. Specifically, we highlight the importance of microscale mechanistic soil carbon models, including choosing an appropriate evolutionary model (e.g., adaptive dynamics, quantitative genetics), validating model predictions with 'omics' and experimental data, scaling microbial adaptations to ecosystem level processes, and validating with ecosystem-scale measurements. The proposed steps will require significant investment of scientific resources and might require 10-20 years to be fully implemented. However, through the application of multi-scale integrated approaches, we will advance the integration of microbial evolution into predictive understanding of ecosystems, providing clarity on its role and impact within the broader context of environmental change.
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Affiliation(s)
- Elsa Abs
- Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, California, USA
- Laboratoire Des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Alexander B Chase
- Department of Earth Sciences, Southern Methodist University, Dallas, Texas, USA
| | - Stefano Manzoni
- Department of Physical Geography and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
| | - Philippe Ciais
- Laboratoire Des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Steven D Allison
- Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, California, USA
- Department of Earth System Science, University of California, Irvine, Irvine, California, USA
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10
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Barker Plotkin A, Orwig DA, MacLean MG, Ellison AM. Logging response alters trajectories of reorganization after loss of a foundation tree species. Ecol Appl 2024; 34:e2957. [PMID: 38485492 DOI: 10.1002/eap.2957] [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: 06/28/2023] [Revised: 10/22/2023] [Accepted: 12/20/2023] [Indexed: 04/04/2024]
Abstract
Forest insect outbreaks cause large changes in ecosystem structure, composition, and function. Humans often respond to insect outbreaks by conducting salvage logging, which can amplify the immediate effects, but it is unclear whether logging will result in lasting differences in forest structure and dynamics when compared with forests affected only by insect outbreaks. We used 15 years of data from an experimental removal of Tsuga canadensis (L.) Carr. (Eastern hemlock), a foundation tree species within eastern North American forests, and contrasted the rate, magnitude, and persistence of response trajectories between girdling (emulating mortality from insect outbreak) and timber harvest treatments. Girdling and logging were equally likely to lead to large changes in forest structure and dynamics, but logging resulted in faster rates of change. Understory light increases and community composition changes were larger and more rapid in the logged plots. Tree seedling and understory vegetation abundance increased more in the girdled plots; this likely occurred because seedlings grew rapidly into the sapling- and tree-size classes after logging and quickly shaded out plants on the forest floor. Downed deadwood pools increased more after logging but standing deadwood pools increased dramatically after girdling. Understory light levels remained elevated for a longer time after girdling. Perhaps because the window of opportunity for understory species to establish was longer in the girdled plots, total species richness increased more in the girdled than logged plots. Despite the potential for greater diversity in the girdled plots, Betula lenta L. (black birch) was the most abundant tree species recruited into the sapling- and tree-size classes in both the girdled and logged plots and is poised to dominate the new forest canopy. The largest difference between the girdling and logging treatments-deadwood structure and quantity-will persist and continue to bolster aboveground carbon storage and structural and habitat diversity in the girdled plots. Human responses to insect outbreaks hasten forest reorganization and remove structural resources that may further alter forest response to ongoing climate stress and future disturbances.
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Affiliation(s)
- Audrey Barker Plotkin
- Harvard Forest, Harvard University, Petersham, Massachusetts, USA
- Department of Environmental Conservation, University of Massachusetts, Amherst, Massachusetts, USA
| | - David A Orwig
- Harvard Forest, Harvard University, Petersham, Massachusetts, USA
| | - Meghan Graham MacLean
- Department of Environmental Conservation, University of Massachusetts, Amherst, Massachusetts, USA
| | - Aaron M Ellison
- Harvard Forest, Harvard University, Petersham, Massachusetts, USA
- Sound Solutions for Sustainable Science, Boston, Massachusetts, USA
- Harvard University Herbaria, Harvard University, Cambridge, Massachusetts, USA
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11
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Billing M, Sakschewski B, von Bloh W, Vogel J, Thonicke K. 'How to adapt forests?'-Exploring the role of leaf trait diversity for long-term forest biomass under new climate normals. Glob Chang Biol 2024; 30:e17258. [PMID: 38629937 DOI: 10.1111/gcb.17258] [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: 11/06/2023] [Revised: 02/23/2024] [Accepted: 02/23/2024] [Indexed: 04/19/2024]
Abstract
Forests, critical components of global ecosystems, face unprecedented challenges due to climate change. This study investigates the influence of functional diversity-as a component of biodiversity-to enhance long-term biomass of European forests in the context of changing climatic conditions. Using the next-generation flexible trait-based vegetation model, LPJmL-FIT, we explored the impact of functional diversity on long-term forest biomass under three different climate change scenarios (video abstract: https://www.pik-potsdam.de/~billing/video/2023/video_abstract_billing_et_al_LPJmLFIT.mp4). Four model set-ups were tested with varying degrees of functional diversity and best-suited functional traits. Our results show that functional diversity positively influences long-term forest biomass, particularly when climate warming is low (RCP2.6). Under these conditions, high-diversity simulations led to an approximately 18.2% increase in biomass compared to low-diversity experiments. However, as climate change intensity increased, the benefits of functional diversity diminished (RCP8.5). A Bayesian multilevel analysis revealed that both full leaf trait diversity and diversity of plant functional types contributed significantly to biomass enhancement under low warming scenarios in our model simulations. Under strong climate change, the presence of a mixture of different functional groups (e.g. summergreen and evergreen broad-leaved trees) was found more beneficial than the diversity of leaf traits within a functional group (e.g. broad-leaved summergreen trees). Ultimately, this research challenges the notion that planting only the most productive and climate-suited trees guarantees the highest future biomass and carbon sequestration. We underscore the importance of high functional diversity and the potential benefits of fostering a mixture of tree functional types to enhance long-term forest biomass in the face of climate change.
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Affiliation(s)
- Maik Billing
- Research Domain 1 'Earth System Analysis', Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, Potsdam, Germany
| | - Boris Sakschewski
- Research Domain 1 'Earth System Analysis', Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, Potsdam, Germany
| | - Werner von Bloh
- Research Domain 1 'Earth System Analysis', Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, Potsdam, Germany
| | - Johannes Vogel
- Research Domain 1 'Earth System Analysis', Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, Potsdam, Germany
- Theoretical Ecology, Institute of Biology, Freie Universität Berlin, Berlin, Germany
- Department of Computational Hydrosystems, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
- ScaDS.AI-Center for Scalable Data Analytics and Artificial Intelligence, Leipzig University, Leipzig, Germany
| | - Kirsten Thonicke
- Research Domain 1 'Earth System Analysis', Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, Potsdam, Germany
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12
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Puchi PF, Dalmonech D, Vangi E, Battipaglia G, Tognetti R, Collalti A. Contrasting patterns of water use efficiency and annual radial growth among European beech forests along the Italian peninsula. Sci Rep 2024; 14:6526. [PMID: 38499662 DOI: 10.1038/s41598-024-57293-7] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 03/16/2024] [Indexed: 03/20/2024] Open
Abstract
Tree mortality and forest dieback episodes are increasing due to drought and heat stress. Nevertheless, a comprehensive understanding of mechanisms enabling trees to withstand and survive droughts remains lacking. Our study investigated basal area increment (BAI), and δ13C-derived intrinsic water-use-efficiency (iWUE), to elucidate beech resilience across four healthy stands in Italy with varying climates and soil water availability. Additionally, fist-order autocorrelation (AR1) analysis was performed to detect early warning signals for potential tree dieback risks during extreme drought events. Results reveal a negative link between BAI and vapour pressure deficit (VPD), especially in southern latitudes. After the 2003 drought, BAI decreased at the northern site, with an increase in δ13C and iWUE, indicating conservative water-use. Conversely, the southern sites showed increased BAI and iWUE, likely influenced by rising CO2 and improved water availability. In contrast, the central site sustained higher transpiration rates due to higher soil water holding capacity (SWHC). Despite varied responses, most sites exhibited reduced resilience to future extreme events, indicated by increased AR1. Temperature significantly affected beech iWUE and BAI in northern Italy, while VPD strongly influenced the southern latitudes. The observed increase in BAI and iWUE in southern regions might be attributed to an acclimation response.
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Affiliation(s)
- Paulina F Puchi
- Forest Modelling Lab., Institute for Agriculture and Forestry Systems in the Mediterranean, National Research Council of Italy (CNR-ISAFOM), Via Madonna Alta 128, 06128, Perugia, Italy.
- Institute of Bioeconomy, Italian National Research Council (CNR-IBE), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy.
| | - Daniela Dalmonech
- Forest Modelling Lab., Institute for Agriculture and Forestry Systems in the Mediterranean, National Research Council of Italy (CNR-ISAFOM), Via Madonna Alta 128, 06128, Perugia, Italy
- National Biodiversity Future Center (NBFC), 90133, Palermo, Italy
| | - Elia Vangi
- Forest Modelling Lab., Institute for Agriculture and Forestry Systems in the Mediterranean, National Research Council of Italy (CNR-ISAFOM), Via Madonna Alta 128, 06128, Perugia, Italy
| | - Giovanna Battipaglia
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania 'L. Vanvitelli', Caserta, Italy
| | - Roberto Tognetti
- Faculty of Agricultural, Environmental and Food Sciences, Free University of Bozen-Bolzano, Piazza Università 1, 39100, Bolzano, Italy
| | - Alessio Collalti
- Forest Modelling Lab., Institute for Agriculture and Forestry Systems in the Mediterranean, National Research Council of Italy (CNR-ISAFOM), Via Madonna Alta 128, 06128, Perugia, Italy
- National Biodiversity Future Center (NBFC), 90133, Palermo, Italy
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13
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Dong W, Mitchard ETA, Santoro M, Chen M, Wheeler CE. A new circa 2007 biomass map for China differs significantly from existing maps. Sci Data 2024; 11:287. [PMID: 38467652 PMCID: PMC10928215 DOI: 10.1038/s41597-024-03092-8] [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: 07/18/2023] [Accepted: 02/27/2024] [Indexed: 03/13/2024] Open
Abstract
The forest area of China is the fifth largest of any country, and unlike in many other countries, in recent decades its area has been increasing. However, there are substantial differences in estimates of the amount of carbon this forest contains, ranging from 3.92 to 17.02 Pg C for circa 2007. This makes it unclear how the changes in China's forest area contribute to the global carbon cycle. We generate a circa 2007 aboveground biomass (AGB) map at a resolution of 50 m using optical, radar and LiDAR satellite data. Our estimates of total carbon stored in the forest in China was 9.52 Pg C, with an average forest AGB of 104 Mg ha-1. Compared with three existing AGB maps, our AGB map showed better correlation with a distributed set of forest inventory plots. In addition, our high resolution AGB map provided more details on spatial distribution of forest AGB, and is likely to help understand the carbon storage changes in China's forest.
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Affiliation(s)
- Wenquan Dong
- School of GeoSciences, University of Edinburgh, Edinburgh, EH9 3FF, UK.
| | | | | | - Man Chen
- School of GeoSciences, University of Edinburgh, Edinburgh, EH9 3FF, UK.
| | - Charlotte E Wheeler
- Department of Plant Sciences and Conservation Research Institute, University of Cambridge, Cambridge, CB2 3EA, UK
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14
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Zandalinas SI, Peláez-Vico MÁ, Sinha R, Pascual LS, Mittler R. The impact of multifactorial stress combination on plants, crops, and ecosystems: how should we prepare for what comes next? Plant J 2024; 117:1800-1814. [PMID: 37996968 DOI: 10.1111/tpj.16557] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [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: 09/29/2023] [Revised: 10/27/2023] [Accepted: 11/10/2023] [Indexed: 11/25/2023]
Abstract
The complexity of environmental conditions encountered by plants in the field, or in nature, is gradually increasing due to anthropogenic activities that promote global warming, climate change, and increased levels of pollutants. While in the past it seemed sufficient to study how plants acclimate to one or even two different stresses affecting them simultaneously, the complex conditions developing on our planet necessitate a new approach of studying stress in plants: Acclimation to multiple stress conditions occurring concurrently or consecutively (termed, multifactorial stress combination [MFSC]). In an initial study of the plant response to MFSC, conducted with Arabidopsis thaliana seedlings subjected to an MFSC of six different abiotic stresses, it was found that with the increase in the number and complexity of different stresses simultaneously impacting a plant, plant growth and survival declined, even if the effects of each stress involved in such MFSC on the plant was minimal or insignificant. In three recent studies, conducted with different crop plants, MFSC was found to have similar effects on a commercial rice cultivar, a maize hybrid, tomato, and soybean, causing significant reductions in growth, biomass, physiological parameters, and/or yield traits. As the environmental conditions on our planet are gradually worsening, as well as becoming more complex, addressing MFSC and its effects on agriculture and ecosystems worldwide becomes a high priority. In this review, we address the effects of MFSC on plants, crops, agriculture, and different ecosystems worldwide, and highlight potential avenues to enhance the resilience of crops to MFSC.
