1
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Wong MY, Wurzburger N, Hall JS, Wright SJ, Tang W, Hedin LO, Saltonstall K, van Breugel M, Batterman SA. Trees adjust nutrient acquisition strategies across tropical forest secondary succession. New Phytol 2024. [PMID: 38742309 DOI: 10.1111/nph.19812] [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: 12/21/2023] [Accepted: 04/23/2024] [Indexed: 05/16/2024]
Abstract
Nutrient limitation may constrain the ability of recovering and mature tropical forests to serve as a carbon sink. However, it is unclear to what extent trees can utilize nutrient acquisition strategies - especially root phosphatase enzymes and mycorrhizal symbioses - to overcome low nutrient availability across secondary succession. Using a large-scale, full factorial nitrogen and phosphorus fertilization experiment of 76 plots along a secondary successional gradient in lowland wet tropical forests of Panama, we tested the extent to which root phosphatase enzyme activity and mycorrhizal colonization are flexible, and if investment shifts over succession, reflective of changing nutrient limitation. We also conducted a meta-analysis to test how tropical trees adjust these strategies in response to nutrient additions and across succession. We find that tropical trees are dynamic, adjusting investment in strategies - particularly root phosphatase - in response to changing nutrient conditions through succession. These changes reflect a shift from strong nitrogen to weak phosphorus limitation over succession. Our meta-analysis findings were consistent with our field study; we found more predictable responses of root phosphatase than mycorrhizal colonization to nutrient availability. Our findings suggest that nutrient acquisition strategies respond to nutrient availability and demand in tropical forests, likely critical for alleviating nutrient limitation.
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Affiliation(s)
- Michelle Y Wong
- Cary Institute of Ecosystem Studies, Millbrook, NY, 12545, USA
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, 06520, USA
| | - Nina Wurzburger
- Odum School of Ecology, University of Georgia, Athens, GA, 30602, USA
| | - Jefferson S Hall
- ForestGEO, Smithsonian Tropical Research Institute, Ancón, 0843-03092, Panama, Panama
| | - S Joseph Wright
- Smithsonian Tropical Research Institute, Apartado, 0843-03092, Balboa, Panama
| | - Wenguang Tang
- School of Geography and Priestley International Centre for Climate, University of Leeds, Leeds, LS2, UK
| | - Lars O Hedin
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, 08544, USA
| | - Kristin Saltonstall
- Smithsonian Tropical Research Institute, Apartado, 0843-03092, Balboa, Panama
| | - Michiel van Breugel
- ForestGEO, Smithsonian Tropical Research Institute, Ancón, 0843-03092, Panama, Panama
- Department of Geography, National University of Singapore, Singapore, 119077, Singapore
- Yale-NUS College, Singapore, 138527, Singapore
| | - Sarah A Batterman
- Cary Institute of Ecosystem Studies, Millbrook, NY, 12545, USA
- Smithsonian Tropical Research Institute, Apartado, 0843-03092, Balboa, Panama
- School of Geography and Priestley International Centre for Climate, University of Leeds, Leeds, LS2, UK
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2
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Cusack DF, Christoffersen B, Smith-Martin CM, Andersen KM, Cordeiro AL, Fleischer K, Wright SJ, Guerrero-Ramírez NR, Lugli LF, McCulloch LA, Sanchez-Julia M, Batterman SA, Dallstream C, Fortunel C, Toro L, Fuchslueger L, Wong MY, Yaffar D, Fisher JB, Arnaud M, Dietterich LH, Addo-Danso SD, Valverde-Barrantes OJ, Weemstra M, Ng JC, Norby RJ. Toward a coordinated understanding of hydro-biogeochemical root functions in tropical forests for application in vegetation models. New Phytol 2024; 242:351-371. [PMID: 38416367 DOI: 10.1111/nph.19561] [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: 05/18/2023] [Accepted: 01/10/2024] [Indexed: 02/29/2024]
Abstract
Tropical forest root characteristics and resource acquisition strategies are underrepresented in vegetation and global models, hampering the prediction of forest-climate feedbacks for these carbon-rich ecosystems. Lowland tropical forests often have globally unique combinations of high taxonomic and functional biodiversity, rainfall seasonality, and strongly weathered infertile soils, giving rise to distinct patterns in root traits and functions compared with higher latitude ecosystems. We provide a roadmap for integrating recent advances in our understanding of tropical forest belowground function into vegetation models, focusing on water and nutrient acquisition. We offer comparisons of recent advances in empirical and model understanding of root characteristics that represent important functional processes in tropical forests. We focus on: (1) fine-root strategies for soil resource exploration, (2) coupling and trade-offs in fine-root water vs nutrient acquisition, and (3) aboveground-belowground linkages in plant resource acquisition and use. We suggest avenues for representing these extremely diverse plant communities in computationally manageable and ecologically meaningful groups in models for linked aboveground-belowground hydro-nutrient functions. Tropical forests are undergoing warming, shifting rainfall regimes, and exacerbation of soil nutrient scarcity caused by elevated atmospheric CO2. The accurate model representation of tropical forest functions is crucial for understanding the interactions of this biome with the climate.
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Affiliation(s)
- Daniela F Cusack
- Department of Ecosystem Science and Sustainability, Warner College of Natural Resources, Colorado State University, 1231 Libbie Coy Way, A104, Fort Collins, CO, 80523-1476, USA
- Smithsonian Tropical Research Institute, Apartado, Balboa, 0843-03092, Panama
| | - Bradley Christoffersen
- School of Integrative Biological and Chemical Sciences, The University of Texas Rio Grande Valley, Edinburg, TX, 78539, USA
| | - Chris M Smith-Martin
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN, 55108, USA
| | | | - Amanda L Cordeiro
- Department of Ecosystem Science and Sustainability, Warner College of Natural Resources, Colorado State University, 1231 Libbie Coy Way, A104, Fort Collins, CO, 80523-1476, USA
- Smithsonian Tropical Research Institute, Apartado, Balboa, 0843-03092, Panama
| | - Katrin Fleischer
- Department Biogeochemical Signals, Max-Planck-Institute for Biogeochemistry, Hans-Knöll-Straße 10, Jena, 07745, Germany
| | - S Joseph Wright
- Smithsonian Tropical Research Institute, Apartado, Balboa, 0843-03092, Panama
| | - Nathaly R Guerrero-Ramírez
- Silviculture and Forest Ecology of Temperate Zones, Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Gottingen, 37077, Germany
- Centre of Biodiversity and Sustainable Land Use (CBL), University of Göttingen, Gottingen, 37077, Germany
| | - Laynara F Lugli
- School of Life Sciences, Technical University of Munich, Freising, 85354, Germany
| | - Lindsay A McCulloch
- Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford St., Cambridge, MA, 02138, USA
- National Center for Atmospheric Research, National Oceanographic and Atmospheric Agency, 1850 Table Mesa Dr., Boulder, CO, 80305, USA
| | - Mareli Sanchez-Julia
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA, 70118, USA
| | - Sarah A Batterman
- Smithsonian Tropical Research Institute, Apartado, Balboa, 0843-03092, Panama
- Cary Institute of Ecosystem Studies, Millbrook, NY, 12545, USA
- School of Geography, University of Leeds, Leeds, LS2 9JT, UK
| | - Caroline Dallstream
- Department of Biology, McGill University, 1205 Av. du Docteur-Penfield, Montreal, QC, H3A 1B1, Canada
| | - Claire Fortunel
- AMAP (Botanique et Modélisation de l'Architecture des Plantes et des Végétations), Université de Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier, 34398, France
| | - Laura Toro
- Yale Applied Science Synthesis Program, The Forest School at the Yale School of the Environment, Yale University, New Haven, CT, 06511, USA
| | - Lucia Fuchslueger
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, 1030, Austria
| | - Michelle Y Wong
- Cary Institute of Ecosystem Studies, Millbrook, NY, 12545, USA
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, 06511, USA
| | - Daniela Yaffar
- Functional Forest Ecology, Universität Hamburg, Barsbüttel, 22885, Germany
| | - Joshua B Fisher
- Schmid College of Science and Technology, Chapman University, 1 University Drive, Orange, CA, 92866, USA
| | - Marie Arnaud
- Institute of Ecology and Environmental Sciences (IEES), UMR 7618, CNRS-Sorbonne University-INRAE-UPEC-IRD, Paris, 75005, France
- School of Geography, Earth and Environmental Sciences & BIFOR, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Lee H Dietterich
- Department of Ecosystem Science and Sustainability, Warner College of Natural Resources, Colorado State University, 1231 Libbie Coy Way, A104, Fort Collins, CO, 80523-1476, USA
- U.S. Army Engineer Research and Development Center, Environmental Laboratory, Vicksburg, MS, 39180, USA
- Department of Biology, Haverford College, Haverford, PA, 19003, USA
| | - Shalom D Addo-Danso
- Forests and Climate Change Division, CSIR-Forestry Research Institute of Ghana, P.O Box UP 63 KNUST, Kumasi, Ghana
| | - Oscar J Valverde-Barrantes
- Department of Biological Sciences, International Center for Tropical Biodiversity, Florida International University, Miami, FL, 33199, USA
| | - Monique Weemstra
- Department of Biological Sciences, International Center for Tropical Biodiversity, Florida International University, Miami, FL, 33199, USA
| | - Jing Cheng Ng
- Nanyang Technological University, Singapore, 639798, Singapore
| | - Richard J Norby
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, 37996, USA
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3
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Gurung K, Field KJ, Batterman SA, Poulton SW, Mills BJW. Geographic range of plants drives long-term climate change. Nat Commun 2024; 15:1805. [PMID: 38418475 PMCID: PMC10901853 DOI: 10.1038/s41467-024-46105-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 02/14/2024] [Indexed: 03/01/2024] Open
Abstract
Long computation times in vegetation and climate models hamper our ability to evaluate the potentially powerful role of plants on weathering and carbon sequestration over the Phanerozoic Eon. Simulated vegetation over deep time is often homogenous, and disregards the spatial distribution of plants and the impact of local climatic variables on plant function. Here we couple a fast vegetation model (FLORA) to a spatially-resolved long-term climate-biogeochemical model (SCION), to assess links between plant geographical range, the long-term carbon cycle and climate. Model results show lower rates of carbon fixation and up to double the previously predicted atmospheric CO2 concentration due to a limited plant geographical range over the arid Pangea supercontinent. The Mesozoic dispersion of the continents increases modelled plant geographical range from 65% to > 90%, amplifying global CO2 removal, consistent with geological data. We demonstrate that plant geographical range likely exerted a major, under-explored control on long-term climate change.
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Affiliation(s)
- Khushboo Gurung
- School of Earth and Environment, University of Leeds, Leeds, UK.
| | - Katie J Field
- Plants, Photosynthesis and Soil, School of Biosciences, University of Sheffield, Sheffield, UK
| | - Sarah A Batterman
- Cary Institute of Ecosystem Studies, Millbrook, NY, USA
- School of Geography, University of Leeds, Leeds, UK
- Smithsonian Tropical Research Institute, Panama City, Panama, USA
| | - Simon W Poulton
- School of Earth and Environment, University of Leeds, Leeds, UK
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4
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Cleveland CC, Reis CRG, Perakis SS, Dynarski KA, Batterman SA, Crews TE, Gei M, Gundale MJ, Menge DNL, Peoples MB, Reed SC, Salmon VG, Soper FM, Taylor BN, Turner MG, Wurzburger N. Exploring the Role of Cryptic Nitrogen Fixers in Terrestrial Ecosystems: A Frontier in Nitrogen Cycling Research. Ecosystems 2022. [DOI: 10.1007/s10021-022-00804-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Zhou Y, Biro A, Wong MY, Batterman SA, Staver AC. Fire decreases soil enzyme activities and reorganizes microbially-mediated nutrient cycles: A meta-analysis. Ecology 2022; 103:e3807. [PMID: 35811475 DOI: 10.1002/ecy.3807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 03/29/2022] [Accepted: 05/31/2022] [Indexed: 11/07/2022]
Abstract
The biogeochemical signature of fire shapes the functioning of many ecosystems. Fire changes nutrient cycles not only by volatilizing plant material, but also by altering organic matter decomposition-a process regulated by soil extracellular enzyme activities (EEAs). However, our understanding of fire effects on EEAs and their feedbacks to nutrient cycles is incomplete. We conducted a meta-analysis with 301 field studies and found that fire significantly decreased EEAs by ~20-40%. Fire decreased EEAs by reducing soil microbial biomass and organic matter substrates. Soil nitrogen-acquiring EEA declined alongside decreasing available nitrogen, likely from fire-driven volatilization of nitrogen and decreased microbial activity. Fire decreased soil phosphorus-acquiring EEA but increased available phosphorus, likely from pyro-mineralization of organic phosphorus. These findings suggest that fire suppresses soil microbes and consumes their substrates, thereby slowing microbially-mediated nutrient cycles (especially phosphorus) via decreased EEAs. These changes can become increasingly important as fire frequency and severity in many ecosystems continue to shift in response to global change.
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Affiliation(s)
- Yong Zhou
- Yale Institute for Biospheric Studies, Yale University, New Haven, CT, USA.,Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA
| | - Arielle Biro
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA
| | | | - Sarah A Batterman
- Cary Institute of Ecosystem Studies, Millbrook, NY, USA.,School of Geography and Priestley International Centre for Climate, University of Leeds, Leeds, United Kingdom
| | - A Carla Staver
- Yale Institute for Biospheric Studies, Yale University, New Haven, CT, USA.,Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA
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6
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Freschet GT, Pagès L, Iversen CM, Comas LH, Rewald B, Roumet C, Klimešová J, Zadworny M, Poorter H, Postma JA, Adams TS, Bagniewska‐Zadworna A, Bengough AG, Blancaflor EB, Brunner I, Cornelissen JHC, Garnier E, Gessler A, Hobbie SE, Meier IC, Mommer L, Picon‐Cochard C, Rose L, Ryser P, Scherer‐Lorenzen M, Soudzilovskaia NA, Stokes A, Sun T, Valverde‐Barrantes OJ, Weemstra M, Weigelt A, Wurzburger N, York LM, Batterman SA, Gomes de Moraes M, Janeček Š, Lambers H, Salmon V, Tharayil N, McCormack ML. A starting guide to root ecology: strengthening ecological concepts and standardising root classification, sampling, processing and trait measurements. New Phytol 2021; 232:973-1122. [PMID: 34608637 PMCID: PMC8518129 DOI: 10.1111/nph.17572] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [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: 09/24/2019] [Accepted: 03/22/2021] [Indexed: 05/17/2023]
Abstract
In the context of a recent massive increase in research on plant root functions and their impact on the environment, root ecologists currently face many important challenges to keep on generating cutting-edge, meaningful and integrated knowledge. Consideration of the below-ground components in plant and ecosystem studies has been consistently called for in recent decades, but methodology is disparate and sometimes inappropriate. This handbook, based on the collective effort of a large team of experts, will improve trait comparisons across studies and integration of information across databases by providing standardised methods and controlled vocabularies. It is meant to be used not only as starting point by students and scientists who desire working on below-ground ecosystems, but also by experts for consolidating and broadening their views on multiple aspects of root ecology. Beyond the classical compilation of measurement protocols, we have synthesised recommendations from the literature to provide key background knowledge useful for: (1) defining below-ground plant entities and giving keys for their meaningful dissection, classification and naming beyond the classical fine-root vs coarse-root approach; (2) considering the specificity of root research to produce sound laboratory and field data; (3) describing typical, but overlooked steps for studying roots (e.g. root handling, cleaning and storage); and (4) gathering metadata necessary for the interpretation of results and their reuse. Most importantly, all root traits have been introduced with some degree of ecological context that will be a foundation for understanding their ecological meaning, their typical use and uncertainties, and some methodological and conceptual perspectives for future research. Considering all of this, we urge readers not to solely extract protocol recommendations for trait measurements from this work, but to take a moment to read and reflect on the extensive information contained in this broader guide to root ecology, including sections I-VII and the many introductions to each section and root trait description. Finally, it is critical to understand that a major aim of this guide is to help break down barriers between the many subdisciplines of root ecology and ecophysiology, broaden researchers' views on the multiple aspects of root study and create favourable conditions for the inception of comprehensive experiments on the role of roots in plant and ecosystem functioning.
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Affiliation(s)
- Grégoire T. Freschet
- CEFEUniv Montpellier, CNRS, EPHE, IRD1919 route de MendeMontpellier34293France
- Station d’Ecologie Théorique et ExpérimentaleCNRS2 route du CNRS09200MoulisFrance
| | - Loïc Pagès
- UR 1115 PSHCentre PACA, site AgroparcINRAE84914Avignon cedex 9France
| | - Colleen M. Iversen
- Environmental Sciences Division and Climate Change Science InstituteOak Ridge National LaboratoryOak RidgeTN37831USA
| | - Louise H. Comas
- USDA‐ARS Water Management Research Unit2150 Centre Avenue, Bldg D, Suite 320Fort CollinsCO80526USA
| | - Boris Rewald
- Department of Forest and Soil SciencesUniversity of Natural Resources and Life SciencesVienna1190Austria
| | - Catherine Roumet
- CEFEUniv Montpellier, CNRS, EPHE, IRD1919 route de MendeMontpellier34293France
| | - Jitka Klimešová
- Department of Functional EcologyInstitute of Botany CASDukelska 13537901TrebonCzech Republic
| | - Marcin Zadworny
- Institute of DendrologyPolish Academy of SciencesParkowa 562‐035KórnikPoland
| | - Hendrik Poorter
- Plant Sciences (IBG‐2)Forschungszentrum Jülich GmbHD‐52425JülichGermany
- Department of Biological SciencesMacquarie UniversityNorth RydeNSW2109Australia
| | | | - Thomas S. Adams
- Department of Plant SciencesThe Pennsylvania State UniversityUniversity ParkPA16802USA
| | - Agnieszka Bagniewska‐Zadworna
- Department of General BotanyInstitute of Experimental BiologyFaculty of BiologyAdam Mickiewicz UniversityUniwersytetu Poznańskiego 661-614PoznańPoland
| | - A. Glyn Bengough
- The James Hutton InstituteInvergowrie, Dundee,DD2 5DAUK
- School of Science and EngineeringUniversity of DundeeDundee,DD1 4HNUK
| | | | - Ivano Brunner
- Forest Soils and BiogeochemistrySwiss Federal Research Institute WSLZürcherstr. 1118903BirmensdorfSwitzerland
| | - Johannes H. C. Cornelissen
- Department of Ecological ScienceFaculty of ScienceVrije Universiteit AmsterdamDe Boelelaan 1085Amsterdam1081 HVthe Netherlands
| | - Eric Garnier
- CEFEUniv Montpellier, CNRS, EPHE, IRD1919 route de MendeMontpellier34293France
| | - Arthur Gessler
- Forest DynamicsSwiss Federal Research Institute WSLZürcherstr. 1118903BirmensdorfSwitzerland
- Institute of Terrestrial EcosystemsETH Zurich8092ZurichSwitzerland
| | - Sarah E. Hobbie
- Department of Ecology, Evolution and BehaviorUniversity of MinnesotaSt PaulMN55108USA
| | - Ina C. Meier
- Functional Forest EcologyUniversity of HamburgHaidkrugsweg 122885BarsbütelGermany
| | - Liesje Mommer
- Plant Ecology and Nature Conservation GroupDepartment of Environmental SciencesWageningen University and ResearchPO Box 476700 AAWageningenthe Netherlands
| | | | - Laura Rose
- Station d’Ecologie Théorique et ExpérimentaleCNRS2 route du CNRS09200MoulisFrance
- Senckenberg Biodiversity and Climate Research Centre (BiK-F)Senckenberganlage 2560325Frankfurt am MainGermany
| | - Peter Ryser
- Laurentian University935 Ramsey Lake RoadSudburyONP3E 2C6Canada
| | | | - Nadejda A. Soudzilovskaia
- Environmental Biology DepartmentInstitute of Environmental SciencesCMLLeiden UniversityLeiden2300 RAthe Netherlands
| | - Alexia Stokes
- INRAEAMAPCIRAD, IRDCNRSUniversity of MontpellierMontpellier34000France
| | - Tao Sun
- Institute of Applied EcologyChinese Academy of SciencesShenyang110016China
| | - Oscar J. Valverde‐Barrantes
- International Center for Tropical BotanyDepartment of Biological SciencesFlorida International UniversityMiamiFL33199USA
| | - Monique Weemstra
- CEFEUniv Montpellier, CNRS, EPHE, IRD1919 route de MendeMontpellier34293France
| | - Alexandra Weigelt
- Systematic Botany and Functional BiodiversityInstitute of BiologyLeipzig UniversityJohannisallee 21-23Leipzig04103Germany
| | - Nina Wurzburger
- Odum School of EcologyUniversity of Georgia140 E. Green StreetAthensGA30602USA
| | - Larry M. York
- Biosciences Division and Center for Bioenergy InnovationOak Ridge National LaboratoryOak RidgeTN37831USA
| | - Sarah A. Batterman
- School of Geography and Priestley International Centre for ClimateUniversity of LeedsLeedsLS2 9JTUK
- Cary Institute of Ecosystem StudiesMillbrookNY12545USA
| | - Moemy Gomes de Moraes
- Department of BotanyInstitute of Biological SciencesFederal University of Goiás1974690-900Goiânia, GoiásBrazil
| | - Štěpán Janeček
- School of Biological SciencesThe University of Western Australia35 Stirling HighwayCrawley (Perth)WA 6009Australia
| | - Hans Lambers
- School of Biological SciencesThe University of Western AustraliaCrawley (Perth)WAAustralia
| | - Verity Salmon
- Environmental Sciences Division and Climate Change Science InstituteOak Ridge National LaboratoryOak RidgeTN37831USA
| | - Nishanth Tharayil
- Department of Plant and Environmental SciencesClemson UniversityClemsonSC29634USA
| | - M. Luke McCormack
- Center for Tree ScienceMorton Arboretum, 4100 Illinois Rt. 53LisleIL60532USA
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7
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Freschet GT, Pagès L, Iversen CM, Comas LH, Rewald B, Roumet C, Klimešová J, Zadworny M, Poorter H, Postma JA, Adams TS, Bagniewska-Zadworna A, Bengough AG, Blancaflor EB, Brunner I, Cornelissen JHC, Garnier E, Gessler A, Hobbie SE, Meier IC, Mommer L, Picon-Cochard C, Rose L, Ryser P, Scherer-Lorenzen M, Soudzilovskaia NA, Stokes A, Sun T, Valverde-Barrantes OJ, Weemstra M, Weigelt A, Wurzburger N, York LM, Batterman SA, Gomes de Moraes M, Janeček Š, Lambers H, Salmon V, Tharayil N, McCormack ML. A starting guide to root ecology: strengthening ecological concepts and standardising root classification, sampling, processing and trait measurements. New Phytol 2021. [PMID: 34608637 DOI: 10.1111/nph.17572.hal-03379708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In the context of a recent massive increase in research on plant root functions and their impact on the environment, root ecologists currently face many important challenges to keep on generating cutting-edge, meaningful and integrated knowledge. Consideration of the below-ground components in plant and ecosystem studies has been consistently called for in recent decades, but methodology is disparate and sometimes inappropriate. This handbook, based on the collective effort of a large team of experts, will improve trait comparisons across studies and integration of information across databases by providing standardised methods and controlled vocabularies. It is meant to be used not only as starting point by students and scientists who desire working on below-ground ecosystems, but also by experts for consolidating and broadening their views on multiple aspects of root ecology. Beyond the classical compilation of measurement protocols, we have synthesised recommendations from the literature to provide key background knowledge useful for: (1) defining below-ground plant entities and giving keys for their meaningful dissection, classification and naming beyond the classical fine-root vs coarse-root approach; (2) considering the specificity of root research to produce sound laboratory and field data; (3) describing typical, but overlooked steps for studying roots (e.g. root handling, cleaning and storage); and (4) gathering metadata necessary for the interpretation of results and their reuse. Most importantly, all root traits have been introduced with some degree of ecological context that will be a foundation for understanding their ecological meaning, their typical use and uncertainties, and some methodological and conceptual perspectives for future research. Considering all of this, we urge readers not to solely extract protocol recommendations for trait measurements from this work, but to take a moment to read and reflect on the extensive information contained in this broader guide to root ecology, including sections I-VII and the many introductions to each section and root trait description. Finally, it is critical to understand that a major aim of this guide is to help break down barriers between the many subdisciplines of root ecology and ecophysiology, broaden researchers' views on the multiple aspects of root study and create favourable conditions for the inception of comprehensive experiments on the role of roots in plant and ecosystem functioning.