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Affiliation(s)
- Sara I Zandalinas
- Department of Biology, Biochemistry and Environmental Sciences, University Jaume I, Av. de Vicent Sos Baynat, s/n, Castelló de la Plana, 12071, Spain
| | - María Ángeles Peláez-Vico
- Division of Plant Sciences and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, Missouri, 65211, USA
| | - Ranjita Sinha
- Division of Plant Sciences and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, Missouri, 65211, USA
| | - Lidia S Pascual
- Department of Biology, Biochemistry and Environmental Sciences, University Jaume I, Av. de Vicent Sos Baynat, s/n, Castelló de la Plana, 12071, Spain
| | - Ron Mittler
- Division of Plant Sciences and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, Missouri, 65211, USA
- Department of Surgery, University of Missouri School of Medicine, Christopher S. Bond Life Sciences Center University of Missouri, 1201 Rollins St, Columbia, Missouri, 65201, USA
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15
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Chen Z, Wang W, Forzieri G, Cescatti A. Transition from positive to negative indirect CO 2 effects on the vegetation carbon uptake. Nat Commun 2024; 15:1500. [PMID: 38374331 PMCID: PMC10876672 DOI: 10.1038/s41467-024-45957-x] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 02/08/2024] [Indexed: 02/21/2024] Open
Abstract
Although elevated atmospheric CO2 concentration (eCO2) has substantial indirect effects on vegetation carbon uptake via associated climate change, their dynamics remain unclear. Here we investigate how the impacts of eCO2-driven climate change on growing-season gross primary production have changed globally during 1982-2014, using satellite observations and Earth system models, and evaluate their evolution until the year 2100. We show that the initial positive effect of eCO2-induced climate change on vegetation carbon uptake has declined recently, shifting to negative in the early 21st century. Such emerging pattern appears prominent in high latitudes and occurs in combination with a decrease of direct CO2 physiological effect, ultimately resulting in a sharp reduction of the current growth benefits induced by climate warming and CO2 fertilization. Such weakening of the indirect CO2 effect can be partially attributed to the widespread land drying, and it is expected to be further exacerbated under global warming.
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Affiliation(s)
- Zefeng Chen
- National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China
- Yangtze Institute for Conservation and Development, Hohai University, Nanjing, China
- College of Hydrology and Water Resources, Hohai University, Nanjing, China
| | - Weiguang Wang
- National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China.
- Yangtze Institute for Conservation and Development, Hohai University, Nanjing, China.
- College of Hydrology and Water Resources, Hohai University, Nanjing, China.
| | - Giovanni Forzieri
- Department of Civil and Environmental Engineering, University of Florence, Florence, Italy
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16
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Dobor L, Baldo M, Bílek L, Barka I, Máliš F, Štěpánek P, Hlásny T. The interacting effect of climate change and herbivory can trigger large-scale transformations of European temperate forests. Glob Chang Biol 2024; 30:e17194. [PMID: 38385958 DOI: 10.1111/gcb.17194] [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: 03/02/2023] [Revised: 01/25/2024] [Accepted: 01/25/2024] [Indexed: 02/23/2024]
Abstract
In many regions of Europe, large wild herbivores alter forest community composition through their foraging preferences, hinder the forest's natural adaptive responses to climate change, and reduce ecosystem resilience. We investigated a widespread European forest type, a mixed forest dominated by Picea abies, which has recently experienced an unprecedented level of disturbance across the continent. Using the forest landscape model iLand, we investigated the combined effect of climate change and herbivory on forest structure, composition, and carbon and identified conditions leading to ecosystem transitions on a 300-year timescale. Eight climate change scenarios, driven by Representative Concentration Pathways 4.5 and 8.5, combined with three levels of regeneration browsing, were tested. We found that the persistence of the current level of browsing pressure impedes adaptive changes in community composition and sustains the presence of the vulnerable yet less palatable P. abies. These development trajectories were tortuous, characterized by a high disturbance intensity. On the contrary, reduced herbivory initiated a transformation towards the naturally dominant broadleaved species that was associated with an increased forest carbon and a considerably reduced disturbance. The conditions of RCP4.5 combined with high and moderate browsing levels preserved the forest within its reference range of variability, defining the actual boundaries of resilience. The remaining combinations of browsing and climate change led to ecosystem transitions. Under RCP4.5 with browsing effects excluded, the new equilibrium conditions were achieved within 120 years, whereas the stabilization was delayed by 50-100 years under RCP8.5 with higher browsing intensities. We conclude that forests dominated by P. abies are prone to transitions driven by climate change. However, reducing herbivory can set the forest on a stable and predictable trajectory, whereas sustaining the current browsing levels can lead to heightened disturbance activity, extended transition times, and high variability in the target conditions.
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Affiliation(s)
- Laura Dobor
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences in Prague, Prague 6, Suchdol, Czech Republic
| | - Marco Baldo
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences in Prague, Prague 6, Suchdol, Czech Republic
| | - Lukáš Bílek
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences in Prague, Prague 6, Suchdol, Czech Republic
| | - Ivan Barka
- National Forest Centre - Forest Research Institute Zvolen, Zvolen, Slovakia
| | - František Máliš
- National Forest Centre - Forest Research Institute Zvolen, Zvolen, Slovakia
- Faculty of Forestry, Technical University Zvolen, Zvolen, Slovakia
| | - Petr Štěpánek
- Global Change Research Institute, Czech Academy of Sciences, Prague, Czech Republic
| | - Tomáš Hlásny
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences in Prague, Prague 6, Suchdol, Czech Republic
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17
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Abstract
Tree canopies are one of the most recognizable features of forests, providing shelter from external influences to a myriad of species that live within and below the tree foliage. Canopy disturbances are now increasing across European forests, and climate-change-induced drought is a key driver, together with pests and pathogens, storms and fire. These disturbances are opening the canopy and exposing below-canopy biodiversity and functioning to novel light regimes-spatial and temporal characteristics of light distribution at forest floors not found previously. The majority of forest biodiversity occurs in the shade within and below tree canopies, and numerous ecosystem processes are regulated at the forest floor. Altered light regimes, in interaction with other global change drivers, can thus strongly impact forest biodiversity and functioning. As recent European droughts are unprecedented in the past two millennia, and this has initiated probably the largest pulse of forest disturbances in almost two centuries, we urgently need to quantify, understand and predict the impacts of novel light regimes on below-canopy forest biodiversity and functions. This will be a crucial element in delivering much-needed information for policymakers and managers to adapt European forests to future no-analogue conditions.
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18
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Hogan JA, Domke GM, Zhu K, Johnson DJ, Lichstein JW. Climate change determines the sign of productivity trends in US forests. Proc Natl Acad Sci U S A 2024; 121:e2311132121. [PMID: 38227667 PMCID: PMC10823222 DOI: 10.1073/pnas.2311132121] [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: 07/21/2023] [Accepted: 12/01/2023] [Indexed: 01/18/2024] Open
Abstract
Forests are integral to the global land carbon sink, which has sequestered ~30% of anthropogenic carbon emissions over recent decades. The persistence of this sink depends on the balance of positive drivers that increase ecosystem carbon storage-e.g., CO2 fertilization-and negative drivers that decrease it-e.g., intensifying disturbances. The net response of forest productivity to these drivers is uncertain due to the challenge of separating their effects from background disturbance-regrowth dynamics. We fit non-linear models to US forest inventory data (113,806 plot remeasurements in non-plantation forests from ~1999 to 2020) to quantify productivity trends while accounting for stand age, tree mortality, and harvest. Productivity trends were generally positive in the eastern United States, where climate change has been mild, and negative in the western United States, where climate change has been more severe. Productivity declines in the western United States cannot be explained by increased mortality or harvest; these declines likely reflect adverse climate-change impacts on tree growth. In the eastern United States, where data were available to partition biomass change into age-dependent and age-independent components, forest maturation and increasing productivity (likely due, at least in part, to CO2 fertilization) contributed roughly equally to biomass carbon sinks. Thus, adverse effects of climate change appear to overwhelm any positive drivers in the water-limited forests of the western United States, whereas forest maturation and positive responses to age-independent drivers contribute to eastern US carbon sinks. The future land carbon balance of forests will likely depend on the geographic extent of drought and heat stress.
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Affiliation(s)
- J. Aaron Hogan
- Department of Biology, University of Florida, Gainesville, FL32611
| | - Grant M. Domke
- Northern Research Station, United States Department of Agriculture Forest Service, Saint Paul, MN55108
| | - Kai Zhu
- School for Environment and Sustainability, University of Michigan, Ann Arbor, MI48109
| | - Daniel J. Johnson
- School of Forest, Fisheries, and Geomatics Sciences, University of Florida, Gainesville, FL32611
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19
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Lech P, Kamińska A. "Mortality, or not mortality, that is the question …": How to Treat Removals in Tree Survival Analysis of Central European Managed Forests. Plants (Basel) 2024; 13:248. [PMID: 38256801 PMCID: PMC10820843 DOI: 10.3390/plants13020248] [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] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 01/09/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024]
Abstract
Tree mortality is an objective forest health criterion and is particularly suitable for long-term and large-scale studies of forest condition. However, it is impossible to determine actual tree mortality in Central European managed forests where trees are removed for various reasons. In this case, the only way to approximate tree mortality is to define the range in which it occurs. This can be carried out by including in the mortality calculations either dead trees that remain in the stand at the end of the assessment period or additionally trees that have been removed from the stand. We used data from the annual forest monitoring surveys in Poland from 2009 to 2022 for pine, spruce, oak and birch to perform a survival analysis in which we included all removals or sanitary cuttings either as censored or complete observations. The differences between the calculated mortality rates were significant, indicating the importance of how removals are treated in the analysis. To assess which method used for mortality calculation was more appropriate, we compared values for last recorded defoliation and severity of damage from live, dead and thinned or salvaged trees. For all species studied, significant differences were found between dead trees or trees removed by sanitation cuts and living trees or trees removed by thinning, suggesting that not only dead trees remaining in the forest, but also trees removed by sanitation cuts, should be considered when calculating mortality in managed stands. We also recommend the use of survival analysis in forest monitoring as a routine method for assessing the health of stands.
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Affiliation(s)
- Paweł Lech
- Department of Forest Resources Management, Forest Research Institute, Sękocin Stary, ul. Braci Leśnej 3, 05-090 Raszyn, Poland
| | - Agnieszka Kamińska
- Department of Geomatics, Forest Research Institute, Sękocin Stary, ul. Braci Leśnej 3, 05-090 Raszyn, Poland;
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20
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Braziunas KH, Geres L, Richter T, Glasmann F, Senf C, Thom D, Seibold S, Seidl R. Projected climate and canopy change lead to thermophilization and homogenization of forest floor vegetation in a hotspot of plant species richness. Glob Chang Biol 2024; 30:e17121. [PMID: 38273493 DOI: 10.1111/gcb.17121] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 06/15/2023] [Revised: 12/06/2023] [Accepted: 12/15/2023] [Indexed: 01/27/2024]
Abstract
Mountain forests are plant diversity hotspots, but changing climate and increasing forest disturbances will likely lead to far-reaching plant community change. Projecting future change, however, is challenging for forest understory plants, which respond to forest structure and composition as well as climate. Here, we jointly assessed the effects of both climate and forest change, including wind and bark beetle disturbances, using the process-based simulation model iLand in a protected landscape in the northern Alps (Berchtesgaden National Park, Germany), asking: (1) How do understory plant communities respond to 21st-century change in a topographically complex mountain landscape, representing a hotspot of plant species richness? (2) How important are climatic changes (i.e., direct climate effects) versus forest structure and composition changes (i.e., indirect climate effects and recovery from past land use) in driving understory responses at landscape scales? Stacked individual species distribution models fit with climate, forest, and soil predictors (248 species currently present in the landscape, derived from 150 field plots stratified by elevation and forest development, overall area under the receiving operator characteristic curve = 0.86) were driven with projected climate (RCP4.5 and RCP8.5) and modeled forest variables to predict plant community change. Nearly all species persisted in the landscape in 2050, but on average 8% of the species pool was lost by the end of the century. By 2100, landscape mean species richness and understory cover declined (-13% and -8%, respectively), warm-adapted species increasingly dominated plant communities (i.e., thermophilization, +12%), and plot-level turnover was high (62%). Subalpine forests experienced the greatest richness declines (-16%), most thermophilization (+17%), and highest turnover (67%), resulting in plant community homogenization across elevation zones. Climate rather than forest change was the dominant driver of understory responses. The magnitude of unabated 21st-century change is likely to erode plant diversity in a species richness hotspot, calling for stronger conservation and climate mitigation efforts.
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Affiliation(s)
- Kristin H Braziunas
- Ecosystem Dynamics and Forest Management Group, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Lisa Geres
- Berchtesgaden National Park, Berchtesgaden, Germany
- Faculty of Biological Sciences, Institute for Ecology, Evolution and Diversity, Conservation Biology, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Tobias Richter
- Ecosystem Dynamics and Forest Management Group, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- Berchtesgaden National Park, Berchtesgaden, Germany
| | - Felix Glasmann
- Professorship of Forest and Agroforest Systems, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Cornelius Senf
- Ecosystem Dynamics and Forest Management Group, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Dominik Thom
- Ecosystem Dynamics and Forest Management Group, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Sebastian Seibold
- Ecosystem Dynamics and Forest Management Group, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- Berchtesgaden National Park, Berchtesgaden, Germany
- Forest Zoology, Technische Universität Dresden, Tharandt, Germany
| | - Rupert Seidl
- Ecosystem Dynamics and Forest Management Group, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- Berchtesgaden National Park, Berchtesgaden, Germany
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21
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Xu X, van der Sleen P, Groenendijk P, Vlam M, Medvigy D, Moorcroft P, Petticord D, Ma Y, Zuidema PA. Constraining long-term model predictions for woody growth using tropical tree rings. Glob Chang Biol 2024; 30:e17075. [PMID: 38273586 DOI: 10.1111/gcb.17075] [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: 08/18/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 01/27/2024]
Abstract
The strength and persistence of the tropical carbon sink hinges on the long-term responses of woody growth to climatic variations and increasing CO2 . However, the sensitivity of tropical woody growth to these environmental changes is poorly understood, leading to large uncertainties in growth predictions. Here, we used tree ring records from a Southeast Asian tropical forest to constrain ED2.2-hydro, a terrestrial biosphere model with explicit vegetation demography. Specifically, we assessed individual-level woody growth responses to historical climate variability and increases in atmospheric CO2 (Ca ). When forced with historical Ca , ED2.2-hydro reproduced the magnitude of increases in intercellular CO2 concentration (a major determinant of photosynthesis) estimated from tree ring carbon isotope records. In contrast, simulated growth trends were considerably larger than those obtained from tree rings, suggesting that woody biomass production efficiency (WBPE = woody biomass production:gross primary productivity) was overestimated by the model. The estimated WBPE decline under increasing Ca based on model-data discrepancy was comparable to or stronger than (depending on tree species and size) the observed WBPE changes from a multi-year mature-forest CO2 fertilization experiment. In addition, we found that ED2.2-hydro generally overestimated climatic sensitivity of woody growth, especially for late-successional plant functional types. The model-data discrepancy in growth sensitivity to climate was likely caused by underestimating WBPE in hot and dry years due to commonly used model assumptions on carbon use efficiency and allocation. To our knowledge, this is the first study to constrain model predictions of individual tree-level growth sensitivity to Ca and climate against tropical tree-ring data. Our results suggest that improving model processes related to WBPE is crucial to obtain better predictions of tropical forest responses to droughts and increasing Ca . More accurate parameterization of WBPE will likely reduce the stimulation of woody growth by Ca rise predicted by biosphere models.