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Affiliation(s)
- Grégoire T Freschet
- CEFE, Univ Montpellier, CNRS, EPHE, IRD, 1919 route de Mende, Montpellier, 34293, France
- Station d'Ecologie Théorique et Expérimentale, CNRS, 2 route du CNRS, 09200, Moulis, France
| | - Loïc Pagès
- UR 1115 PSH, Centre PACA, site Agroparc, INRAE, 84914, Avignon cedex 9, France
| | - Colleen M Iversen
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Louise H Comas
- USDA-ARS Water Management Research Unit, 2150 Centre Avenue, Bldg D, Suite 320, Fort Collins, CO, 80526, USA
| | - Boris Rewald
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna, 1190, Austria
| | - Catherine Roumet
- CEFE, Univ Montpellier, CNRS, EPHE, IRD, 1919 route de Mende, Montpellier, 34293, France
| | - Jitka Klimešová
- Department of Functional Ecology, Institute of Botany CAS, Dukelska 135, 37901, Trebon, Czech Republic
| | - Marcin Zadworny
- Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, 62-035, Kórnik, Poland
| | - Hendrik Poorter
- Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
- Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
| | - Johannes A Postma
- Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
| | - Thomas S Adams
- Department of Plant Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Agnieszka Bagniewska-Zadworna
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - A Glyn Bengough
- The James Hutton Institute, Invergowrie, Dundee,, DD2 5DA, UK
- School of Science and Engineering, University of Dundee, Dundee,, DD1 4HN, UK
| | - Elison B Blancaflor
- Noble Research Institute, LLC, 2510 Sam Noble Parkway, Ardmore, OK, 73401, USA
| | - Ivano Brunner
- Forest Soils and Biogeochemistry, Swiss Federal Research Institute WSL, Zürcherstr. 111, 8903, Birmensdorf, Switzerland
| | - Johannes H C Cornelissen
- Department of Ecological Science, Faculty of Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, Amsterdam, 1081 HV, the Netherlands
| | - Eric Garnier
- CEFE, Univ Montpellier, CNRS, EPHE, IRD, 1919 route de Mende, Montpellier, 34293, France
| | - Arthur Gessler
- Forest Dynamics, Swiss Federal Research Institute WSL, Zürcherstr. 111, 8903, Birmensdorf, Switzerland
- Institute of Terrestrial Ecosystems, ETH Zurich, 8092, Zurich, Switzerland
| | - Sarah E Hobbie
- Department of Ecology, Evolution and Behavior, University of Minnesota, St Paul, MN, 55108, USA
| | - Ina C Meier
- Functional Forest Ecology, University of Hamburg, Haidkrugsweg 1, 22885, Barsbütel, Germany
| | - Liesje Mommer
- Plant Ecology and Nature Conservation Group, Department of Environmental Sciences, Wageningen University and Research, PO Box 47, 6700 AA, Wageningen, the Netherlands
| | | | - Laura Rose
- Station d'Ecologie Théorique et Expérimentale, CNRS, 2 route du CNRS, 09200, Moulis, France
- Senckenberg Biodiversity and Climate Research Centre (BiK-F), Senckenberganlage 25, 60325, Frankfurt am Main, Germany
| | - Peter Ryser
- Laurentian University, 935 Ramsey Lake Road, Sudbury, ON, P3E 2C6, Canada
| | | | - Nadejda A Soudzilovskaia
- Environmental Biology Department, Institute of Environmental Sciences, CML, Leiden University, Leiden, 2300 RA, the Netherlands
| | - Alexia Stokes
- INRAE, AMAP, CIRAD, IRD, CNRS, University of Montpellier, Montpellier, 34000, France
| | - Tao Sun
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Oscar J Valverde-Barrantes
- International Center for Tropical Botany, Department of Biological Sciences, Florida International University, Miami, FL, 33199, USA
| | - Monique Weemstra
- CEFE, Univ Montpellier, CNRS, EPHE, IRD, 1919 route de Mende, Montpellier, 34293, France
| | - Alexandra Weigelt
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, Johannisallee 21-23, Leipzig, 04103, Germany
| | - Nina Wurzburger
- Odum School of Ecology, University of Georgia, 140 E. Green Street, Athens, GA, 30602, USA
| | - Larry M York
- Biosciences Division and Center for Bioenergy Innovation, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Sarah A Batterman
- School of Geography and Priestley International Centre for Climate, University of Leeds, Leeds, LS2 9JT, UK
- Cary Institute of Ecosystem Studies, Millbrook, NY, 12545, USA
| | - Moemy Gomes de Moraes
- Department of Botany, Institute of Biological Sciences, Federal University of Goiás, 19, 74690-900, Goiânia, Goiás, Brazil
| | - Štěpán Janeček
- School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley (Perth), WA 6009, Australia
| | - Hans Lambers
- School of Biological Sciences, The University of Western Australia, Crawley (Perth), WA, Australia
| | - Verity Salmon
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Nishanth Tharayil
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, 29634, USA
| | - M Luke McCormack
- Center for Tree Science, Morton Arboretum, 4100 Illinois Rt. 53, Lisle, IL, 60532, USA
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8
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Epihov DZ, Saltonstall K, Batterman SA, Hedin LO, Hall JS, van Breugel M, Leake JR, Beerling DJ. Legume-microbiome interactions unlock mineral nutrients in regrowing tropical forests. Proc Natl Acad Sci U S A 2021; 118:e2022241118. [PMID: 33836596 PMCID: PMC7980381 DOI: 10.1073/pnas.2022241118] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Legume trees form an abundant and functionally important component of tropical forests worldwide with N2-fixing symbioses linked to enhanced growth and recruitment in early secondary succession. However, it remains unclear how N2-fixers meet the high demands for inorganic nutrients imposed by rapid biomass accumulation on nutrient-poor tropical soils. Here, we show that N2-fixing trees in secondary Neotropical forests triggered twofold higher in situ weathering of fresh primary silicates compared to non-N2-fixing trees and induced locally enhanced nutrient cycling by the soil microbiome community. Shotgun metagenomic data from weathered minerals support the role of enhanced nitrogen and carbon cycling in increasing acidity and weathering. Metagenomic and marker gene analyses further revealed increased microbial potential beneath N2-fixers for anaerobic iron reduction, a process regulating the pool of phosphorus bound to iron-bearing soil minerals. We find that the Fe(III)-reducing gene pool in soil is dominated by acidophilic Acidobacteria, including a highly abundant genus of previously undescribed bacteria, Candidatus Acidoferrum, genus novus. The resulting dependence of the Fe-cycling gene pool to pH determines the high iron-reducing potential encoded in the metagenome of the more acidic soils of N2-fixers and their nonfixing neighbors. We infer that by promoting the activities of a specialized local microbiome through changes in soil pH and C:N ratios, N2-fixing trees can influence the wider biogeochemical functioning of tropical forest ecosystems in a manner that enhances their ability to assimilate and store atmospheric carbon.
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Affiliation(s)
- Dimitar Z Epihov
- Department of Animal and Plant Sciences, University of Sheffield, S10 2TN Sheffield, United Kingdom;
- Leverhulme Centre for Climate Change Mitigation, University of Sheffield, S10 2TN Sheffield, United Kingdom
| | | | - Sarah A Batterman
- Smithsonian Tropical Research Institute, 0843 Ancón, Panamá, Panama
- School of Geography and Priestley International Centre for Climate, University of Leeds, LS2 9JT Leeds, United Kingdom
- Cary Institute of Ecosystem Studies, Millbrook, NY 12545
| | - Lars O Hedin
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544
| | - Jefferson S Hall
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, 0843 Ancón, Panamá, Panama
| | - Michiel van Breugel
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, 0843 Ancón, Panamá, Panama
- Yale-NUS College, Singapore 138527
- Department of Biological Sciences, National University of Singapore, Singapore 119077
| | - Jonathan R Leake
- Department of Animal and Plant Sciences, University of Sheffield, S10 2TN Sheffield, United Kingdom
- Leverhulme Centre for Climate Change Mitigation, University of Sheffield, S10 2TN Sheffield, United Kingdom
| | - David J Beerling
- Department of Animal and Plant Sciences, University of Sheffield, S10 2TN Sheffield, United Kingdom
- Leverhulme Centre for Climate Change Mitigation, University of Sheffield, S10 2TN Sheffield, United Kingdom
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9
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Kalamandeen M, Gloor E, Johnson I, Agard S, Katow M, Vanbrooke A, Ashley D, Batterman SA, Ziv G, Holder‐Collins K, Phillips OL, Brondizio ES, Vieira I, Galbraith D. Limited biomass recovery from gold mining in Amazonian forests. J Appl Ecol 2020. [DOI: 10.1111/1365-2664.13669] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Michelle Kalamandeen
- School of Geography University of Leeds Leeds UK
- Department of Plant Sciences University of Cambridge Cambridge UK
- Living with Lakes Centre Laurentian University Sudbury ON Canada
| | | | | | | | | | | | - David Ashley
- School of Geography University of Leeds Leeds UK
| | - Sarah A. Batterman
- School of Geography University of Leeds Leeds UK
- Cary Institute of Ecosystem Studies Millbrook NY USA
- Smithsonian Tropical Research Institute Ancon Panama
| | - Guy Ziv
- School of Geography University of Leeds Leeds UK
| | | | | | | | - Ima Vieira
- Museu Paraense Emilio Goeldi Belém Brazil
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10
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Sullivan MJP, Lewis SL, Affum-Baffoe K, Castilho C, Costa F, Sanchez AC, Ewango CEN, Hubau W, Marimon B, Monteagudo-Mendoza A, Qie L, Sonké B, Martinez RV, Baker TR, Brienen RJW, Feldpausch TR, Galbraith D, Gloor M, Malhi Y, Aiba SI, Alexiades MN, Almeida EC, de Oliveira EA, Dávila EÁ, Loayza PA, Andrade A, Vieira SA, Aragão LEOC, Araujo-Murakami A, Arets EJMM, Arroyo L, Ashton P, Aymard C. G, Baccaro FB, Banin LF, Baraloto C, Camargo PB, Barlow J, Barroso J, Bastin JF, Batterman SA, Beeckman H, Begne SK, Bennett AC, Berenguer E, Berry N, Blanc L, Boeckx P, Bogaert J, Bonal D, Bongers F, Bradford M, Brearley FQ, Brncic T, Brown F, Burban B, Camargo JL, Castro W, Céron C, Ribeiro SC, Moscoso VC, Chave J, Chezeaux E, Clark CJ, de Souza FC, Collins M, Comiskey JA, Valverde FC, Medina MC, da Costa L, Dančák M, Dargie GC, Davies S, Cardozo ND, de Haulleville T, de Medeiros MB, del Aguila Pasquel J, Derroire G, Di Fiore A, Doucet JL, Dourdain A, Droissart V, Duque LF, Ekoungoulou R, Elias F, Erwin T, Esquivel-Muelbert A, Fauset S, Ferreira J, Llampazo GF, Foli E, Ford A, Gilpin M, Hall JS, Hamer KC, Hamilton AC, Harris DJ, Hart TB, Hédl R, Herault B, Herrera R, Higuchi N, Hladik A, Coronado EH, Huamantupa-Chuquimaco I, Huasco WH, Jeffery KJ, Jimenez-Rojas E, Kalamandeen M, Djuikouo MNK, Kearsley E, Umetsu RK, Kho LK, Killeen T, Kitayama K, Klitgaard B, Koch A, Labrière N, Laurance W, Laurance S, Leal ME, Levesley A, Lima AJN, Lisingo J, Lopes AP, Lopez-Gonzalez G, Lovejoy T, Lovett JC, Lowe R, Magnusson WE, Malumbres-Olarte J, Manzatto ÂG, Marimon BH, Marshall AR, Marthews T, de Almeida Reis SM, Maycock C, Melgaço K, Mendoza C, Metali F, Mihindou V, Milliken W, Mitchard ETA, Morandi PS, Mossman HL, Nagy L, Nascimento H, Neill D, Nilus R, Vargas PN, Palacios W, Camacho NP, Peacock J, Pendry C, Peñuela Mora MC, Pickavance GC, Pipoly J, Pitman N, Playfair M, Poorter L, Poulsen JR, Poulsen AD, Preziosi R, Prieto A, Primack RB, Ramírez-Angulo H, Reitsma J, Réjou-Méchain M, Correa ZR, de Sousa TR, Bayona LR, Roopsind A, Rudas A, Rutishauser E, Abu Salim K, Salomão RP, Schietti J, Sheil D, Silva RC, Espejo JS, Valeria CS, Silveira M, Simo-Droissart M, Simon MF, Singh J, Soto Shareva YC, Stahl C, Stropp J, Sukri R, Sunderland T, Svátek M, Swaine MD, Swamy V, Taedoumg H, Talbot J, Taplin J, Taylor D, ter Steege H, Terborgh J, Thomas R, Thomas SC, Torres-Lezama A, Umunay P, Gamarra LV, van der Heijden G, van der Hout P, van der Meer P, van Nieuwstadt M, Verbeeck H, Vernimmen R, Vicentini A, Vieira ICG, Torre EV, Vleminckx J, Vos V, Wang O, White LJT, Willcock S, Woods JT, Wortel V, Young K, Zagt R, Zemagho L, Zuidema PA, Zwerts JA, Phillips OL. Long-term thermal sensitivity of Earth’s tropical forests. Science 2020; 368:869-874. [DOI: 10.1126/science.aaw7578] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 03/05/2020] [Indexed: 01/21/2023]
Affiliation(s)
- Martin J. P. Sullivan
- School of Geography, University of Leeds, Leeds, UK
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
| | - Simon L. Lewis
- School of Geography, University of Leeds, Leeds, UK
- Department of Geography, University College London, London, UK
| | | | - Carolina Castilho
- Embrapa Roraima, Brazilian Agricultural Research Corporation (EMBRAPA), Brasília, Brazil
| | - Flávia Costa
- Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Brazil
| | - Aida Cuni Sanchez
- Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO, USA
- Department of Environment and Geography, University of York, York, UK
| | - Corneille E. N. Ewango
- DR Congo Programme, Wildlife Conservation Society, Kisangani, Democratic Republic of Congo
- Centre de Formation et de Recherche en Conservation Forestiere (CEFRECOF), Epulu, Democratic Republic of Congo
- Faculté de Gestion de Ressources Naturelles Renouvelables, Université de Kisangani, Kisangani, Democratic Republic of Congo
| | - Wannes Hubau
- School of Geography, University of Leeds, Leeds, UK
- Service of Wood Biology, Royal Museum for Central Africa, Tervuren, Belgium
- Department of Environment, Laboratory of Wood Technology (Woodlab), Ghent University, Ghent, Belgium
| | - Beatriz Marimon
- UNEMAT - Universidade do Estado de Mato Grosso, Nova Xavantina-MT, Brazil
| | | | - Lan Qie
- School of Life Sciences, University of Lincoln, Lincoln, UK
| | - Bonaventure Sonké
- Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon
| | | | | | | | - Ted R. Feldpausch
- Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | | | - Manuel Gloor
- School of Geography, University of Leeds, Leeds, UK
| | - Yadvinder Malhi
- Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, UK
| | - Shin-Ichiro Aiba
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan
| | | | - Everton C. Almeida
- Instituto de Biodiversidade e Florestas, Universidade Federal do Oeste do Pará, Santarém - PA, Brazil
| | | | - Esteban Álvarez Dávila
- Escuela de Ciencias Agrícolas, Pecuarias y del Medio Ambiente, National Open University and Distance, Bogotá, Colombia
| | | | - Ana Andrade
- Projeto Dinâmica Biológica de Fragmentos Florestais, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | | | - Luiz E. O. C. Aragão
- Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
- National Institute for Space Research (INPE), São José dos Campos, SP, Brazil
| | - Alejandro Araujo-Murakami
- Museo de Historia Natural Noel Kempff Mercado, Universidad Autónoma Gabriel René Moreno, Santa Cruz, Bolivia
| | | | - Luzmila Arroyo
- Dirección de la Carrera de Biología, Universidad Autónoma Gabriel René Moreno, Santa Cruz, Bolivia
| | - Peter Ashton
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, USA
| | - Gerardo Aymard C.