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Affiliation(s)
- Xiangtao Xu
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Peter van der Sleen
- Forest Ecology & Forest Management Group, Wageningen University, Wageningen, The Netherlands
| | - Peter Groenendijk
- Department of Plant Biology, Institute of Biology, University of Campinas, UNICAMP, Campinas, SP, Brazil
| | - Mart Vlam
- Forest Ecology & Forest Management Group, Wageningen University, Wageningen, The Netherlands
| | - David Medvigy
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, USA
| | - Paul Moorcroft
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, USA
| | - Daniel Petticord
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Yixin Ma
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Pieter A Zuidema
- Forest Ecology & Forest Management Group, Wageningen University, Wageningen, The Netherlands
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22
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Mayer M, Baltensweiler A, James J, Rigling A, Hagedorn F. A global synthesis and conceptualization of the magnitude and duration of soil carbon losses in response to forest disturbances. Glob Ecol Biogeogr 2024; 33:141-150. [PMID: 38516344 PMCID: PMC10953364 DOI: 10.1111/geb.13779] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/06/2023] [Accepted: 10/13/2023] [Indexed: 03/23/2024]
Abstract
Aim Forest disturbances are increasing around the globe due to changes in climate and management, deteriorating forests' carbon sink strength. Estimates of global forest carbon budgets account for losses of plant biomass but often neglect the effects of disturbances on soil organic carbon (SOC). Here, we aimed to quantify and conceptualize SOC losses in response to different disturbance agents on a global scale. Location Global. Time Period 1983-2022. Major Taxa Studied Forest soils. Methods We conducted a comprehensive global analysis of the effects of harvesting, wildfires, windstorms and insect infestations on forest SOC stocks in the surface organic layer and top mineral soil, synthesizing 927 paired observations from 151 existing field studies worldwide. We further used global mapping to assess potential SOC losses upon disturbance. Results We found that both natural and anthropogenic forest disturbances can cause large SOC losses up to 60 Mg ha-1. On average, the largest SOC losses were found after wildfires, followed by disturbances from windstorms, harvests and insects. However, initial carbon stock size, rather than disturbance agent, had the strongest influence on the magnitude of SOC losses. SOC losses were greatest in cold-climate forests (boreal and mountainous regions) with large accumulations of organic matter on or near the soil surface. Negative effects are present for at least four decades post-disturbance. In contrast, forests with small initial SOC stocks experienced quantitatively lower carbon losses, and their stocks returned to pre-disturbance levels more quickly. Main Conclusions Our results indicate that the more carbon is stored in the forest's organic layers and top mineral soils, the more carbon will be lost after disturbance. Robust estimates of forest carbon budgets must therefore consider disturbance-induced SOC losses, which strongly depend on site-specific stocks. Particularly in cold-climate forests, these disturbance-related losses may challenge forest management efforts to sequester CO2.
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Affiliation(s)
- Mathias Mayer
- Forest Soils and BiogeochemistrySwiss Federal Institute for Forest, Snow and Landscape Research (WSL)BirmensdorfSwitzerland
- Forest Ecology, Institute of Terrestrial Ecosystems (ITES)ETH ZurichZurichSwitzerland
- Institute of Forest Ecology, Department of Forest and Soil SciencesUniversity of Natural Resources and Life Sciences (BOKU)ViennaAustria
| | - Andri Baltensweiler
- Forest Resources and ManagementSwiss Federal Institute for Forest, Snow and Landscape Research (WSL)BirmensdorfSwitzerland
| | | | - Andreas Rigling
- Forest Ecology, Institute of Terrestrial Ecosystems (ITES)ETH ZurichZurichSwitzerland
- Forest DynamicsSwiss Federal Institute for Forest, Snow and Landscape Research (WSL)BirmensdorfSwitzerland
| | - Frank Hagedorn
- Forest Soils and BiogeochemistrySwiss Federal Institute for Forest, Snow and Landscape Research (WSL)BirmensdorfSwitzerland
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23
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Meili N, Beringer J, Zhao J, Fatichi S. Aerodynamic effects cause higher forest evapotranspiration and water yield reductions after wildfires in tall forests. Glob Chang Biol 2024; 30:e16995. [PMID: 37916642 DOI: 10.1111/gcb.16995] [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: 03/20/2023] [Revised: 10/02/2023] [Accepted: 10/06/2023] [Indexed: 11/03/2023]
Abstract
Wildfires are increasing in frequency, intensity, and extent globally due to climate change and they can alter forest composition, structure, and function. The destruction and subsequent regrowth of young vegetation can modify the ecosystem evapotranspiration and downstream water availability. However, the response of forest recovery on hydrology is not well known with even the sign of evapotranspiration and water yield changes following forest fires being uncertain across the globe. Here, we quantify the effects of forest regrowth after catastrophic wildfires on evapotranspiration and runoff in the world's tallest angiosperm forest (Eucalyptus regnans) in Australia. We combine eddy covariance measurements including pre- and post-fire periods, mechanistic ecohydrological modeling and then extend the analysis spatially to multiple fires in eucalypt-dominated forests in south-eastern Australia by utilizing remote sensing. We find a fast recovery of evapotranspiration which reaches and exceeds pre-fire values within 2 years after the bushfire, a result confirmed by eddy covariance data, remote sensing, and modeling. Such a fast evapotranspiration recovery is likely generalizable to tall eucalypt forests in south-eastern Australia as shown by remote sensing. Once climate variability is discounted, ecohydrological modeling shows evapotranspiration rates from the recovering forest which reach peak values of +20% evapotranspiration 3 years post-fire. As a result, modeled runoff decreases substantially. Contrary to previous research, we find that the increase in modeled evapotranspiration is largely caused by the aerodynamic effects of a much shorter forest height leading to higher surface temperature, higher humidity gradients and therefore increased transpiration. However, increases in evapotranspiration as well as decreases in runoff caused by the young forest are constrained by energy and water limitations. Our result of an increase in evapotranspiration due to aerodynamic warming in a shorter forest after wildfires could occur in many parts of the world experiencing forest disturbances.
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Affiliation(s)
- Naika Meili
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, Singapore
- Future Cities Laboratory Global, Singapore-ETH Centre, Singapore, Singapore
| | - Jason Beringer
- School of Agriculture and Environment, University of Western Australia, Crawley, Western Australia, Australia
| | - Jiacheng Zhao
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China
| | - Simone Fatichi
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, Singapore
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24
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Pugh TAM, Seidl R, Liu D, Lindeskog M, Chini LP, Senf C. The anthropogenic imprint on temperate and boreal forest demography and carbon turnover. Glob Ecol Biogeogr 2024; 33:100-115. [PMID: 38516343 PMCID: PMC10952773 DOI: 10.1111/geb.13773] [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: 01/11/2023] [Revised: 08/25/2023] [Accepted: 09/28/2023] [Indexed: 03/23/2024]
Abstract
Aim The sweeping transformation of the biosphere by humans over the last millennia leaves only limited windows into its natural state. Much of the forests that dominated temperate and southern boreal regions have been lost and those that remain typically bear a strong imprint of forestry activities and past land-use change, which have changed forest age structure and composition. Here, we ask how would the dynamics, structure and function of temperate and boreal forests differ in the absence of forestry and the legacies of land-use change? Location Global. Time Period 2001-2014, integrating over the legacy of disturbance events from 1875 to 2014. Major Taxa Studied Trees. Methods We constructed an empirical model of natural disturbance probability as a function of community traits and climate, based on observed disturbance rate and form across 77 protected forest landscapes distributed across three continents. Coupling this within a dynamic vegetation model simulating forest composition and structure, we generated estimates of stand-replacing disturbance return intervals in the absence of forestry for northern hemisphere temperate and boreal forests. We then applied this model to calculate forest stand age structure and carbon turnover rates. Results Comparison with observed disturbance rates revealed human activities to have almost halved the median return interval of stand-replacing disturbances across temperate forest, with more moderate changes in the boreal region. The resulting forests are typically much younger, especially in northern Europe and south-eastern North America, resulting in a 32% reduction in vegetation carbon turnover time across temperate forests and a 7% reduction for boreal forests. Conclusions The current northern hemisphere temperate forest age structure is dramatically out of equilibrium with its natural disturbance regimes. Shifts towards more nature-based approaches to forest policy and management should more explicitly consider the current disturbance surplus, as it substantially impacts carbon dynamics and litter (including deadwood) stocks.
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Affiliation(s)
- Thomas A. M. Pugh
- Department of Physical Geography and Ecosystem ScienceLund UniversityLundSweden
- School of Geography, Earth and Environmental ScienceUniversity of BirminghamBirminghamUK
- Birmingham Institute of Forest ResearchUniversity of BirminghamBirminghamUK
| | - Rupert Seidl
- Ecosystem dynamics and forest management groupTechnical University of MunichFreisingGermany
- Berchtesgaden National ParkBerchtesgadenGermany
| | - Daijun Liu
- School of Geography, Earth and Environmental ScienceUniversity of BirminghamBirminghamUK
- Birmingham Institute of Forest ResearchUniversity of BirminghamBirminghamUK
- Department of Botany and Biodiversity ResearchUniversity of ViennaViennaAustria
| | - Mats Lindeskog
- Department of Physical Geography and Ecosystem ScienceLund UniversityLundSweden
| | - Louise P. Chini
- Department of Geographical SciencesUniversity of MarylandCollege ParkMarylandUSA
| | - Cornelius Senf
- Ecosystem dynamics and forest management groupTechnical University of MunichFreisingGermany
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25
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Kašpar J, Tumajer J, Altman J, Altmanová N, Čada V, Čihák T, Doležal J, Fibich P, Janda P, Kaczka R, Kolář T, Lehejček J, Mašek J, Hellebrandová KN, Rybníček M, Rydval M, Shetti R, Svoboda M, Šenfeldr M, Šamonil P, Vašíčková I, Vejpustková M, Treml V. Major tree species of Central European forests differ in their proportion of positive, negative, and nonstationary growth trends. Glob Chang Biol 2024; 30:e17146. [PMID: 38273515 DOI: 10.1111/gcb.17146] [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: 08/19/2023] [Revised: 12/08/2023] [Accepted: 12/15/2023] [Indexed: 01/27/2024]
Abstract
Temperate forests are undergoing significant transformations due to the influence of climate change, including varying responses of different tree species to increasing temperature and drought severity. To comprehensively understand the full range of growth responses, representative datasets spanning extensive site and climatic gradients are essential. This study utilizes tree-ring data from 550 sites from the temperate forests of Czechia to assess growth trends of six dominant Central European tree species (European beech, Norway spruce, Scots pine, silver fir, sessile and pedunculate oak) over 1990-2014. By modeling mean growth series for each species and site, and employing principal component analysis, we identified the predominant growth trends. Over the study period, linear growth trends were evident across most sites (56% increasing, 32% decreasing, and 10% neutral). The proportion of sites with stationary positive trends increased from low toward high elevations, whereas the opposite was true for the stationary negative trends. Notably, within the middle range of their distribution (between 500 and 700 m a.s.l.), Norway spruce and European beech exhibited a mix of positive and negative growth trends. While Scots pine growth trends showed no clear elevation-based pattern, silver fir and oaks displayed consistent positive growth trends regardless of site elevation, indicating resilience to the ongoing warming. We demonstrate divergent growth trajectories across space and among species. These findings are particularly important as recent warming has triggered a gradual shift in the elevation range of optimal growth conditions for most tree species and has also led to a decoupling of growth trends between lowlands and mountain areas. As a result, further future shifts in the elevation range and changes in species diversity of European temperate forests can be expected.