- Programa de Ciencias del Agro y el Mar, Herbario Universitario, Guanare, Venezuela
| | | | | | - Christopher Baraloto
- International Center for Tropical Botany, Department of Biological Sciences, Florida International University, Miami, FL, USA
| | - Plínio Barbosa Camargo
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Jos Barlow
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - Jorcely Barroso
- Centro Multidisciplinar, Universidade Federal do Acre, Cruzeiro do Sul, AC, Brazil
| | - Jean-François Bastin
- Institure of Integrative Biology, ETH Zurich, Zurich, Switzerland
- Department of Environment, Computational and Applied Vegetation Ecology (CAVELab), Ghent University, Ghent, Belgium
| | - Sarah A. Batterman
- School of Geography, University of Leeds, Leeds, UK
- Priestley International Centre for Climate, University of Leeds, Leeds, UK
- Smithsonian Tropical Research Institute, Panama, Panama
- Cary Institute of Ecosystem Studies, Millbrook, NY, USA
| | - Hans Beeckman
- Service of Wood Biology, Royal Museum for Central Africa, Tervuren, Belgium
| | - Serge K. Begne
- School of Geography, University of Leeds, Leeds, UK
- Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon
| | | | - Erika Berenguer
- Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, UK
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | | | - Lilian Blanc
- UR Forest and Societies, CIRAD, Montpellier, France
| | - Pascal Boeckx
- Isotope Bioscience Laboratory (ISOFYS), Ghent University, Ghent, Belgium
| | - Jan Bogaert
- Gembloux Agro-Bio Tech, University of Liège, Liège, Belgium
| | | | - Frans Bongers
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands
| | | | - Francis Q. Brearley
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
| | - Terry Brncic
- Congo Programme, Wildlife Conservation Society, Brazzavile, Republic of Congo
| | | | - Benoit Burban
- INRAE, UMR EcoFoG, CNRS, CIRAD, AgroParisTech, Université des Antilles, Université de Guyane, 97310 Kourou, French Guiana
| | - José Luís Camargo
- Projeto Dinâmica Biológica de Fragmentos Florestais, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | - Wendeson Castro
- Programa de Pós-Graduação Ecologia e Manejo de Recursos Naturais, Universidade Federal do Acre, Rio Branco, AC, Brazil
| | - Carlos Céron
- Herbario Alfredo Paredes, Universidad Central del Ecuador, Quito, Ecuador
| | - Sabina Cerruto Ribeiro
- Centro de Ciências Biológicas e da Natureza, Universidade Federal do Acre, Rio Branco, AC, Brazil
| | | | - Jerôme Chave
- Laboratoire Évolution et Diversité Biologique, UMR 5174 (CNRS/IRD/UPS), CNRS, Toulouse, France
| | | | - Connie J. Clark
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | | | - Murray Collins
- Grantham Research Institute on Climate Change and the Environment, London, UK
- School of Geosciences, University of Edinburgh, Edinburgh, UK
| | - James A. Comiskey
- Inventory and Monitoring Program, National Park Service, Fredericksburg, VA, USA
- Smithsonian Institution, Washington, DC, USA
| | | | | | - Lola da Costa
- Instituto de Geociências, Faculdade de Meteorologia, Universidade Federal do Para, Belém, PA, Brazil
| | - Martin Dančák
- Faculty of Science, Department of Ecology and Environmental Sciences, Palacký University Olomouc, Olomouc, Czech Republic
| | | | - Stuart Davies
- Center for Tropical Forest Science, Smithsonian Tropical Research Institute, Panama, Panama
| | | | - Thales de Haulleville
- Service of Wood Biology, Royal Museum for Central Africa, Tervuren, Belgium
- Gembloux Agro-Bio Tech, University of Liège, Liège, Belgium
| | - Marcelo Brilhante de Medeiros
- Embrapa Genetic Resources and Biotechnology, Brazilian Agricultural Research Corporation (EMBRAPA), Brasília, Brazil
| | | | - Géraldine Derroire
- Cirad, UMR EcoFoG (AgroParisTech, CNRS, INRAE, Université des Antilles, Université de Guyane), Kourou, French Guiana
| | - Anthony Di Fiore
- Department of Anthropology, The University of Texas at Austin, Austin, TX, USA
| | - Jean-Louis Doucet
- Forest Resources Management, Gembloux Agro-Bio Tech, University of Liège, Liège, Belgium
| | - Aurélie Dourdain
- Cirad, UMR EcoFoG (AgroParisTech, CNRS, INRAE, Université des Antilles, Université de Guyane), Kourou, French Guiana
| | - Vincent Droissart
- AMAP, Universite de Montpellier, IRD, CNRS, CIRAD, INRAE, Montpellier, France
| | | | | | - Fernando Elias
- Institute of Biological Sciences, Universidade Federal do Pará, Belém, PA, Brazil
| | - Terry Erwin
- National Museum of Natural History, Smithsonian Institution, Washington, DC, USA
| | | | - Sophie Fauset
- School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, UK
| | - Joice Ferreira
- Embrapa Amazônia Oriental, Brazilian Agricultural Research Corporation (EMBRAPA), Brasília, Brazil
| | | | - Ernest Foli
- Forestry Research Institute of Ghana (FORIG), Kumasi, Ghana
| | | | | | - Jefferson S. Hall
- Smithsonian Institution Forest Global Earth Observatory (ForestGEO), Smithsonian Tropical Research Institute, Washington, DC, USA
| | | | | | | | - Terese B. Hart
- Lukuru Wildlife Research Foundation, Kinshasa, Democratic Republic of Congo
- Division of Vertebrate Zoology, Yale Peabody Museum of Natural History, New Haven, CT, USA
| | - Radim Hédl
- Institute of Botany, Czech Academy of Sciences, Brno, Czech Republic
- Department of Botany, Palacký University in Olomouc, Olomouc, Czech Republic
| | - Bruno Herault
- Isotope Bioscience Laboratory (ISOFYS), Ghent University, Ghent, Belgium
- CIRAD, UPR Forêts et Sociétés, Yamoussoukro, Côte d’Ivoire
- Institut National Polytechnique Félix Houphouët-Boigny, INP-HB, Yamoussoukro, Côte d’Ivoire
| | - Rafael Herrera
- Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela
| | - Niro Higuchi
- Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Brazil
| | - Annette Hladik
- Département Hommes, Natures, Sociétés, Muséum National d'Histoire Naturel, Paris, France
| | | | | | | | - Kathryn J. Jeffery
- Biological and Environmental Sciences, University of Stirling, Stirling, UK
| | | | - Michelle Kalamandeen
- School of Geography, University of Leeds, Leeds, UK
- Living with Lakes Centre, Laurentian University, Sudbury, Canada
- Department of Plant Sciences, University of Cambridge, Cambridge, UK
| | - Marie Noël Kamdem Djuikouo
- Faculté de Gestion de Ressources Naturelles Renouvelables, Université de Kisangani, Kisangani, Democratic Republic of Congo
- Department of Environment, Laboratory of Wood Technology (Woodlab), Ghent University, Ghent, Belgium
- Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon
- Faculty of Science, Department of Botany and Plant Physiology, University of Buea, Buea, Cameroon
| | - Elizabeth Kearsley
- Department of Environment, Computational and Applied Vegetation Ecology (CAVELab), Ghent University, Ghent, Belgium
| | | | - Lip Khoon Kho
- Tropical Peat Research Institute, Malaysian Palm Oil Board, Selangor, Malaysia
| | | | | | | | - Alexander Koch
- Department of Earth Sciences, University of Hong Kong, Pok Ful Lam, Hong Kong Special Administrative Region, China
| | - Nicolas Labrière
- Laboratoire Évolution et Diversité Biologique, UMR 5174 (CNRS/IRD/UPS), CNRS, Toulouse, France
| | - William Laurance
- Centre for Tropical Environmental and Sustainability Science (TESS) and College of Marine and Environmental Sciences, James Cook University, Douglas, QLD, Australia
| | - Susan Laurance
- Centre for Tropical Environmental and Sustainability Science (TESS) and College of Marine and Environmental Sciences, James Cook University, Douglas, QLD, Australia
| | - Miguel E. Leal
- Uganda Programme, Wildlife Conservation Society, Kampala, Uganda
| | | | | | - Janvier Lisingo
- Faculté de Gestion de Ressources Naturelles Renouvelables, Université de Kisangani, Kisangani, Democratic Republic of Congo
| | - Aline P. Lopes
- National Institute for Space Research (INPE), São José dos Campos, SP, Brazil
| | | | - Tom Lovejoy
- Environmental Science and Policy, George Mason University, Fairfax, VA, USA
| | - Jon C. Lovett
- School of Geography, University of Leeds, Leeds, UK
- Royal Botanic Gardens Kew, Richmond, London, UK
| | - Richard Lowe
- Botany Department, University of Ibadan, Ibadan, Nigeria
| | - William E. Magnusson
- Coordenação da Biodiversidade, Instituto Nacional de Pesquisas da Amazônia (INPA), Mauaus, Brazil
| | - Jagoba Malumbres-Olarte
- cE3c – Centre for Ecology, Evolution and Environmental Changes / Azorean Biodiversity Group, Universidade dos Açores, Angra do Heroísmo, Azores, Portugal
- LIBRe – Laboratory for Integrative Biodiversity Research, Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| | - Ângelo Gilberto Manzatto
- Laboratório de Biogeoquímica Ambiental Wolfgang C. Pfeiffer, Universidade Federal de Rondônia, Porto Velho - RO, Brazil
| | - Ben Hur Marimon
- Faculdade de Ciências Agrárias, Biológicas e Sociais Aplicadas, Universidad do Estado de Mato Grosso, Nova Xavantina-MT, Brazil
| | - Andrew R. Marshall
- Department of Environment and Geography, University of York, York, UK
- Tropical Forests and People Research Centre, University of the Sunshine Coast, Sippy Downs, QLD, Australia
- Flamingo Land Ltd., North Yorkshire, UK
| | - Toby Marthews
- UK Centre for Ecology and Hydrology, Wallingford, UK
| | - Simone Matias de Almeida Reis
- UNEMAT - Universidade do Estado de Mato Grosso, Nova Xavantina-MT, Brazil
- Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, UK
| | - Colin Maycock
- School of International Tropical Forestry, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | | | - Casimiro Mendoza
- Escuela de Ciencias Forestales, Unidad Académica del Trópico, Universidad Mayor de San Simón, Sacta, Bolivia
| | - Faizah Metali
- Faculty of Science, Universiti Brunei Darussalam, Brunei
| | - Vianet Mihindou
- Agence Nationale des Parcs Nationaux, Libreville, Gabon
- Ministère de la Forêt, de la Mer, de l'Environnement, Chargé du Plan Climat, Libreville, Gabon
| | | | | | - Paulo S. Morandi
- UNEMAT - Universidade do Estado de Mato Grosso, Nova Xavantina-MT, Brazil
| | - Hannah L. Mossman
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
| | - Laszlo Nagy
- Institute of Biology, University of Campinas, Campinas, SP, Brazil
| | | | - David Neill
- Facultad de Ingeniería Ambiental, Universidad Estatal Amazónica, Puyo, Pastaza, Ecuador
| | - Reuben Nilus
- Forest Research Centre, Sabah Forestry Department, Sepilok, Malaysia
| | - Percy Núñez Vargas
- Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela
| | - Walter Palacios
- Carrera de Ingeniería Forestal, Universidad Tecnica del Norte, Ibarra, Ecuador
| | - Nadir Pallqui Camacho
- School of Geography, University of Leeds, Leeds, UK
- Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela
| | | | | | | | | | - John Pipoly
- Public Communications and Outreach Group, Parks and Recreation Division, Oakland Park, FL, USA
| | - Nigel Pitman
- Keller Science Action Center, Field Museum, Chicago, IL, USA
| | - Maureen Playfair
- Centre for Agricultural Research in Suriname (CELOS), Paramaribo, Suriname
| | - Lourens Poorter
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands
| | - John R. Poulsen
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | | | - Richard Preziosi
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
| | - Adriana Prieto
- Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Leticia, Colombia
| | | | - Hirma Ramírez-Angulo
- Institute of Research for Forestry Development (INDEFOR), Universidad de los Andes, Mérida, Venezuela
| | | | | | | | | | - Lily Rodriguez Bayona
- Centro de Conservacion, Investigacion y Manejo de Areas Naturales, CIMA Cordillera Azul, Lima, Peru
| | - Anand Roopsind
- Iwokrama International Centre for Rainforest Conservation and Development, Georgetown, Guyana
| | - Agustín Rudas
- Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Leticia, Colombia
| | - Ervan Rutishauser
- Smithsonian Tropical Research Institute, Panama, Panama
- Carboforexpert, Geneva, Switzerland
| | | | - Rafael P. Salomão
- Universidade Federal Rural da Amazônia/CAPES, Belém, PA, Brazil
- Museu Paraense Emílio Goeldi, Belém, PA, Brazil
| | - Juliana Schietti
- Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Brazil
| | - Douglas Sheil
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | - Richarlly C. Silva
- Centro de Ciências Biológicas e da Natureza, Universidade Federal do Acre, Rio Branco, AC, Brazil
- Instituto Federal do Acre, Rio Branco, AC, Brazil
| | | | | | - Marcos Silveira
- Centro de Ciências Biológicas e da Natureza, Universidade Federal do Acre, Rio Branco, AC, Brazil
| | - Murielle Simo-Droissart
- Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon
| | - Marcelo Fragomeni Simon
- Embrapa Genetic Resources and Biotechnology, Brazilian Agricultural Research Corporation (EMBRAPA), Brasília, Brazil
| | - James Singh
- Guyana Forestry Commission, Georgetown, Guyana
| | | | - Clement Stahl
- INRAE, UMR EcoFoG, CNRS, CIRAD, AgroParisTech, Université des Antilles, Université de Guyane, 97310 Kourou, French Guiana
| | - Juliana Stropp
- Departamento de Biogeografía y Cambio Global, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Científicas (MNCN-CSIC), Madrid, Spain
| | - Rahayu Sukri
- Faculty of Science, Universiti Brunei Darussalam, Brunei
| | - Terry Sunderland
- Sustainable Landscapes and Food Systems, Center for International Forestry Research, Bogor, Indonesia
- Faculty of Forestry, University of British Columbia, Vancouver, Canada
| | - Martin Svátek
- Department of Forest Botany, Dendrology and Geobiocoenology, Mendel University in Brno, Brno, Czech Republic
| | - Michael D. Swaine
- Department of Plant and Soil Science, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Varun Swamy
- Institute for Conservation Research, San Diego Zoo, San Diego, CA. USA
| | - Hermann Taedoumg
- Department of Plant Biology, Faculty of Sciences, University of Yaounde 1, Yaoundé, Cameroon
- Bioversity International, Yaoundé, Cameroon
| | - Joey Talbot
- School of Geography, University of Leeds, Leeds, UK
| | - James Taplin
- UK Research and Innovation, Innovate UK, London, UK
| | - David Taylor
- Department of Geography, National University of Singapore, Singapore
| | - Hans ter Steege
- Naturalis Biodiversity Center, Leiden, Netherlands
- Systems Ecology, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - John Terborgh
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Raquel Thomas
- Iwokrama International Centre for Rainforest Conservation and Development, Georgetown, Guyana
| | - Sean C. Thomas
- Faculty of Forestry, University of Toronto, Toronto, Canada
| | | | - Peter Umunay
- Wildlife Conservation Society, New York, NY, USA
- Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT, USA
| | | | | | | | | | | | - Hans Verbeeck
- Department of Environment, Computational and Applied Vegetation Ecology (CAVELab), Ghent University, Ghent, Belgium
| | | | | | | | - Emilio Vilanova Torre
- School of Environmental and Forest Sciences, University of Washington, Seattle, OR, USA
| | - Jason Vleminckx
- International Center for Tropical Botany, Department of Biological Sciences, Florida International University, Miami, FL, USA
| | - Vincent Vos
- Centro de Investigación y Promoción del Campesinado, La Paz, Bolivia
- Universidad Autónoma del Beni José Ballivián, Riberalta, Bolivia
| | - Ophelia Wang
- School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ, USA
| | - Lee J. T. White
- Biological and Environmental Sciences, University of Stirling, Stirling, UK
- Agence Nationale des Parcs Nationaux, Libreville, Gabon
- Institut de Recherche en Ecologie Tropicale, Libreville, Gabon
| | - Simon Willcock
- School of Natural Sciences, University of Bangor, Bangor, UK
| | | | - Verginia Wortel
- Forest Management, Centre for Agricultural Research in Suriname (CELOS), Paramaribo, Suriname
| | - Kenneth Young
- Department of Geography and The Environment, University of Texas at Austin, Austin, TX, USA
| | | | - Lise Zemagho
- Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon
| | - Pieter A. Zuidema
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands
| | - Joeri A. Zwerts
- Centre for Agricultural Research in Suriname (CELOS), Paramaribo, Suriname
- Utrecht University, Utrecht, Netherlands
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11
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Stanton DE, Batterman SA, Von Fischer JC, Hedin LO. Rapid nitrogen fixation by canopy microbiome in tropical forest determined by both phosphorus and molybdenum. Ecology 2019; 100:e02795. [DOI: 10.1002/ecy.2795] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 04/26/2019] [Accepted: 05/28/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Daniel E. Stanton
- Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey 08544 USA
- Department of Ecology, Evolution and Behavior University of Minnesota‐Twin Cities Saint Paul Minnesota 55108 USA
| | - Sarah A. Batterman
- Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey 08544 USA
- School of Geography and Priestley International Centre for Climate University of Leeds Leeds LS2 95T United Kingdom
- Smithsonian Tropical Research Institute Ancon Panama
- Cary Institute of Ecosystem Services Millbrook New York 12545 USA
| | | | - Lars O. Hedin
- Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey 08544 USA
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12
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Affiliation(s)
- Sarah A Batterman
- School of Geography, University of Leeds, Leeds, UK. .,Priestley International Centre for Climate, University of Leeds, Leeds, UK. .,Smithsonian Tropical Research Institute, Ancon, Panama.
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13
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O'Sullivan M, Spracklen DV, Batterman SA, Arnold SR, Gloor M, Buermann W. Have Synergies Between Nitrogen Deposition and Atmospheric CO 2 Driven the Recent Enhancement of the Terrestrial Carbon Sink? Global Biogeochem Cycles 2019; 33:163-180. [PMID: 31007383 PMCID: PMC6472506 DOI: 10.1029/2018gb005922] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 12/19/2018] [Accepted: 01/14/2019] [Indexed: 05/26/2023]
Abstract
The terrestrial carbon sink has increased since the turn of this century at a time of increased fossil fuel burning, yet the mechanisms enhancing this sink are not fully understood. Here we assess the hypothesis that regional increases in nitrogen deposition since the early 2000s has alleviated nitrogen limitation and worked in tandem with enhanced CO2 fertilization to increase ecosystem productivity and carbon sequestration, providing a causal link between the parallel increases in emissions and the global land carbon sink. We use the Community Land Model (CLM4.5-BGC) to estimate the influence of changes in atmospheric CO2, nitrogen deposition, climate, and their interactions to changes in net primary production and net biome production. We focus on two periods, 1901-2016 and 1990-2016, to estimate changes in land carbon fluxes relative to historical and contemporary baselines, respectively. We find that over the historical period, nitrogen deposition (14%) and carbon-nitrogen synergy (14%) were significant contributors to the current terrestrial carbon sink, suggesting that long-term increases in nitrogen deposition led to a substantial increase in CO2 fertilization. However, relative to the contemporary baseline, changes in nitrogen deposition and carbon-nitrogen synergy had no substantial contribution to the 21st century increase in global carbon uptake. Nonetheless, we find that increased nitrogen deposition in East Asia since the early 1990s contributed 50% to the overall increase in net biome production over this region, highlighting the importance of carbon-nitrogen interactions. Therefore, potential large-scale changes in nitrogen deposition could have a significant impact on terrestrial carbon cycling and future climate.
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Affiliation(s)
- Michael O'Sullivan
- Institute for Climate and Atmospheric Science, School of Earth and EnvironmentUniversity of LeedsLeedsUK
| | - Dominick V. Spracklen
- Institute for Climate and Atmospheric Science, School of Earth and EnvironmentUniversity of LeedsLeedsUK
| | | | - Steve R. Arnold
- Institute for Climate and Atmospheric Science, School of Earth and EnvironmentUniversity of LeedsLeedsUK
| | | | - Wolfgang Buermann
- Institute for Climate and Atmospheric Science, School of Earth and EnvironmentUniversity of LeedsLeedsUK
- Institute of GeographyAugsburg UniversityAugsburgGermany
- Institute of the Environment and SustainabilityUniversity of California, Los AngelesLos AngelesCAUSA
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14
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Batterman SA, Hall JS, Turner BL, Hedin LO, LaHaela Walter JK, Sheldon P, van Breugel M. Phosphatase activity and nitrogen fixation reflect species differences, not nutrient trading or nutrient balance, across tropical rainforest trees. Ecol Lett 2018; 21:1486-1495. [PMID: 30073753 DOI: 10.1111/ele.13129] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [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: 02/19/2018] [Revised: 03/18/2018] [Accepted: 06/27/2018] [Indexed: 01/25/2023]
Abstract
A fundamental biogeochemical paradox is that nitrogen-rich tropical forests contain abundant nitrogen-fixing trees, which support a globally significant tropical carbon sink. One explanation for this pattern holds that nitrogen-fixing trees can overcome phosphorus limitation in tropical forests by synthesizing phosphatase enzymes to acquire soil organic phosphorus, but empirical evidence remains scarce. We evaluated whether nitrogen fixation and phosphatase activity are linked across 97 trees from seven species, and tested two hypotheses for explaining investment in nutrient strategies: trading nitrogen-for-phosphorus or balancing nutrient demand. Both strategies varied across species but were not explained by nitrogen-for-phosphorus trading or nutrient balance. This indicates that (1) studies of these nutrient strategies require broad sampling within and across species, (2) factors other than nutrient trading must be invoked to resolve the paradox of tropical nitrogen fixation, and (3) nitrogen-fixing trees cannot provide a positive nitrogen-phosphorus-carbon feedback to alleviate nutrient limitation of the tropical carbon sink.
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Affiliation(s)
- Sarah A Batterman
- School of Geography and Priestley International Centre for Climate, University of Leeds, Leeds, UK.,Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA.,Smithsonian Tropical Research Institute, Ancon, Panama
| | - Jefferson S Hall
- Smithsonian Tropical Research Institute, Ancon, Panama.,ForestGEO, Smithsonian Tropical Research Institute, Ancon, Panama
| | | | - Lars O Hedin
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA
| | | | | | - Michiel van Breugel
- Smithsonian Tropical Research Institute, Ancon, Panama.,Yale-NUS College, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore
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15
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Abstract
Fossil evidence from the Rhynie chert indicates that early land plants, which evolved in a high-CO2 atmosphere during the Palaeozoic Era, hosted diverse fungal symbionts. It is hypothesized that the rise of early non-vascular land plants, and the later evolution of roots and vasculature, drove the long-term shift towards a high-oxygen, low CO2 climate that eventually permitted the evolution of mammals and, ultimately, humans. However, very little is known about the productivity of the early terrestrial biosphere, which depended on the acquisition of the limiting nutrient phosphorus via fungal symbiosis. Recent laboratory experiments have shown that plant-fungal symbiotic function is specific to fungal identity, with carbon-for-phosphorus exchange being either enhanced or suppressed under superambient CO2 By incorporating these experimental findings into a biogeochemical model, we show that the differences in these symbiotic nutrient acquisition strategies could greatly alter the plant-driven changes to climate, allowing drawdown of CO2 to glacial levels, and altering the nature of the rise of oxygen. We conclude that an accurate depiction of plant-fungal symbiotic systems, informed by high-CO2 experiments, is key to resolving the question of how the first terrestrial ecosystems altered our planet.This article is part of a discussion meeting issue 'The Rhynie cherts: our earliest terrestrial ecosystem revisited'.