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Affiliation(s)
- Jakub Kašpar
- Department of Forest Ecology, The Silva Tarouca Research Institute, Brno, Czech Republic
| | - Jan Tumajer
- Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Altman
- Institute of Botany of the Czech Academy of Sciences, Třeboň, Czech Republic
- Department of Forest Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Nela Altmanová
- Institute of Botany of the Czech Academy of Sciences, Třeboň, Czech Republic
- Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Vojtěch Čada
- Department of Forest Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Tomáš Čihák
- Forestry and Game Management Research Institute, Praha, Czech Republic
| | - Jiří Doležal
- Institute of Botany of the Czech Academy of Sciences, Třeboň, Czech Republic
- Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Pavel Fibich
- Institute of Botany of the Czech Academy of Sciences, Třeboň, Czech Republic
- Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Pavel Janda
- Department of Forest Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Ryszard Kaczka
- Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Tomáš Kolář
- Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic
- Global Change Research Institute of the Czech Academy of Science, Brno, Czech Republic
| | - Jiří Lehejček
- Department of Environment, Faculty of Environment, University of Jan Evangelista Purkyně, Ústí nad Labem, Czech Republic
| | - Jiří Mašek
- Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Prague, Czech Republic
| | | | - Michal Rybníček
- Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic
- Global Change Research Institute of the Czech Academy of Science, Brno, Czech Republic
| | - Miloš Rydval
- Department of Forest Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Rohan Shetti
- Department of Environment, Faculty of Environment, University of Jan Evangelista Purkyně, Ústí nad Labem, Czech Republic
| | - Miroslav Svoboda
- Department of Forest Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Martin Šenfeldr
- Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic
| | - Pavel Šamonil
- Department of Forest Ecology, The Silva Tarouca Research Institute, Brno, Czech Republic
- Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic
| | - Ivana Vašíčková
- Department of Forest Ecology, The Silva Tarouca Research Institute, Brno, Czech Republic
| | | | - Václav Treml
- Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Prague, Czech Republic
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26
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Alderotti F, Sillo F, Brilli L, Bussotti F, Centritto M, Ferrini F, Gori A, Inghes R, Pasquini D, Pollastrini M, Saurer M, Cherubini P, Balestrini R, Brunetti C. Quercus ilex L. dieback is genetically determined: Evidence provided by dendrochronology, δ 13C and SSR genotyping. Sci Total Environ 2023; 904:166809. [PMID: 37690750 DOI: 10.1016/j.scitotenv.2023.166809] [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: 04/14/2023] [Revised: 08/20/2023] [Accepted: 09/02/2023] [Indexed: 09/12/2023]
Abstract
Quercus ilex L. dieback has been reported in several Mediterranean forests, revealing different degree of crown damages even in close sites, as observed in two Q. ilex forest stands in southern Tuscany (IT). In this work, we applied a novel approach combining dendrochronological, tree-ring δ13C and genetic analysis to test the hypothesis that different damage levels observed in a declining (D) and non-declining (ND) Q. ilex stands are connected to population features linked to distinct response to drought. Furthermore, we investigated the impact of two major drought events (2012 and 2017), that occurred in the last fifteen years in central Italy, on Q. ilex growth and intrinsic water use efficiency (WUEi). Overall, Q. ilex showed slightly different ring-width patterns between the two stands, suggesting a lower responsiveness to seasonal climatic variations for trees at D stand, while Q. ilex at ND stand showed changes in the relationship between climatic parameters and growth across time. The strong divergence in δ13C signals between the two stands suggested a more conservative use of water for Q. ilex at ND compared to D stand that may be genetically driven. Q. ilex at ND resulted more resilient to drought compared to trees at D, probably thanks to its safer water strategy. Genotyping analysis based on simple-sequence repeat (SSR) markers revealed the presence of different Q. ilex populations at D and ND stands. Our study shows intraspecific variations in drought response among trees grown in close. In addition, it highlights the potential of combining tree-ring δ13C data with SSR genotyping for the selection of seed-bearing genotypes aimed to preserve Mediterranean holm oak ecosystem and improve its forest management.
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Affiliation(s)
- Francesca Alderotti
- University of Florence, Department of Agriculture, Food, Environment and Forestry, Viale delle idee 30, 50019 Sesto Fiorentino, Piazzale delle Cascine 28, 50144 Florence, Italy; National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy
| | - Fabiano Sillo
- National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy
| | - Lorenzo Brilli
- CNR-IBE, National Research Council of Italy (CNR), Institute for the BioEconomy, Via Caproni 8, 50145 Firenze, Italy
| | - Filippo Bussotti
- University of Florence, Department of Agriculture, Food, Environment and Forestry, Viale delle idee 30, 50019 Sesto Fiorentino, Piazzale delle Cascine 28, 50144 Florence, Italy
| | - Mauro Centritto
- National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy
| | - Francesco Ferrini
- University of Florence, Department of Agriculture, Food, Environment and Forestry, Viale delle idee 30, 50019 Sesto Fiorentino, Piazzale delle Cascine 28, 50144 Florence, Italy; National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy; National Biodiversity Future Center (www.nfbc.it), Italy
| | - Antonella Gori
- University of Florence, Department of Agriculture, Food, Environment and Forestry, Viale delle idee 30, 50019 Sesto Fiorentino, Piazzale delle Cascine 28, 50144 Florence, Italy; National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy
| | - Roberto Inghes
- National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy
| | - Dalila Pasquini
- University of Florence, Department of Agriculture, Food, Environment and Forestry, Viale delle idee 30, 50019 Sesto Fiorentino, Piazzale delle Cascine 28, 50144 Florence, Italy
| | - Martina Pollastrini
- University of Florence, Department of Agriculture, Food, Environment and Forestry, Viale delle idee 30, 50019 Sesto Fiorentino, Piazzale delle Cascine 28, 50144 Florence, Italy; National Biodiversity Future Center (www.nfbc.it), Italy
| | - Matthias Saurer
- WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland
| | - Paolo Cherubini
- WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland; University of British Columbia, Department of Forest and Conservation Sciences, Vancouver, BC, Canada
| | - Raffaella Balestrini
- National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy
| | - Cecilia Brunetti
- University of Florence, Department of Agriculture, Food, Environment and Forestry, Viale delle idee 30, 50019 Sesto Fiorentino, Piazzale delle Cascine 28, 50144 Florence, Italy; National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy; Strada delle Cacce 73, 10135, Torino, Italy.
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27
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Rodman KC, Davis KT, Parks SA, Chapman TB, Coop JD, Iniguez JM, Roccaforte JP, Sánchez Meador AJ, Springer JD, Stevens-Rumann CS, Stoddard MT, Waltz AEM, Wasserman TN. Refuge-yeah or refuge-nah? Predicting locations of forest resistance and recruitment in a fiery world. Glob Chang Biol 2023; 29:7029-7050. [PMID: 37706328 DOI: 10.1111/gcb.16939] [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: 02/23/2023] [Revised: 08/25/2023] [Accepted: 08/31/2023] [Indexed: 09/15/2023]
Abstract
Climate warming, land use change, and altered fire regimes are driving ecological transformations that can have critical effects on Earth's biota. Fire refugia-locations that are burned less frequently or severely than their surroundings-may act as sites of relative stability during this period of rapid change by being resistant to fire and supporting post-fire recovery in adjacent areas. Because of their value to forest ecosystem persistence, there is an urgent need to anticipate where refugia are most likely to be found and where they align with environmental conditions that support post-fire tree recruitment. Using biophysical predictors and patterns of burn severity from 1180 recent fire events, we mapped the locations of potential fire refugia across upland conifer forests in the southwestern United States (US) (99,428 km2 of forest area), a region that is highly vulnerable to fire-driven transformation. We found that low pre-fire forest cover, flat slopes or topographic concavities, moderate weather conditions, spring-season burning, and areas affected by low- to moderate-severity fire within the previous 15 years were most commonly associated with refugia. Based on current (i.e., 2021) conditions, we predicted that 67.6% and 18.1% of conifer forests in our study area would contain refugia under moderate and extreme fire weather, respectively. However, potential refugia were 36.4% (moderate weather) and 31.2% (extreme weather) more common across forests that experienced recent fires, supporting the increased use of prescribed and resource objective fires during moderate weather conditions to promote fire-resistant landscapes. When overlaid with models of tree recruitment, 23.2% (moderate weather) and 6.4% (extreme weather) of forests were classified as refugia with a high potential to support post-fire recruitment in the surrounding landscape. These locations may be disproportionately valuable for ecosystem sustainability, providing habitat for fire-sensitive species and maintaining forest persistence in an increasingly fire-prone world.
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Affiliation(s)
- Kyle C Rodman
- Ecological Restoration Institute, Northern Arizona University, Flagstaff, Arizona, USA
| | - Kimberley T Davis
- Fire Sciences Laboratory, Rocky Mountain Research Station, USDA Forest Service, Missoula, Montana, USA
| | - Sean A Parks
- Aldo Leopold Wilderness Research Institute, Rocky Mountain Research Station, USDA Forest Service, Missoula, Montana, USA
| | - Teresa B Chapman
- Monitoring, Evaluation, and Learning Program, Chief Conservation Office, The Nature Conservancy, Arlington, Virginia, USA
| | - Jonathan D Coop
- Clark School of Environment and Sustainability, Western Colorado University, Gunnison, Colorado, USA
| | - Jose M Iniguez
- Rocky Mountain Research Station, USDA Forest Service, Flagstaff, Arizona, USA
| | - John P Roccaforte
- Ecological Restoration Institute, Northern Arizona University, Flagstaff, Arizona, USA
| | - Andrew J Sánchez Meador
- Ecological Restoration Institute, Northern Arizona University, Flagstaff, Arizona, USA
- School of Forestry, Northern Arizona University, Flagstaff, Arizona, USA
| | - Judith D Springer
- Ecological Restoration Institute, Northern Arizona University, Flagstaff, Arizona, USA
| | - Camille S Stevens-Rumann
- Colorado Forest Restoration Institute, Colorado State University, Fort Collins, Colorado, USA
- Department of Forest and Rangeland Stewardship, Colorado State University, Fort Collins, Colorado, USA
| | - Michael T Stoddard
- Ecological Restoration Institute, Northern Arizona University, Flagstaff, Arizona, USA
| | - Amy E M Waltz
- Ecological Restoration Institute, Northern Arizona University, Flagstaff, Arizona, USA
| | - Tzeidle N Wasserman
- Ecological Restoration Institute, Northern Arizona University, Flagstaff, Arizona, USA
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28
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Petek-Petrik A, Petrík P, Lamarque LJ, Cochard H, Burlett R, Delzon S. Drought survival in conifer species is related to the time required to cross the stomatal safety margin. J Exp Bot 2023; 74:6847-6859. [PMID: 37681745 DOI: 10.1093/jxb/erad352] [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: 03/05/2023] [Accepted: 09/07/2023] [Indexed: 09/09/2023]
Abstract
The regulation of water loss and the spread of xylem embolism have mostly been considered separately. The development of an integrated approach taking into account the temporal dynamics and relative contributions of these mechanisms to plant drought responses is urgently needed. Do conifer species native to mesic and xeric environments display different hydraulic strategies and temporal sequences under drought? A dry-down experiment was performed on seedlings of four conifer species differing in embolism resistance, from drought-sensitive to extremely drought-resistant species. A set of traits related to drought survival was measured, including turgor loss point, stomatal closure, minimum leaf conductance, and xylem embolism resistance. All species reached full stomatal closure before the onset of embolism, with all but the most drought-sensitive species presenting large stomatal safety margins, demonstrating that highly drought-resistant species do not keep their stomata open under drought conditions. Plant dry-down time to death was significantly influenced by the xylem embolism threshold, stomatal safety margin, and minimum leaf conductance, and was best explained by the newly introduced stomatal margin retention index (SMRIΨ50) which reflects the time required to cross the stomatal safety margin. The SMRIΨ50 may become a key tool for the characterization of interspecific drought survival variability in trees.
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Affiliation(s)
- Anja Petek-Petrik
- Department of Vegetation Ecology, Institute of Botany, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Peter Petrík
- Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research-Atmospheric Environmental Research (IMK-IFU), 82467 Garmisch-Partenkirchen, Germany
| | - Laurent J Lamarque
- BIOGECO, University of Bordeaux, INRAE, F-33615 Pessac, France
- Département des Sciences de l'Environnement, UQTR, Trois-Rivières, Québec, Canada
| | - Hervé Cochard
- PIAF, University of Clermont Auvergne, INRAE, 63000 Clermont-Ferrand, France
| | - Régis Burlett
- BIOGECO, University of Bordeaux, INRAE, F-33615 Pessac, France
| | - Sylvain Delzon
- BIOGECO, University of Bordeaux, INRAE, F-33615 Pessac, France
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29
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Ma Q, Su Y, Niu C, Ma Q, Hu T, Luo X, Tai X, Qiu T, Zhang Y, Bales RC, Liu L, Kelly M, Guo Q. Tree mortality during long-term droughts is lower in structurally complex forest stands. Nat Commun 2023; 14:7467. [PMID: 37978191 PMCID: PMC10656564 DOI: 10.1038/s41467-023-43083-8] [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: 04/20/2023] [Accepted: 10/31/2023] [Indexed: 11/19/2023] Open
Abstract
Increasing drought frequency and severity in a warming climate threaten forest ecosystems with widespread tree deaths. Canopy structure is important in regulating tree mortality during drought, but how it functions remains controversial. Here, we show that the interplay between tree size and forest structure explains drought-induced tree mortality during the 2012-2016 California drought. Through an analysis of over one million trees, we find that tree mortality rate follows a "negative-positive-negative" piecewise relationship with tree height, and maintains a consistent negative relationship with neighborhood canopy structure (a measure of tree competition). Trees overshadowed by tall neighboring trees experienced lower mortality, likely due to reduced exposure to solar radiation load and lower water demand from evapotranspiration. Our findings demonstrate the significance of neighborhood canopy structure in influencing tree mortality and suggest that re-establishing heterogeneity in canopy structure could improve drought resiliency. Our study also indicates the potential of advances in remote-sensing technologies for silvicultural design, supporting the transition to multi-benefit forest management.
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Affiliation(s)
- Qin Ma
- School of Geography, Nanjing Normal University, Nanjing, 210023, China
- Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing, 210023, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China
| | - Yanjun Su
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, China.
- China National Botanical Garden, 100093, Beijing, China.