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Affiliation(s)
| | - Sarah A Batterman
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
- Priestley International Centre for Climate, University of Leeds, Leeds LS2 9JT, UK
- Smithsonian Tropical Research Institute, Ancon, Panama
| | - Katie J Field
- Centre for Plant Sciences, School of Biology, University of Leeds, Leeds LS2 9JT, UK
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16
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Menge DNL, Batterman SA, Hedin LO, Liao W, Pacala SW, Taylor BN. Why are nitrogen‐fixing trees rare at higher compared to lower latitudes? Ecology 2017; 98:3127-3140. [DOI: 10.1002/ecy.2034] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 09/08/2017] [Accepted: 09/18/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Duncan N. L. Menge
- Department of Ecology, Evolution, and Environmental Biology Columbia University New York New York 10027 USA
| | - Sarah A. Batterman
- Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey 08544 USA
- School of Geography and Priestley International Centre for Climate University of Leeds Leeds LS2 9JT United Kingdom
- Smithsonian Tropical Research Institute Ancon Panama
| | - Lars O. Hedin
- Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey 08544 USA
| | - Wenying Liao
- Department of Ecology, Evolution, and Environmental Biology Columbia University New York New York 10027 USA
- Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey 08544 USA
| | - Stephen W. Pacala
- Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey 08544 USA
| | - Benton N. Taylor
- Department of Ecology, Evolution, and Environmental Biology Columbia University New York New York 10027 USA
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17
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Epihov DZ, Batterman SA, Hedin LO, Leake JR, Smith LM, Beerling DJ. N 2-fixing tropical legume evolution: a contributor to enhanced weathering through the Cenozoic? Proc Biol Sci 2017; 284:20170370. [PMID: 28814651 PMCID: PMC5563791 DOI: 10.1098/rspb.2017.0370] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 07/12/2017] [Indexed: 11/30/2022] Open
Abstract
Fossil and phylogenetic evidence indicates legume-rich modern tropical forests replaced Late Cretaceous palm-dominated tropical forests across four continents during the early Cenozoic (58-42 Ma). Tropical legume trees can transform ecosystems via their ability to fix dinitrogen (N2) and higher leaf N compared with non-legumes (35-65%), but it is unclear how their evolutionary rise contributed to silicate weathering, the long-term sink for atmospheric carbon dioxide (CO2). Here we hypothesize that the increasing abundance of N2-fixing legumes in tropical forests amplified silicate weathering rates by increased input of fixed nitrogen (N) to terrestrial ecosystems via interrelated mechanisms including increasing microbial respiration and soil acidification, and stimulating forest net primary productivity. We suggest the high CO2 early Cenozoic atmosphere further amplified legume weathering. Evolution of legumes with high weathering rates was probably driven by their high demand for phosphorus and micronutrients required for N2-fixation and nodule formation.
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Affiliation(s)
- Dimitar Z Epihov
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| | - Sarah A Batterman
- School of Geography and Priestley International Centre for Climate, University of Leeds, Leeds LS2 9JT, UK
- Smithsonian Tropical Research Institute, Balboa, Ancon, Panama
| | - Lars O Hedin
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA
| | - Jonathan R Leake
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| | - Lisa M Smith
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| | - David J Beerling
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
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18
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Menge DNL, Batterman SA, Liao W, Taylor BN, Lichstein JW, Ángeles‐Pérez G. Nitrogen‐fixing tree abundance in higher‐latitude North America is not constrained by diversity. Ecol Lett 2017; 20:842-851. [DOI: 10.1111/ele.12778] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 02/20/2017] [Accepted: 04/07/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Duncan N. L. Menge
- Department of Ecology, Evolution, and Environmental Biology Columbia University New York NY 10027 USA
| | - Sarah A. Batterman
- Department of Ecology and Evolutionary Biology Princeton University Princeton NJ 08544 USA
- School of Geography and Priestley International Centre for Climate Leeds University Leeds LS2 9JT UK
| | - Wenying Liao
- Department of Ecology, Evolution, and Environmental Biology Columbia University New York NY 10027 USA
- Department of Ecology and Evolutionary Biology Princeton University Princeton NJ 08544 USA
| | - Benton N. Taylor
- Department of Ecology, Evolution, and Environmental Biology Columbia University New York NY 10027 USA
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19
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Sheffer E, Batterman SA, Levin SA, Hedin LO. Biome-scale nitrogen fixation strategies selected by climatic constraints on nitrogen cycle. Nat Plants 2015; 1:15182. [PMID: 27251717 DOI: 10.1038/nplants.2015.182] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 10/20/2015] [Indexed: 05/13/2023]
Abstract
Dinitrogen fixation by plants (in symbiosis with root bacteria) is a major source of new nitrogen for land ecosystems(1). A long-standing puzzle(2) is that trees capable of nitrogen fixation are abundant in nitrogen-rich tropical forests, but absent or restricted to early successional stages in nitrogen-poor extra-tropical forests. This biome-scale pattern presents an evolutionary paradox(3), given that the physiological cost(4) of nitrogen fixation predicts the opposite pattern: fixers should be out-competed by non-fixers in nitrogen-rich conditions, but competitively superior in nitrogen-poor soils. Here we evaluate whether this paradox can be explained by the existence of different fixation strategies in tropical versus extra-tropical trees: facultative fixers (capable of downregulating fixation(5,6) by sanctioning mutualistic bacteria(7)) are common in the tropics, whereas obligate fixers (less able to downregulate fixation) dominate at higher latitudes. Using a game-theoretic approach, we assess the ecological and evolutionary conditions under which these fixation strategies emerge, and examine their dependence on climate-driven differences in the nitrogen cycle. We show that in the tropics, transient soil nitrogen deficits following disturbance and rapid tree growth favour a facultative strategy and the coexistence of fixers and non-fixers. In contrast, sustained nitrogen deficits following disturbance in extra-tropical forests favour an obligate fixation strategy, and cause fixers to be excluded in late successional stages. We conclude that biome-scale differences in the abundance of nitrogen fixers can be explained by the interaction between individual plant strategies and climatic constraints on the nitrogen cycle over evolutionary time.
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Affiliation(s)
- Efrat Sheffer
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA
- Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, The Hebrew University of Jerusalem, Israel
| | - Sarah A Batterman
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA
- School of Geography, University of Leeds, Leeds, UK
| | - Simon A Levin
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA
| | - Lars O Hedin
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA
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20
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Batterman SA, Hedin LO, van Breugel M, Ransijn J, Craven DJ, Hall JS. Key role of symbiotic dinitrogen fixation in tropical forest secondary succession. Nature 2013; 502:224-7. [PMID: 24037375 DOI: 10.1038/nature12525] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 08/02/2013] [Indexed: 11/09/2022]
Abstract
Forests contribute a significant portion of the land carbon sink, but their ability to sequester CO2 may be constrained by nitrogen, a major plant-limiting nutrient. Many tropical forests possess tree species capable of fixing atmospheric dinitrogen (N2), but it is unclear whether this functional group can supply the nitrogen needed as forests recover from disturbance or previous land use, or expand in response to rising CO2 (refs 6, 8). Here we identify a powerful feedback mechanism in which N2 fixation can overcome ecosystem-scale deficiencies in nitrogen that emerge during periods of rapid biomass accumulation in tropical forests. Over a 300-year chronosequence in Panama, N2-fixing tree species accumulated carbon up to nine times faster per individual than their non-fixing neighbours (greatest difference in youngest forests), and showed species-specific differences in the amount and timing of fixation. As a result of fast growth and high fixation, fixers provided a large fraction of the nitrogen needed to support net forest growth (50,000 kg carbon per hectare) in the first 12 years. A key element of ecosystem functional diversity was ensured by the presence of different N2-fixing tree species across the entire forest age sequence. These findings show that symbiotic N2 fixation can have a central role in nitrogen cycling during tropical forest stand development, with potentially important implications for the ability of tropical forests to sequester CO2.
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Affiliation(s)
- Sarah A Batterman
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA.
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21
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Abstract
UNLABELLED If released in significant amounts, products formed by reactions between ozone (O3) and volatile organic compounds (VOCs) sorbed on activated carbon (AC) filters could degrade indoor air quality (IAQ). Heterogeneous reactions were investigated in laboratory experiments aimed at characterizing reaction products. Effluent air of AC loaded with limonene and exposed to O3 (5.8 ppm) yielded unreacted limonene (501+/-197 microg/m3), low levels of 4-acetyl-1-methylcyclohexene (AMCH) (20+/-2 microg/m3), and limonene oxides (25+/-7 microg/m3). Most of the O3-limonene products remained on the AC, and most (58%) of the limonene remained unreacted on the AC after exposure to a stoichiometric excess of O3 for 48 h. Thus, in addition to known homogenous reactions, O3-limonene reactions occur heterogeneously on AC but to a much lesser extent. However, the fate of 95% of the depleted limonene was not determined; much of the missing portion was attributed to desorption from the AC, but the formation of other secondary indoor air pollutants is possible. VOC-loaded AC air filters exposed to O3 seem unlikely, however, to constitute a significant emission source of reaction products. More studies are necessary to investigate other pollutants, effects of environmental conditions, and VOC releases from AC that may be enhanced by O3 exposure. PRACTICAL IMPLICATIONS Reactions between ozone and certain volatile organic compounds such as limonene (a common ingredient of many consumer products) occurring on the surface of ventilation filters could impact indoor air quality if products are released in significant amounts. This study suggests that although very small amounts of limonene adsorbed on a filter will react with O3, ventilation filters are not likely to be significant sources of ozone oxidation products. More studies are needed to investigate whether ozone exposure enhances desorption of pollutants from ventilation filters and to measure the formation of formaldehyde and other products that are not easily retained by charcoal filters.
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Affiliation(s)
- T A Metts
- Department of Environmental Health, East Tennessee State University, Johnson City, TN 37614-1709, USA.
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22
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Metts TA, Batterman SA. Effect of VOC loading on the ozone removal efficiency of activated carbon filters. Chemosphere 2006; 62:34-44. [PMID: 15961139 DOI: 10.1016/j.chemosphere.2005.04.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2004] [Revised: 03/23/2005] [Accepted: 04/06/2005] [Indexed: 05/03/2023]
Abstract
Activated carbon (AC) filters are used widely in air cleaning to remove volatile organic compounds (VOCs) and ozone (O(3)). This paper investigates the O(3) removal efficiency of AC filters after previous exposure to VOCs. Filter performance was tested using coconut shell AC and two common indoor VOCs, toluene and d-limonene, representing low and high reactivities with O(3). AC dosed with low, medium and high loadings (28-100% of capacity) of VOCs were exposed to humidified and ozonated air. O(3) breakthrough curves were measured, from which O(3) removal capacity and parameters of the Elovich chemisorption equation were determined. VOC-loaded filters were less efficient at removing O(3) and had different breakthrough behavior than unloaded filters. After 80 h of exposure, VOC-loaded AC samples exhibited 75-95% of the O(3) removal capacity of unloaded samples. O(3) breakthrough and removal capacity were not strongly influenced by the VOC-loading rate. Toluene-loaded filters showed rapid O(3) breakthrough due to poisoning of the AC, while pseudo-poisoning (initially higher O(3) adsorption rates that rapidly decrease) is suggested for limonene-loaded filters. Overall, VOC loadings provide an overall reduction in chemisorption rates, a modest reduction in O(3) removal capacity, and sometimes dramatic changes in breakthrough behavior, important considerations in filter applications in environments where both O(3) and VOCs are present.