- University of Chinese Academy of Sciences, 100049, Beijing, China.
| | - Chunyue Niu
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, China
- China National Botanical Garden, 100093, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Qin Ma
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, China
- China National Botanical Garden, 100093, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Tianyu Hu
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, China
- China National Botanical Garden, 100093, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Xiangzhong Luo
- Department of Geography, National University of Singapore, Singapore, 117570, Singapore
| | - Xiaonan Tai
- Department of Biological Sciences, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Tong Qiu
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA
| | - Yao Zhang
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, 100871, Beijing, China
| | - Roger C Bales
- Sierra Nevada Research Institute and School of Engineering, University of California, Merced, CA, 95343, USA
| | - Lingli Liu
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, China
- China National Botanical Garden, 100093, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Maggi Kelly
- Department of Environmental Sciences, Policy and Management, University of California, Berkeley, CA, 94720, USA
- Division of Agriculture and Natural Resources, University of California, Berkeley, CA, 94720, USA
| | - Qinghua Guo
- Institute of Remote Sensing and Geographical Information Systems, School of Earth and Space Sciences, Peking University, Beijing, 100871, China
- Institute of Ecology, College of Urban and Environmental Science, Peking University, 100871, Beijing, China
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30
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Westergren M, Archambeau J, Bajc M, Damjanić R, Theraroz A, Kraigher H, Oddou-Muratorio S, González-Martínez SC. Low but significant evolutionary potential for growth, phenology and reproduction traits in European beech. Mol Ecol 2023. [PMID: 37962106 DOI: 10.1111/mec.17196] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/23/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023]
Abstract
Local survival of forest tree populations under climate change depends on existing genetic variation and their adaptability to changing environments. Responses to selection were studied in European beech (Fagus sylvatica) under field conditions. A total of 1087 adult trees, seeds, 1-year-old seedlings and established multiyear saplings were genotyped with 16 nuSSRs. Adult trees were assessed for phenotypic traits related to growth, phenology and reproduction. Parentage and paternity analyses were used to estimate effective female and male fecundity as a proxy of fitness and showed that few parents contributed to successful regeneration. Selection gradients were estimated from the relationship between traits and fecundity, while heritability and evolvability were estimated using mixed models and the breeder's equation. Larger trees bearing more fruit and early male flowering had higher total fecundity, while trees with longer growth season had lower total fecundity (directional selection). Stabilizing selection on spring phenology was found for female fecundity, highlighting the role of late frosts as a selection driver. Selection gradients for other traits varied between measurement years and the offspring cohort used to estimate parental fecundity. Compared to other studies in natural populations, we found low to moderate heritability and evolvability for most traits. Response to selection was higher for growth than for budburst, leaf senescence or reproduction traits, reflecting more consistent selection gradients across years and sex functions, and higher phenotypic variability in the population. Our study provides empirical evidence suggesting that populations of long-lived organisms such as forest trees can adapt locally, even at short-time scales.
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Affiliation(s)
| | | | - Marko Bajc
- Slovenian Forestry Institute, Ljubljana, Slovenia
| | - Rok Damjanić
- Slovenian Forestry Institute, Ljubljana, Slovenia
| | | | | | - Sylvie Oddou-Muratorio
- INRAE, URFM, Avignon, France
- INRAE, Univ. de Pau et des Pays de l'Adour, E2S UPPA, ECOBIOP, Saint-Pée-sur-Nivelle, France
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31
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Zhang B, Hastings A, Grosholz ED, Zhai L. The comparison of dispersal rate between invasive and native species varied by plant life form and functional traits. Mov Ecol 2023; 11:73. [PMID: 37924137 PMCID: PMC10623791 DOI: 10.1186/s40462-023-00424-y] [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: 03/06/2023] [Accepted: 09/14/2023] [Indexed: 11/06/2023]
Abstract
A long dispersal distance is widely used to indicate high invasiveness, but it ignores the temporal dimensions of plant invasion. Faster dispersal rates (= distance/time) of invasive species than native ones have been widely used in modeling species invasion and planning control management. However, the comparison of dispersal rate between invasive and native plants, particularly for dispersal on a local or landscape scale, has not been tested with a comprehensive dataset. Moreover, both the effects of plant functional traits on the dispersal rate and variation in the functional-trait effects between invasive and native plants remain elusive. Compiling studies from 30 countries globally, we compared seed dispersal rates (km/year) on a local or landscape scale between 64 observations of invasive and 78 observations of native plants given effects of plant life forms, disturbance levels, and measurement methods. Furthermore, we compared the effects of functional traits on dispersal rate between invasive and native species. We found that: (1) Trait values were similar between the invasive and native plants except for the greater height of woody native plants than woody invasive ones; (2) Compared within the same plant life form, the faster dispersal rates of invasive species were found in herbaceous plants, not in woody plants, and disturbance level and measurement methods did not affect the rate comparison; (3) Plant height and seed length had significant effects on dispersal rates of both invasive and native plants, but the effect of leaf dry matter content (LDMC) was only significant on herbaceous invasive plants. The comparison of dispersal rate between invasive and native plants varied by plant life form. The convergent values but divergent dispersal effects of plant traits between invasive and native species suggest that the trait effects on invasiveness could be better understood by trait association with key factors in invasiveness, e.g., dispersal rate, than the direct trait comparison between invasive and native plants.
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Affiliation(s)
- Bo Zhang
- Department of Environmental Science and Policy, University of California, Davis, CA, USA
- Department of Integrative Biology, Oklahoma State University, Stillwater, OK, USA
| | - Alan Hastings
- Department of Environmental Science and Policy, University of California, Davis, CA, USA
- Santa Fe Institute, Santa Fe, NM, USA
| | - Edwin D Grosholz
- Department of Environmental Science and Policy, University of California, Davis, CA, USA
| | - Lu Zhai
- Department of Natural Resource Ecology and Management, Oklahoma State University, Stillwater, OK, USA.
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32
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Forzieri G, Dutrieux LP, Elia A, Eckhardt B, Caudullo G, Taboada FÁ, Andriolo A, Bălăcenoiu F, Bastos A, Buzatu A, Dorado FC, Dobrovolný L, Duduman ML, Fernandez-Carrillo A, Hernández-Clemente R, Hornero A, Ionuț S, Lombardero MJ, Junttila S, Lukeš P, Marianelli L, Mas H, Mlčoušek M, Mugnai F, Nețoiu C, Nikolov C, Olenici N, Olsson PO, Paoli F, Paraschiv M, Patočka Z, Pérez-Laorga E, Quero JL, Rüetschi M, Stroheker S, Nardi D, Ferenčík J, Battisti A, Hartmann H, Nistor C, Cescatti A, Beck PSA. The Database of European Forest Insect and Disease Disturbances: DEFID2. Glob Chang Biol 2023; 29:6040-6065. [PMID: 37605971 DOI: 10.1111/gcb.16912] [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] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 08/23/2023]
Abstract
Insect and disease outbreaks in forests are biotic disturbances that can profoundly alter ecosystem dynamics. In many parts of the world, these disturbance regimes are intensifying as the climate changes and shifts the distribution of species and biomes. As a result, key forest ecosystem services, such as carbon sequestration, regulation of water flows, wood production, protection of soils, and the conservation of biodiversity, could be increasingly compromised. Despite the relevance of these detrimental effects, there are currently no spatially detailed databases that record insect and disease disturbances on forests at the pan-European scale. Here, we present the new Database of European Forest Insect and Disease Disturbances (DEFID2). It comprises over 650,000 harmonized georeferenced records, mapped as polygons or points, of insects and disease disturbances that occurred between 1963 and 2021 in European forests. The records currently span eight different countries and were acquired through diverse methods (e.g., ground surveys, remote sensing techniques). The records in DEFID2 are described by a set of qualitative attributes, including severity and patterns of damage symptoms, agents, host tree species, climate-driven trigger factors, silvicultural practices, and eventual sanitary interventions. They are further complemented with a satellite-based quantitative characterization of the affected forest areas based on Landsat Normalized Burn Ratio time series, and damage metrics derived from them using the LandTrendr spectral-temporal segmentation algorithm (including onset, duration, magnitude, and rate of the disturbance), and possible interactions with windthrow and wildfire events. The DEFID2 database is a novel resource for many large-scale applications dealing with biotic disturbances. It offers a unique contribution to design networks of experiments, improve our understanding of ecological processes underlying biotic forest disturbances, monitor their dynamics, and enhance their representation in land-climate models. Further data sharing is encouraged to extend and improve the DEFID2 database continuously. The database is freely available at https://jeodpp.jrc.ec.europa.eu/ftp/jrc-opendata/FOREST/DISTURBANCES/DEFID2/.
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Affiliation(s)
- Giovanni Forzieri
- Department of Civil and Environmental Engineering, University of Florence, Florence, Italy
- European Commission, Joint Research Centre, Ispra, Italy
| | | | | | - Bernd Eckhardt
- European Commission, Joint Research Centre, Ispra, Italy
| | | | - Flor Álvarez Taboada
- DRACONES Research Group, Universidad de León, León, Spain
- Sustainable Forestry and Environmental Management Unit, University of Santiago de Compostela, Lugo, Spain
| | - Alessandro Andriolo
- Ufficio Pianificazione Forestale, Amministrazione Provincia Bolzano, Bolzano, Italy
| | - Flavius Bălăcenoiu
- National Institute for Research and Development in Forestry "Marin Drăcea" (INCDS), Voluntari, Romania
| | - Ana Bastos
- Department of Biogeochemical Processes, Max-Planck Institute for Biogeochemistry, Jena, Germany
| | - Andrei Buzatu
- National Institute for Research and Development in Forestry "Marin Drăcea" (INCDS), Craiova, Romania
| | - Fernando Castedo Dorado
- DRACONES Research Group, Universidad de León, León, Spain
- Sustainable Forestry and Environmental Management Unit, University of Santiago de Compostela, Lugo, Spain
| | - Lumír Dobrovolný
- University Forest Enterprise Masaryk Forest Křtiny, Mendel University in Brno, Brno, Czech Republic
| | - Mihai-Leonard Duduman
- Applied Ecology Laboratory, Forestry Faculty, "Ștefan cel Mare" University of Suceava, Suceava, Romania
| | | | | | - Alberto Hornero
- Instituto de Agricultura Sostenible (IAS), Consejo Superior de Investigaciones Científicas (CSIC), Córdoba, Spain
- Faculty of Engineering and Information Technology (FEIT), The University of Melbourne, Melbourne, Victoria, Australia
| | - Săvulescu Ionuț
- Department of Geomorphology-Pedology-Geomatics, Faculty of Geography, University of Bucharest, Bucharest, Romania
| | - María J Lombardero
- Sustainable Forestry and Environmental Management Unit, University of Santiago de Compostela, Lugo, Spain
| | - Samuli Junttila
- School of Forest Sciences, University of Eastern Finland, Joensuu, Finland
| | - Petr Lukeš
- Czechglobe-Global Change Research Institute, CAS, Brno, Czech Republic
- Ústav pro hospodářskou úpravu lesů-Forest Management Institute (FMI), Brno-Žabovřesky, Czech Republic
| | - Leonardo Marianelli
- CREA Research Centre for Plant Protection and Certification, Florence, Italy
| | - Hugo Mas
- Laboratori de Sanitat Forestal, Servei d'Ordenació i Gestió Forestal, Conselleria d'Agricultura, Desenvolupament Rural, Emergència Climàtica i Transició Ecològica, Generalitat Valenciana, Valencia, Spain
| | - Marek Mlčoušek
- Czechglobe-Global Change Research Institute, CAS, Brno, Czech Republic
- Ústav pro hospodářskou úpravu lesů-Forest Management Institute (FMI), Brno-Žabovřesky, Czech Republic
| | - Francesco Mugnai
- Department of Civil and Environmental Engineering, University of Florence, Florence, Italy
| | - Constantin Nețoiu
- National Institute for Research and Development in Forestry "Marin Drăcea" (INCDS), Craiova, Romania
| | - Christo Nikolov
- National Forest Centre, Forest Research Institute, Zvolen, Slovakia
| | - Nicolai Olenici
- National Institute for Research and Development in Forestry "Marin Drăcea" (INCDS), Voluntari, Romania
| | - Per-Ola Olsson
- Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
| | - Francesco Paoli
- CREA Research Centre for Plant Protection and Certification, Florence, Italy
| | - Marius Paraschiv
- National Institute for Research and Development in Forestry "Marin Drăcea" (INCDS), Brașov, Romania
| | - Zdeněk Patočka
- Department of Forest Management and Applied Geoinformatics, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic
| | - Eduardo Pérez-Laorga
- Laboratori de Sanitat Forestal, Servei d'Ordenació i Gestió Forestal, Conselleria d'Agricultura, Desenvolupament Rural, Emergència Climàtica i Transició Ecològica, Generalitat Valenciana, Valencia, Spain
| | - Jose Luis Quero
- Department of Forest Engineering, University of Córdoba, Córdoba, Spain
| | - Marius Rüetschi
- Department of Land Change Science, Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland
| | - Sophie Stroheker
- Swiss Forest Protection, Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland
| | - Davide Nardi
- DAFNAE-Entomology, University of Padova, Padova, Italy
| | - Ján Ferenčík
- Research Station Tatra National Park, Tatranská Lomnica, Slovakia
| | | | - Henrik Hartmann
- Department of Biogeochemical Processes, Max-Planck Institute for Biogeochemistry, Jena, Germany
- Insitute for Forest Protection, Julius Kühn-Institute, Federal Research Federal Research Center for Cultivated Plants, Quedlinburg, Germany
| | - Constantin Nistor
- Department of Geomorphology-Pedology-Geomatics, Faculty of Geography, University of Bucharest, Bucharest, Romania
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Fedorov N, Zhigunova S, Shirokikh P, Baisheva E, Martynenko V. Analysis of the Potential Range of Mountain Pine-Broadleaf Ecotone Forests and Its Changes under Moderate and Strong Climate Change in the 21st Century. Plants (Basel) 2023; 12:3698. [PMID: 37960054 PMCID: PMC10648261 DOI: 10.3390/plants12213698] [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] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/24/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023]
Abstract
Climatic changes have a significant impact on the composition and distribution of forests, especially on ecotone ones. In the Southern Ural, pine-broadleaf ecotone forests were widespread during the early Holocene time, but now have persisted as relic plant communities. This study aimed to analyze the current potential range and to model changes in habitat suitability of relic pine-broadleaf ecotone forests of the suballiance Tilio-Pinenion under scenarios of moderate (RCP4.5) and strong (RCP8.5) climate change. For modelling, we used MaxEnt software with the predictors being climate variables from CHELSA Bioclim, the global digital soil mapping system SoilGrids and the digital elevation model. In the Southern and Middle Urals, climate change is expected to increase the areas with suitable habitat conditions of these forests by the middle of the 21st century and decrease them in the second half of the century. By the middle of the 21st century, the eastern range boundary of these forests will shift eastward due to the penetration of broad-leaved tree species into coniferous forests of the Southern Ural. In the second half of the century, on the contrary, it is expected that climate aridization will again shift the potential range border of these forests to the west due to their gradual replacement by hemiboreal coniferous forests. The relationship between the floristic composition of pine-broadleaf forests and habitat suitability was identified. In low and medium habitat suitability, pine-broadleaf forests contain more nemoral species characteristic of deciduous forests of the temperate zone, and can be replaced by broadleaf forests after thinning and removal of pine. In the Volga Upland, suitable habitats are occupied by pine-broadleaf forests of the vicariant suballiance Querco robori-Tilienion cordatae. Projected climatic changes will have a significant impact on these ecotone forests, which remained completely unaltered for a long time.
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Affiliation(s)
- Nikolay Fedorov
- Ufa Institute of Biology, UFRC RAS, Ufa 450054, Russia; (S.Z.); (E.B.); (V.M.)
| | | | - Pavel Shirokikh
- Ufa Institute of Biology, UFRC RAS, Ufa 450054, Russia; (S.Z.); (E.B.); (V.M.)
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34
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Wrońska-Pilarek D, Rymszewicz S, Jagodziński AM, Gawryś R, Dyderski MK. Temperate forest understory vegetation shifts after 40 years of conservation. Sci Total Environ 2023; 895:165164. [PMID: 37379914 DOI: 10.1016/j.scitotenv.2023.165164] [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: 05/05/2023] [Revised: 06/20/2023] [Accepted: 06/25/2023] [Indexed: 06/30/2023]
Abstract
Understanding how vegetation composition and diversity respond to global changes is crucial for effective ecosystem management and conservation. This study evaluated shifts in understory vegetation after 40 years of conservation within Drawa National Park (NW Poland), to check which plant communities changed the most, and whether vegetation shifts reflect global change symptoms (climate change and pollution) or natural forest dynamics. Using ordination and generalized mixed-effects linear models, we assessed changes in alpha diversity metrics, accounting for taxonomic, functional, and phylogenetic aspects within 170 quasi-permanent plots, surveyed in 1973-85 and resurveyed in 2015-19. We found an overall homogenization of forest vegetation and specific shift patterns in certain forest associations. In coniferous and nutrient-poor broadleaved forests, the overall number of species increased due to the replacement of functionally distinct or specialized species with more ubiquitous species that could exploit increased resource availability. In riparian forests and alder carrs we found either shifts from riparian forest to alder carrs or to mesic broadleaved forests. The most stable communities were fertile broadleaved forests. Our study quantified shifts in taxonomic, functional, and phylogenetic diversity after 40 years of conservation and provides important insights into the shifts in vegetation composition in temperate forest communities. In coniferous and nutrient-poor broadleaved forests we found an increase in species richness and replacement of functionally distinct or specialized species by ubiquitous species, indicating increased resource availability. Shifts between wet broadleaved forests and transition into mesic forests suggest water limitation, which can be related to climate change. The most stable were fertile broadleaved forests fluctuating due to natural stand dynamics. The findings highlight the need for ongoing monitoring and management of ecological systems to preserve their diversity and functionality in the face of global changes.
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Affiliation(s)
- Dorota Wrońska-Pilarek
- Department of Botany and Forest Habitats, Poznań University of Life Sciences, Wojska Polskiego 71d, 60-625 Poznań, Poland
| | | | - Andrzej M Jagodziński
- Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, 62-035 Kórnik, Poland; Department of Game Management and Forest Protection, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 71D, 60-625 Poznań, Poland
| | - Radosław Gawryś
- Forest Research Institute (IBL), Sękocin Stary, Braci Leśnej Street No. 3, 05-090 Raszyn, Poland
| | - Marcin K Dyderski
- Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, 62-035 Kórnik, Poland.
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35
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Elliott GP. Windows of opportunity: a new tree-shrub dynamic at alpine treeline? Natl Sci Rev 2023; 10:nwad212. [PMID: 37719991 PMCID: PMC10503643 DOI: 10.1093/nsr/nwad212] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 09/19/2023] Open
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36
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Calders K, Brede B, Newnham G, Culvenor D, Armston J, Bartholomeus H, Griebel A, Hayward J, Junttila S, Lau A, Levick S, Morrone R, Origo N, Pfeifer M, Verbesselt J, Herold M. StrucNet: a global network for automated vegetation structure monitoring. Remote Sens Ecol Conserv 2023; 9:587-598. [PMID: 38505271 PMCID: PMC10946942 DOI: 10.1002/rse2.333] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 10/22/2022] [Revised: 03/01/2023] [Accepted: 03/27/2023] [Indexed: 03/21/2024]
Abstract
Climate change and increasing human activities are impacting ecosystems and their biodiversity. Quantitative measurements of essential biodiversity variables (EBV) and essential climate variables are used to monitor biodiversity and carbon dynamics and evaluate policy and management interventions. Ecosystem structure is at the core of EBVs and carbon stock estimation and can help to inform assessments of species and species diversity. Ecosystem structure is also used as an indirect indicator of habitat quality and expected species richness or species community composition. Spaceborne measurements can provide large-scale insight into monitoring the structural dynamics of ecosystems, but they generally lack consistent, robust, timely and detailed information regarding their full three-dimensional vegetation structure at local scales. Here we demonstrate the potential of high-frequency ground-based laser scanning to systematically monitor structural changes in vegetation. We present a proof-of-concept high-temporal ecosystem structure time series of 5 years in a temperate forest using terrestrial laser scanning (TLS). We also present data from automated high-temporal laser scanning that can allow upscaling of vegetation structure scanning, overcoming the limitations of a typically opportunistic TLS measurement approach. Automated monitoring will be a critical component to build a network of field monitoring sites that can provide the required calibration data for satellite missions to effectively monitor the structural dynamics of vegetation over large areas. Within this perspective, we reflect on how this network could be designed and discuss implementation pathways.
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Affiliation(s)
- Kim Calders
- CAVElab – Computational & Applied Vegetation Ecology, Department of EnvironmentGhent UniversityCoupure links 653Ghent9000Belgium
- School of Forest Sciences, University of Eastern FinlandJoensuu80101Finland
| | - Benjamin Brede
- Helmholtz Center Potsdam GFZ German Research Centre for GeosciencesSection 1.4 Remote Sensing and GeoinformaticsTelegrafenbergPotsdam14473Germany
| | | | - Darius Culvenor
- Environmental Sensing SystemsBentleigh EastVictoria3165Australia
| | - John Armston
- Department of Geographical SciencesUniversity of MarylandCollege ParkMarylandUSA
| | - Harm Bartholomeus
- Laboratory of Geo‐Information Science and Remote SensingWageningen UniversityWageningen6708 PBthe Netherlands
| | - Anne Griebel
- Hawkesbury Institute for the Environment, Western Sydney UniversityLocked Bag 1797PenrithNew South Wales2751Australia
| | - Jodie Hayward
- CSIRO564 Vanderlin DriveBerrimahNorthern Territory0828Australia
| | - Samuli Junttila
- School of Forest Sciences, University of Eastern FinlandJoensuu80101Finland
| | - Alvaro Lau
- Laboratory of Geo‐Information Science and Remote SensingWageningen UniversityWageningen6708 PBthe Netherlands
| | - Shaun Levick
- CSIRO564 Vanderlin DriveBerrimahNorthern Territory0828Australia
| | - Rosalinda Morrone
- Climate and Earth Observation GroupNational Physical LaboratoryHampton Road, TeddingtonLondonUK
| | - Niall Origo
- Climate and Earth Observation GroupNational Physical LaboratoryHampton Road, TeddingtonLondonUK
| | - Marion Pfeifer
- School of Natural and Environmental Sciences, Newcastle UniversityNewcastle Upon TyneNE1 7RUUK
| | - Jan Verbesselt
- Laboratory of Geo‐Information Science and Remote SensingWageningen UniversityWageningen6708 PBthe Netherlands
| | - Martin Herold
- Helmholtz Center Potsdam GFZ German Research Centre for GeosciencesSection 1.4 Remote Sensing and GeoinformaticsTelegrafenbergPotsdam14473Germany
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37
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Astigarraga J. Risk of tree species decline under aridification. Glob Chang Biol 2023; 29:5479-5481. [PMID: 37381116 DOI: 10.1111/gcb.16845] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 06/19/2023] [Indexed: 06/30/2023]
Abstract
The risk of decline due to climate change varies among different tree species, resulting in both winners and losers. However, quantifying the risk of species decline remains a challenging task, particularly due to regional variability in the rate of climate change. Additionally, the diverse evolutionary histories of species have resulted in a variety of distributions, forms, and functions, leading to diverse responses to climate. Cartereau et al. unravel these complexities by focusing on the vulnerability and exposure of species to global change, and quantify species' risk of decline due to aridification in warm drylands by the end of this century.
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Affiliation(s)
- Julen Astigarraga
- Universidad de Alcalá, Department of Life Sciences, Forest Ecology and Restoration Group (FORECO), Alcalá de Henares, Spain
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38
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Vilà-Cabrera A, Astigarraga J, Jump AS, Zavala MA, Seijo F, Sperlich D, Ruiz-Benito P. Anthropogenic land-use legacies underpin climate change-related risks to forest ecosystems. Trends Plant Sci 2023; 28:1132-1143. [PMID: 37263916 DOI: 10.1016/j.tplants.2023.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 04/13/2023] [Accepted: 04/26/2023] [Indexed: 06/03/2023]
Abstract
Forest ecosystems with long-lasting human imprints can emerge worldwide as outcomes of land-use cessation. However, the interaction of these anthropogenic legacies with climate change impacts on forests is not well understood. Here, we set out how anthropogenic land-use legacies that persist in forest properties, following alterations in forest distribution, structure, and composition, can interact with climate change stressors. We propose a risk-based framework to identify anthropogenic legacies of land uses in forest ecosystems and quantify the impact of their interaction with climate-related stress on forest responses. Considering anthropogenic land-use legacies alongside environmental drivers of forest ecosystem dynamics will improve our predictive capacity of climate-related risks to forests and our ability to promote ecosystem resilience to climate change.
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Affiliation(s)
- Albert Vilà-Cabrera
- CREAF, E08193 Bellaterra (Cerdanyola del Vallès), Catalonia, Spain; Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, UK; Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain.
| | - Julen Astigarraga
- Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain
| | - Alistair S Jump
- Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, UK
| | - Miguel A Zavala
- Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain
| | - Francisco Seijo
- Instituto de Empresa, School of Global and Public Affairs, Madrid, Spain
| | - Dominik Sperlich
- Department of Forestry Economics and Forest Planning, Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
| | - Paloma Ruiz-Benito
- Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain; Universidad de Alcalá, Grupo de Investigación en Teledetección Ambiental, Departamento de Geología, Geografía y Medio Ambiente, 28801 Alcalá de Henares, Madrid, Spain
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Au J, Bloom AA, Parazoo NC, Deans RM, Wong CYS, Houlton BZ, Magney TS. Forest productivity recovery or collapse? Model-data integration insights on drought-induced tipping points. Glob Chang Biol 2023; 29:5652-5665. [PMID: 37497614 DOI: 10.1111/gcb.16867] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 04/03/2023] [Indexed: 07/28/2023]
Abstract
More frequent and severe droughts are driving increased forest mortality around the globe. We urgently need to describe and predict how drought affects forest carbon cycling and identify thresholds of environmental stress that trigger ecosystem collapse. Quantifying the effects of drought at an ecosystem level is complex because dynamic climate-plant relationships can cause rapid and/or prolonged shifts in carbon balance. We employ the CARbon DAta MOdel fraMework (CARDAMOM) to investigate legacy effects of drought on forest carbon pools and fluxes. Our Bayesian model-data fusion approach uses tower observed meteorological forcing and carbon fluxes to determine the response and sensitivity of aboveground and belowground ecological processes associated with the 2012-2015 California drought. Our study area is a mid-montane mixed conifer forest in the Southern Sierras. CARDAMOM constrained with gross primary productivity (GPP) estimates covering 2011-2017 show a ~75% reduction in GPP, compared to negligible GPP change when constrained with 2011 only. Precipitation across 2012-2015 was 45% (474 mm) lower than the historical average and drove a cascading depletion in soil moisture and carbon pools (foliar, labile, roots, and litter). Adding 157 mm during an especially stressful year (2014, annual rainfall = 293 mm) led to a smaller depletion of water and carbon pools, steering the ecosystem away from a state of GPP tipping-point collapse to recovery. We present novel process-driven insights that demonstrate the sensitivity of GPP collapse to ecosystem foliar carbon and soil moisture states-showing that the full extent of GPP response takes several years to arise. Thus, long-term changes in soil moisture and carbon pools can provide a mechanistic link between drought and forest mortality. Our study provides an example for how key precipitation threshold ranges can influence forest productivity, making them useful for monitoring and predicting forest mortality events.
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Affiliation(s)
- J Au
- Department of Plant Sciences, University of California Davis, Davis, California, USA
| | - A A Bloom
- Jet Propulsion Laboratory California Institute of Technology, Pasadena, California, USA
| | - N C Parazoo
- Jet Propulsion Laboratory California Institute of Technology, Pasadena, California, USA
| | - R M Deans
- School of GeoSciences, University of Edinburgh, Edinburgh, UK
| | - C Y S Wong
- Department of Plant Sciences, University of California Davis, Davis, California, USA
| | - B Z Houlton
- Department of Ecology and Evolutionary Biology and Department of Global Development, Cornell University, Ithaca, New York, USA
| | - T S Magney
- Department of Plant Sciences, University of California Davis, Davis, California, USA
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40
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Johnson CE, Tafoya KA, Beck P, Concilio A, White KE, Quirós R, Wasserman MD. Primate richness and abundance is driven by both forest structure and conservation scenario in Costa Rica. PLoS One 2023; 18:e0290742. [PMID: 37703237 PMCID: PMC10499215 DOI: 10.1371/journal.pone.0290742] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 08/14/2023] [Indexed: 09/15/2023] Open
Abstract
Variation in tropical forest management directly affects biodiversity and provisioning of ecosystem services on a global scale, thus it is necessary to compare forests under different conservation approaches such as protected areas, payments for ecosystem services programs (PES), and ecotourism, as well as forests lacking any formal conservation plan. To examine the effectiveness of specific conservation approaches, we examined differences in forest structure and tree recruitment, including canopy cover; canopy height; seedling, sapling, and adult tree density; and average and total diameter at breast height (DBH) across 78 plots in 18 forests across Costa Rica representing protected areas, private forests utilizing PES and/or ecotourism, and private forests not utilizing these economic incentives. The effectiveness of conservation approaches in providing suitable primate habitat was assessed by conducting broad primate census surveys across a subset of eight forests to determine species richness and group encounter rate of three primate species: mantled howler monkey (Alouatta palliata), Central American spider monkey (Ateles geoffroyi), and the white-faced capuchin monkey (Cebus imitator). Only canopy height was significantly different across the three approaches, with protected areas conserving the tallest and likely oldest forests. Canopy height was also significantly associated with the group encounter rate for both mantled howler and spider monkeys, but not for capuchins. Total group encounter rate for all three monkey species combined was higher in incentivized forests than in protected areas, with capuchin and howler monkey group encounter rates driving the trend. Group encounter rate for spider monkeys was higher in protected areas than in incentivized forests. Incentivized conservation (PES and ecotourism) and protected areas are paragons of land management practices that can lead to variation in forest structure across a landscape, which not only protect primate communities, but support the dietary ecologies of sympatric primate species.
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Affiliation(s)
| | - Kathryn A. Tafoya
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN, United States of America
| | - Peter Beck
- Department of Environmental Science and Policy, St. Edward’s University, Austin, TX, United States of America
| | - Amy Concilio
- Department of Environmental Science and Policy, St. Edward’s University, Austin, TX, United States of America
| | - Kurt E. White
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, IN, United States of America
| | - Rodolfo Quirós
- Las Cruces Research Station, Organization for Tropical Studies, San Vito, Costa Rica
| | - Michael D. Wasserman
- Department of Anthropology, Indiana University, Bloomington, IN, United States of America
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41
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Liu Q, Peng C, Schneider R, Cyr D, Liu Z, Zhou X, Du M, Li P, Jiang Z, McDowell NG, Kneeshaw D. Vegetation browning: global drivers, impacts, and feedbacks. Trends Plant Sci 2023; 28:1014-1032. [PMID: 37087358 DOI: 10.1016/j.tplants.2023.03.024] [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: 05/22/2022] [Revised: 03/22/2023] [Accepted: 03/30/2023] [Indexed: 05/03/2023]
Abstract
As global climate conditions continue to change, disturbance regimes and environmental drivers will continue to shift, impacting global vegetation dynamics. Following a period of vegetation greening, there has been a progressive increase in remotely sensed vegetation browning globally. Given the many societal benefits that forests provide, it is critical that we understand vegetation dynamic alterations. Here, we review associative drivers, impacts, and feedbacks, revealing the complexity of browning. Concomitant increases in browning include the weakening of ecosystem services and functions and alterations to vegetation structure and species composition, as well as the development of potential positive climate change feedbacks. Also discussed are the current challenges in browning detection and understanding associated impacts and feedbacks. Finally, we outline recommended strategies.
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Affiliation(s)
- Qiuyu Liu
- Institute of Environment Sciences, Department of Biology Sciences, University of Quebec at Montreal, Case Postale 8888, Succ. Centre-Ville, Montreal, H3C 3P8, Canada; School of Public Policy and Administration, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Changhui Peng
- Institute of Environment Sciences, Department of Biology Sciences, University of Quebec at Montreal, Case Postale 8888, Succ. Centre-Ville, Montreal, H3C 3P8, Canada; College of Geographic Science, Hunan Normal University, Changsha, 410081, China.
| | - Robert Schneider
- University of Quebec at Rimouski (UQAR), Rimouski, Quebec, G5L 3A1, Canada
| | - Dominic Cyr
- Science and Technology Branch, Environment and Climate Change Canada, 351 St-Joseph Blvd, Gatineau, Quebec, Canada
| | - Zelin Liu
- College of Geographic Science, Hunan Normal University, Changsha, 410081, China
| | - Xiaolu Zhou
- College of Geographic Science, Hunan Normal University, Changsha, 410081, China
| | - Mingxi Du
- School of Public Policy and Administration, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Peng Li
- College of Geographic Science, Hunan Normal University, Changsha, 410081, China
| | - Zihan Jiang
- Institute of Environment Sciences, Department of Biology Sciences, University of Quebec at Montreal, Case Postale 8888, Succ. Centre-Ville, Montreal, H3C 3P8, Canada; CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Nate G McDowell
- Atmospheric Sciences and Global Change Division, Pacific Northwest National Lab, PO Box 999, Richland, WA 99352, USA; School of Biological Sciences, Washington State University, PO Box 644236, Pullman, WA 99164-4236, USA
| | - Daniel Kneeshaw
- Institute of Environment Sciences, Department of Biology Sciences, University of Quebec at Montreal, Case Postale 8888, Succ. Centre-Ville, Montreal, H3C 3P8, Canada; Centre for Forest Research, University of Quebec at Montreal, Case Postale 8888, Succ. Centre-Ville, Montreal, H3C 3P8, Canada
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42
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Clark CM, Phelan J, Ash J, Buckley J, Cajka J, Horn K, Thomas RQ, Sabo RD. Future climate change effects on US forest composition may offset benefits of reduced atmospheric deposition of N and S. Glob Chang Biol 2023; 29:4793-4810. [PMID: 37417247 DOI: 10.1111/gcb.16817] [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: 12/09/2022] [Accepted: 04/26/2023] [Indexed: 07/08/2023]
Abstract
Climate change and atmospheric deposition of nitrogen (N) and sulfur (S) are important drivers of forest demography. Here we apply previously derived growth and survival responses for 94 tree species, representing >90% of the contiguous US forest basal area, to project how changes in mean annual temperature, precipitation, and N and S deposition from 20 different future scenarios may affect forest composition to 2100. We find that under the low climate change scenario (RCP 4.5), reductions in aboveground tree biomass from higher temperatures are roughly offset by increases in aboveground tree biomass from reductions in N and S deposition. However, under the higher climate change scenario (RCP 8.5) the decreases from climate change overwhelm increases from reductions in N and S deposition. These broad trends underlie wide variation among species. We found averaged across temperature scenarios the relative abundance of 60 species were projected to decrease more than 5% and 20 species were projected to increase more than 5%; and reductions of N and S deposition led to a decrease for 13 species and an increase for 40 species. This suggests large shifts in the composition of US forests in the future. Negative climate effects were mostly from elevated temperature and were not offset by scenarios with wetter conditions. We found that by 2100 an estimated 1 billion trees under the RCP 4.5 scenario and 20 billion trees under the RCP 8.5 scenario may be pushed outside the temperature record upon which these relationships were derived. These results may not fully capture future changes in forest composition as several other factors were not included. Overall efforts to reduce atmospheric deposition of N and S will likely be insufficient to overcome climate change impacts on forest demography across much of the United States unless we adhere to the low climate change scenario.
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Affiliation(s)
- Christopher M Clark
- Center for Public Health and Environmental Assessment, Office of Research and Development, US Environmental Protection Agency, Washington, DC, USA
| | - Jennifer Phelan
- RTI International, Research Triangle Park, North Carolina, USA
| | - Jeremy Ash
- US Department of Agriculture, US Forest Service, Ashville, North Carolina, USA
| | - John Buckley
- RTI International, Research Triangle Park, North Carolina, USA
| | - James Cajka
- RTI International, Research Triangle Park, North Carolina, USA
| | - Kevin Horn
- Department of Forest Resources and Environmental Conservation, Virginia Polytechnical University, Blacksburg, Virginia, USA
| | - R Quinn Thomas
- Department of Forest Resources and Environmental Conservation, Virginia Polytechnical University, Blacksburg, Virginia, USA
| | - Robert D Sabo
- Center for Public Health and Environmental Assessment, Office of Research and Development, US Environmental Protection Agency, Washington, DC, USA
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43
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Cabon A, DeRose RJ, Shaw JD, Anderegg WRL. Declining tree growth resilience mediates subsequent forest mortality in the US Mountain West. Glob Chang Biol 2023; 29:4826-4841. [PMID: 37344959 DOI: 10.1111/gcb.16826] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/17/2023] [Accepted: 05/23/2023] [Indexed: 06/23/2023]
Abstract
Climate change-triggered forest die-off is an increasing threat to global forests and carbon sequestration but remains extremely challenging to predict. Tree growth resilience metrics have been proposed as measurable proxies of tree susceptibility to mortality. However, it remains unclear whether tree growth resilience can improve predictions of stand-level mortality. Here, we use an extensive tree-ring dataset collected at ~3000 permanent forest inventory plots, spanning 13 dominant species across the US Mountain West, where forests have experienced strong drought and extensive die-off has been observed in the past two decades, to test the hypothesis that tree growth resilience to drought can explain and improve predictions of observed stand-level mortality. We found substantial increases in growth variability and temporal autocorrelation as well declining drought resistance and resilience for a number of species over the second half of the 20th century. Declining resilience and low tree growth were strongly associated with cross- and within-species patterns of mortality. Resilience metrics had similar explicative power compared to climate and stand structure, but the covariance structure among predictors implied that the effect of tree resilience on mortality could partially be explained by stand and climate variables. We conclude that tree growth resilience offers highly valuable insights on tree physiology by integrating the effect of stressors on forest mortality but may have only moderate potential to improve large-scale projections of forest die-off under climate change.
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Affiliation(s)
- Antoine Cabon
- Wilkes Center for Climate Science and Policy, University of Utah, Salt Lake City, Utah, USA
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, USA
| | - R Justin DeRose
- Department of Wildland Resources and Ecology Center, Utah State University, Logan, Utah, USA
| | - John D Shaw
- USDA Forest Service, Rocky Mountain Research Station, Logan, Utah, USA
| | - William R L Anderegg
- Wilkes Center for Climate Science and Policy, University of Utah, Salt Lake City, Utah, USA
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, USA
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44
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Grubinger S, Coops NC, O'Neill GA. Picturing local adaptation: Spectral and structural traits from drone remote sensing reveal clinal responses to climate transfer in common-garden trials of interior spruce (Picea engelmannii × glauca). Glob Chang Biol 2023; 29:4842-4860. [PMID: 37424219 DOI: 10.1111/gcb.16855] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 06/01/2023] [Accepted: 06/13/2023] [Indexed: 07/11/2023]
Abstract
Common-garden trials of forest trees provide phenotype data used to assess growth and local adaptation; this information is foundational to tree breeding programs, genecology, and gene conservation. As jurisdictions consider assisted migration strategies to match populations to suitable climates, in situ progeny and provenance trials provide experimental evidence of adaptive responses to climate change. We used drone technology, multispectral imaging, and digital aerial photogrammetry to quantify spectral traits related to stress, photosynthesis, and carotenoids, and structural traits describing crown height, size, and complexity at six climatically disparate common-garden trials of interior spruce (Picea engelmannii × glauca) in western Canada. Through principal component analysis, we identified key components of climate related to temperature, moisture, and elevational gradients. Phenotypic clines in remotely sensed traits were analyzed as trait correlations with provenance climate transfer distances along principal components (PCs). We used traits showing clinal variation to model best linear unbiased predictions for tree height (R2 = .98-.99, root mean square error [RMSE] = 0.06-0.10 m) and diameter at breast height (DBH, R2 = .71-.97, RMSE = 2.57-3.80 mm) and generated multivariate climate transfer functions with the model predictions. Significant (p < .05) clines were present for spectral traits at all sites along all PCs. Spectral traits showed stronger clinal variation than structural traits along temperature and elevational gradients and along moisture gradients at wet, coastal sites, but not at dry, interior sites. Spectral traits may capture patterns of local adaptation to temperature and montane growing seasons which are distinct from moisture-limited patterns in stem growth. This work demonstrates that multispectral indices improve the assessment of local adaptation and that spectral and structural traits from drone remote sensing produce reliable proxies for ground-measured height and DBH. This phenotyping framework contributes to the analysis of common-garden trials towards a mechanistic understanding of local adaptation to climate.
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Affiliation(s)
- Samuel Grubinger
- Faculty of Forestry, Integrated Remote Sensing Studio, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nicholas C Coops
- Faculty of Forestry, Integrated Remote Sensing Studio, University of British Columbia, Vancouver, British Columbia, Canada
| | - Gregory A O'Neill
- BC Ministry of Forests, Kalamalka Forestry Centre, Vernon, British Columbia, Canada
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Kapoor B, Onufrak A, Klingeman III W, DeBruyn JM, Cregger MA, Willcox E, Trigiano R, Hadziabdic D. Signatures of prescribed fire in the microbial communities of Cornus florida are largely undetectable five months post-fire. PeerJ 2023; 11:e15822. [PMID: 37641599 PMCID: PMC10460572 DOI: 10.7717/peerj.15822] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 07/10/2023] [Indexed: 08/31/2023] Open
Abstract
Prescribed burn is a management tool that influences the physical structure and composition of forest plant communities and their associated microorganisms. Plant-associated microorganisms aid in host plant disease tolerance and increase nutrient availability. The effects of prescribed burn on microorganisms associated with native ecologically and economically important tree species, such as Cornus florida L. (flowering dogwood), are not well understood, particularly in aboveground plant tissues (e.g., leaf, stem, and bark tissues). The objective of this study was to use 16S rRNA gene and ITS2 region sequencing to evaluate changes in bacterial and fungal communities of five different flowering dogwood-associated niches (soil, roots, bark, stem, and leaves) five months following a prescribed burn treatment. The alpha- and beta-diversity of root bacterial/archaeal communities differed significantly between prescribed burn and unburned control-treated trees. In these bacterial/archaeal root communities, we also detected a significantly higher relative abundance of sequences identified as Acidothermaceae, a family of thermophilic bacteria. No significant differences were detected between prescribed burn-treated and unburned control trees in bulk soils or bark, stem, or leaf tissues. The findings of our study suggest that prescribed burn does not significantly alter the aboveground plant-associated microbial communities of flowering dogwood trees five months following the prescribed burn application. Further studies are required to better understand the short- and long-term effects of prescribed burns on the microbial communities of forest trees.
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Affiliation(s)
- Beant Kapoor
- Department of Entomology and Plant Pathology, University of Tennessee-Knoxville, Knoxville, Tennessee, United States
| | - Aaron Onufrak
- Department of Entomology and Plant Pathology, University of Tennessee-Knoxville, Knoxville, Tennessee, United States
| | - William Klingeman III
- Department of Plant Sciences, University of Tennessee-Knoxville, Knoxville, Tennessee, United States
| | - Jennifer M. DeBruyn
- Department of Biosystems Engineering and Soil Science, University of Tennessee-Knoxville, Knoxville, Tennessee, United States
| | - Melissa A. Cregger
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States
| | - Emma Willcox
- Department of Forestry, Wildlife and Fisheries, University of Tennessee-Knoxville, Knoxville, Tennessee, United States
| | - Robert Trigiano
- Department of Entomology and Plant Pathology, University of Tennessee-Knoxville, Knoxville, Tennessee, United States
| | - Denita Hadziabdic
- Department of Entomology and Plant Pathology, University of Tennessee-Knoxville, Knoxville, Tennessee, United States
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46
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Brantley EM, Jones AG, Hodson AM, Brown JW, Pogue MG, Suazo MM, Parmenter RR. Short-term effects of a high-severity summer wildfire on conifer forest moth (Lepidoptera) communities in New Mexico, USA. Environ Entomol 2023; 52:606-617. [PMID: 37452672 DOI: 10.1093/ee/nvad068] [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: 01/07/2023] [Revised: 06/04/2023] [Accepted: 06/29/2023] [Indexed: 07/18/2023]
Abstract
Forest fires in North America are becoming larger in area and burning with higher severity as a result of climate change and land management practices. High-severity, stand-replacement fires can inflict major changes to forest insect communities, potentially extirpating many species through altered post-fire habitat resources. We assessed forest-dwelling macrolepidopteran moth communities in mixed conifer and ponderosa pine forests during the first year after the 2011 Las Conchas fire in New Mexico, USA. We deployed blacklight traps in replicated burned and unburned stands during June, July, and August in 2012. We collected 9,478 individuals, representing 211 species and 8 families. Noctuidae (124 species) and Geometridae (53) comprised the majority of the taxa, followed by Erebidae (21), Sphingidae (5), Notodontidae (3), Lasiocampidae (2), Saturniidae (2), and Drepanidae (1). Moth communities (species composition and abundances) in each forest type (mixed conifer vs. ponderosa pine) were statistically distinguishable, but shared 56.4% (119) of observed species. Overall, compared to unburned forests, post-fire moth communities in both forest types had significantly lower numbers of individuals, species richness and diversity, and lower evenness in ponderosa pine forests. As expected, categorizing moth taxa by larval host plant taxa revealed that reductions of moth populations following fire were associated with the elimination or reduction of available larval host plants (particularly conifers, oaks, and junipers). We predict that future moth community succession will likely parallel the overall transformation from a forested landscape to a montane meadow/grassland ecosystem, with continued reduction in tree-feeding species and increasing dominance by forb/grass-feeding species.
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Affiliation(s)
- Eileen M Brantley
- Valles Caldera National Preserve, National Park Service, Jemez Springs, NM 87025, USA
- Department of Environmental Studies, University of the South, Sewanee, TN 37383, USA
| | - Arden G Jones
- Valles Caldera National Preserve, National Park Service, Jemez Springs, NM 87025, USA
- Department of Environmental Studies, University of the South, Sewanee, TN 37383, USA
| | - Alicia M Hodson
- Valles Caldera National Preserve, National Park Service, Jemez Springs, NM 87025, USA
- U.S. National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - John W Brown
- U.S. National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - Michael G Pogue
- Systematic Entomology Laboratory, USDA/ARS, Smithsonian Institution, Washington, DC 20560, USA
| | - Martina M Suazo
- Valles Caldera National Preserve, National Park Service, Jemez Springs, NM 87025, USA
| | - Robert R Parmenter
- Valles Caldera National Preserve, National Park Service, Jemez Springs, NM 87025, USA
- Museum of Southwestern Biology, Division of Arthropods, Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA
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47
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Li F, Xiao J, Chen J, Ballantyne A, Jin K, Li B, Abraha M, John R. Global water use efficiency saturation due to increased vapor pressure deficit. Science 2023; 381:672-677. [PMID: 37561856 DOI: 10.1126/science.adf5041] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 07/06/2023] [Indexed: 08/12/2023]
Abstract
The ratio of carbon assimilation to water evapotranspiration (ET) of an ecosystem, referred to as ecosystem water use efficiency (WUEeco), is widely expected to increase because of the rising atmospheric carbon dioxide concentration (Ca). However, little is known about the interactive effects of rising Ca and climate change on WUEeco. On the basis of upscaled estimates from machine learning methods and global FLUXNET observations, we show that global WUEeco has not risen since 2001 because of the asymmetric effects of an increased vapor pressure deficit (VPD), which depressed photosynthesis and enhanced ET. An undiminished ET trend indicates that rising temperature and VPD may play a more important role in regulating ET than declining stomatal conductance. Projected increases in VPD are predicted to affect the future coupling of the terrestrial carbon and water cycles.
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Affiliation(s)
- Fei Li
- Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, China
- Center for Global Change and Earth Observations, Michigan State University, East Lansing, MI 48823, USA
| | - Jingfeng Xiao
- Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, USA
| | - Jiquan Chen
- Center for Global Change and Earth Observations, Michigan State University, East Lansing, MI 48823, USA
| | - Ashley Ballantyne
- Department of Ecosystem and Conservation Science, University of Montana, Missoula, MT 59801, USA
- Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, 91190 Gif-sur-Yvette, France
| | - Ke Jin
- Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, China
| | - Bing Li
- Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, China
| | - Michael Abraha
- Center for Global Change and Earth Observations, Michigan State University, East Lansing, MI 48823, USA
| | - Ranjeet John
- Department of Biology and Department of Sustainability, University of South Dakota, Vermillion, SD 57069, USA
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Méndez-Cea B, García-García I, Linares JC, Gallego FJ. Warming appears as the main risk of non-adaptedness for western Mediterranean relict fir forests under expected climate change scenarios. Front Plant Sci 2023; 14:1155441. [PMID: 37636100 PMCID: PMC10451094 DOI: 10.3389/fpls.2023.1155441] [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: 01/31/2023] [Accepted: 07/19/2023] [Indexed: 08/29/2023]
Abstract
Circum-Mediterranean firs are considered among the most drought-sensitive species to climate change. Understanding the genetic basis of trees' adaptive capacity and intra-specific variability to drought avoidance is mandatory to define conservation measures, thus potentially preventing their extinction. We focus here on Abies pinsapo and Abies marocana, both relict tree species, endemic from south Spain and north Morocco, respectively. A total of 607 samples were collected from eight nuclei: six from Spanish fir and two from Moroccan fir. A genotyping by sequencing technique called double digestion restriction site-associated DNA sequencing (ddRAD-seq) was performed to obtain a genetic matrix based on single-nucleotide polymorphisms (SNPs). This matrix was utilized to study the genetic structure of A. pinsapo populations and to carry out selection signature studies. In order to understand how Spanish fir and Moroccan fir cope with climate change, genotype-environment associations (GEAs) were identified. Further, the vulnerability of these species to climate variations was estimated by the risk of non-adaptedness (RONA). The filtering of the de novo assembly of A. pinsapo provided 3,982 SNPs from 504 out of 509 trees sequenced. Principal component analysis (PCA) genetically separated Grazalema from the rest of the Spanish populations. However, FST values showed significant differences among the sampling points. We found 51 loci potentially under selection. Homolog sequences were found for some proteins related to abiotic stress response, such as dehydration-responsive element binding transcription factor, regulation of abscisic acid signaling, and methylation pathway. A total of 15 associations with 11 different loci were observed in the GEA studies, with the maximum temperature of the warmest month being the variable with the highest number of associated loci. This temperature sensitivity was also supported by the risk of non-adaptedness, which yielded a higher risk for both A. pinsapo and A. marocana under the high emission scenario (Representative Concentration Pathway (RCP) 8.5). This study sheds light on the response to climate change of these two endemic species.
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Affiliation(s)
- Belén Méndez-Cea
- Dpto. Genética, Fisiología y Microbiología, Unidad Docente de Genética, Facultad de CC Biológicas, Universidad Complutense de Madrid, Madrid, Spain
| | - Isabel García-García
- Dpto. Genética, Fisiología y Microbiología, Unidad Docente de Genética, Facultad de CC Biológicas, Universidad Complutense de Madrid, Madrid, Spain
| | - Juan Carlos Linares
- Dpto. Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Sevilla, Spain
| | - Francisco Javier Gallego
- Dpto. Genética, Fisiología y Microbiología, Unidad Docente de Genética, Facultad de CC Biológicas, Universidad Complutense de Madrid, Madrid, Spain
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Jung CG, Keyser AR, Remy CC, Krofcheck D, Allen CD, Hurteau MD. Topographic information improves simulated patterns of post-fire conifer regeneration in the southwest United States. Glob Chang Biol 2023; 29:4342-4353. [PMID: 37211629 DOI: 10.1111/gcb.16764] [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: 01/15/2023] [Revised: 04/19/2023] [Accepted: 05/07/2023] [Indexed: 05/23/2023]
Abstract
The western United States is projected to experience more frequent and severe wildfires in the future due to drier and hotter climate conditions, exacerbating destructive wildfire impacts on forest ecosystems such as tree mortality and unsuccessful post-fire regeneration. While empirical studies have revealed strong relationships between topographical information and plant regeneration, ecological processes in ecosystem models have either not fully addressed topography-mediated effects on the probability of plant regeneration, or the probability is only controlled by climate-related factors, for example, water and light stresses. In this study, we incorporated seedling survival data based on a planting experiment in the footprint of the 2011 Las Conchas Fire into the Photosynthesis and EvapoTranspiration (PnET) extension of the LANDIS-II model by adding topographic and an additional climatic variable to the probability of regeneration. The modified algorithm included topographic parameters such as heat load index and ground slope and spring precipitation. We ran simulations on the Las Conchas Fire landscape for 2012-2099 using observed and projected climate data (i.e., Representative Concentration Pathway 4.5 and 8.5). Our modification significantly reduced the number of regeneration events of three common southwestern conifer tree species (piñon, ponderosa pine, and Douglas-fir), leading to decreases in aboveground biomass, regardless of climate scenario. The modified algorithm decreased regeneration at higher elevations and increased regeneration at lower elevations relative to the original algorithm. Regenerations of three species also decreased in eastern aspects. Our findings suggest that ecosystem models may overestimate post-fire regeneration events in the southwest United States. To better represent regeneration processes following wildfire, ecosystem models need refinement to better account for the range of factors that influence tree seedling establishment. This will improve model utility for projecting the combined effects of climate and wildfire on tree species distributions.
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Affiliation(s)
- Chang Gyo Jung
- Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Alisa R Keyser
- Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA
- Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, Colorado, USA
| | - Cecile C Remy
- Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA
- Institute of Geography, Augsburg University, Augsburg, Germany
| | - Daniel Krofcheck
- Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Craig D Allen
- Department of Geography and Environmental Studies, University of New Mexico, Albuquerque, New Mexico, USA
| | - Matthew D Hurteau
- Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA
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Liu H, Zhang L, Ma Q, Zhao W, Chen Y. From tree to forest: Multiple carbon sink constraints. Innovation (N Y) 2023; 4:100463. [PMID: 37448740 PMCID: PMC10336248 DOI: 10.1016/j.xinn.2023.100463] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 06/18/2023] [Indexed: 07/15/2023] Open
Affiliation(s)
- Hui Liu
- Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- South China National Botanical Garden, Guangzhou 510650, China
| | - Lin Zhang
- State Key Laboratory of Tibetan Plateau Earth System, Environment, and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Qin Ma
- School of Geography, Nanjing Normal University, Nanjing 210023, China
| | - Wei Zhao
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Yiping Chen
- School of Geospatial Engineering and Science, Sun Yat-Sen University, Zhuhai 519082, China
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