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Affiliation(s)
- T A Metts
- School of Public Health, University of Michigan, 1400 Washington Heights, Ann Arbor, MI 48109-2029, USA
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23
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Hickey JP, Batterman SA, Chernyak SM. Trends of chlorinated organic contaminants in great lakes trout and walleye from 1970 to 1998. Arch Environ Contam Toxicol 2006; 50:97-110. [PMID: 16328618 DOI: 10.1007/s00244-005-1007-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2005] [Accepted: 06/19/2005] [Indexed: 05/05/2023]
Abstract
Levels of chlorinated organic contaminants in predator fish have been monitored annually in each of the Great Lakes since the 1970s. This article updates earlier reports with data from 1991 to 1998 for lake trout (Salvelinus namaycush) and (Lake Erie only) walleye (Sander vitreus) to provide a record that now extends nearly 30 years. Whole fish were analyzed for a number of industrial contaminants and pesticides, including polychlorinated biphenyls (PCBs), dichloro-diphenyl-trichloroethane (DDT), dieldrin, toxaphene, and mirex, and contaminant trends were quantified using multicompartment models. As in the past, fish from Lakes Michigan, Ontario, and Huron have the highest levels of PCBs, DDT, and dieldrin; Superior has the highest levels of toxaphene; and Ontario has the highest levels of mirex. In the period after curtailment of chemical use, concentrations rapidly decreased, represented by relatively short half-lives from approximately 1 to 9 years. Although trends depend on both the contaminant and the lake, in many cases the rate of decline has been decreasing, and concentrations are gradually approaching an irreducible concentration. For dioxin-like PCBs, levels have not been decreasing during the most recent 5-year period (1994 to 1998). In some cases, the year-to-year variation in contaminant levels is large, mainly because of food-web dynamics. Although this variation sometimes obscures long-term trends, the general pattern of a rapid decrease followed by slowing or leveling-off of the downward trend seems consistent across the Great Lakes, and future improvements of the magnitude seen in the 1970s and early 1980s likely will take much longer.
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Affiliation(s)
- J P Hickey
- United States Geological Survey, Great Lakes Science Center, 1451 Green Road, Ann Arbor, Michigan 48105, USA
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24
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Abstract
This paper characterizes the relationship between occupant activities and indoor air particulate levels in a non-smoking office building. Occupant activities were recorded on video. Particulate concentrations were monitored by three optical particle counters (OPCs) in five size ranges at three heights. Particulate mass concentrations were measured gravimetrically and bioaerosol concentrations were determined by impaction methods. Occupant activities and number concentrations were determined with 1-min resolution over a 1-week period. Occupant activities such as walking past or visiting the monitoring site explained 24-55% of the variation of 1- to 25-micron diameter particle number concentrations. Statistical models associating particulate concentrations with occupant activities depended on the size fraction and included an autocorrelative term. Occupant activities are estimated to contribute up to 10 micrograms m-3 in particulate concentrations per person. Number concentrations of particles smaller than 1 micron had little correlation with indoor activities other than cigarette smoking and were highly correlated with outdoor levels. The method can be used to characterize emissions from activities if rapid measurements can be made and if activities can be coded from the video record.
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Affiliation(s)
- M Luoma
- VTT Building Technology, PL 1804, FIN-02044 VTT, Finland.
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25
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Abstract
Measurements of gaseous and particulate concentrations are used to characterize the indoor environment, but such measurements may reflect temporary conditions that are not representative of longer time periods. Moreover, indoor air quality (IAQ) measurements are autocorrelated, a result of limited mixing and air exchange, cyclic emissions, HVAC operation, and other factors. This article analyzes the autocorrelation and variability of IAQ measurements using time series analysis techniques in conjunction with a simple IAQ model. Autocorrelations may be estimated using the air exchange rate (alpha) and ventilation effectiveness (epsilon) of the building or room under study, or estimated from pollutant measurements. From this, the variability, required sample size, and other sampling parameters are estimated. The method is tested in a case study in which particle number, fungi, bacteria, and carbon dioxide concentrations were continuously measured in an office building over a 1-week period. The estimated air exchange rate (1.4/hr) for area studied was predicted to yield autocorrelation coefficients of approximately 0.5 for measurements collected on 30-min intervals. Autocorrelation coefficients based on airborne measurements (lag 0.5 hr) ranged from 0.5 to 0.7 for 1-25 microm diameter particles, fungi, and CO2, but near zero for particles < or =1 microm diameter and bacteria. As expected, the variability of measurements with the lowest autocorrelation decreased the most at long sampling times. The implications for spaces with low alpha * epsilon products are that measurements may not benefit significantly from longer averaging periods, measurements on any single day may not be representative, and day-to-day variability may be significant. Steps to determine sample sizes, averaging times, and sampling strategies that can improve the representativeness of IAQ measurements are discussed.
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Affiliation(s)
- M Luoma
- VTT Building Technology, Marianna.
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26
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Abstract
A massive fire at a sulfur stockpile in the Western Cape Province of South Africa in December 1995 is estimated to have released over 14,000 t of sulfur dioxide (SO(2)) over a 20-h period. High and persistent winds greatly reduced the effectiveness of fire-fighting activities and increased the severity of impacts. Nearby urban and agricultural areas were seriously affected. Thousands of people were evacuated from the nearby town of Macassar located 2.5-4 km downwind, and at least several deaths occurred. Agricultural impacts ranged over a broad area extending to 30 km from the fire site and included severe damage to plants and some animal deaths. This paper describes the chronology of the fire, the emergency responses, and the immediate impacts. SO(2) concentrations are estimated using dispersion modeling, and predictions are evaluated using available monitoring information. Sensitivity analyses are used to test unknown or uncertain model parameters. The SO(2) concentrations estimated in Macassar reached extremely dangerous levels, at times over the IDLH level (100 ppm). Predictions agree with the available but very limited monitoring data, as well as with the symptomology of Macassar residents and plant damage patterns. Procedures to deal with the limited information and variability in this fire and similar incidents are suggested. The fire is a tragic demonstration of shortcomings in hazardous material management and emergency response.
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Affiliation(s)
- S A Batterman
- Environmental and Industrial Health, University of Michigan, 109 Observatory Drive, Ann Arbor, Michigan, 48109, USA.
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27
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Batterman SA, Franzblau A, D'Arcy JB, Sargent NE, Gross KB, Schreck RM. Breath, urine, and blood measurements as biological exposure indices of short-term inhalation exposure to methanol. Int Arch Occup Environ Health 1998; 71:325-35. [PMID: 9749971 DOI: 10.1007/s004200050288] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [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] [Indexed: 10/28/2022]
Abstract
Due to their transient nature, short-term exposures can be difficult to detect and quantify using conventional monitoring techniques. Biological monitoring may be capable of registering such exposures and may also be used to estimate important toxicological parameters. This paper investigates relationships between methanol concentrations in the blood, urine, and breath of volunteers exposed to methanol vapor at 800 ppm for periods of 0.5, 1, 2, and 8 h. The results indicate factors that must be considered for interpretation of the results of biological monitoring. For methanol, concentrations are not proportional to the exposure duration due to metabolic and other elimination processes that occur concurrently with the exposure. First-order clearance models can be used with blood, breath, or urine concentrations to estimate exposures if the time that has elapsed since the exposure and the model parameters are known. The 0.5 to 2-h periods of exposure were used to estimate the half-life of methanol. Blood data gave a half-life of 1.44+/-0.33 h. Comparable but slightly more variable results were obtained using urine data corrected for voiding time (1.55+/-0.67h) and breath data corrected for mucous membrane desorption (1.40+/-0.38 h). Methanol concentrations in blood lagged some 15-30 min behind the termination of exposure, and concentrations in urine were further delayed. Although breath sampling may be convenient, breath concentrations reflect end-expired or alveolar air only if subjects are in a methanol-free environment for 30 min or more after the exposure. At earlier times, breath concentrations included contributions from airway desorption or diffusion processes. As based on multicompartmental models, the desorption processes have half-lives ranging between 0.6 and 5 min. Preliminary estimates of the mucous membrane reservoir indicate contributions of under 10% for a 0.5-h exposure and smaller effects for longer periods of exposure.
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Affiliation(s)
- S A Batterman
- Environmental and Industrial Health, The University of Michigan, Ann Arbor 48109-2029, USA.
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28
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Abstract
This paper reports on an experimental study of dermal exposure to neat methanol in human volunteers for the purposes of estimating percutaneous absorption rates, permeation kinetics, baseline (pre-exposure) levels of methanol in blood, and inter- and intrasubject variability. A total of 12 volunteers (seven men and five women) were exposed to methanol via one hand for durations of 0 to 16 min in a total of 65 sessions, making this the largest controlled study of percutaneous absorption for this common solvent. In each session, 14 blood samples were collected sequentially and analyzed for methanol. These data were used to derive absorption rates and delivery kinetics using a two compartment model that accounts for elimination and pre-exposure levels. The pre-exposure methanol concentration in blood was 1.7 +/- 0.9 mg 1(-1), and subjects had statistically different mean concentrations. The maximum methanol concentration in blood was reached 1.9 +/- 1.0 h after exposure. Delivery rates from skin into blood lagged exposure by 0.5 h, and methanol continued to enter the systemic circulation for 4 h following exposure. While in vitro studies have reported comparable lag times, the prolonged permeation or epidermal reservoir effect for such miscible solvents has not been previously measured. The mean derived absorption rate, 8.1 +/- 3.7 mg cm-2 h-1, is compatible with that found in the other in vivo study of methanol absorption. Both in vivo absorption rate estimates considerably exceed in vitro estimates. The maximum concentration of methanol in blood following an exposure to one hand lasting approximately 20 min is comparable to that reached following inhalational exposures at a methanol concentration of 200 ppm, the threshold limit value-time weighted average (TLV-TWA). While variability in blood concentrations and absorption rates approached a factor of two, differences between individuals were not statistically significant. The derived absorption and permeation rates provide information regarding kinetics and absorbed dose that can help to interpret biological monitoring data and confirm mathematical models of chemical permeation.
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Affiliation(s)
- S A Batterman
- Department of Environmental and Industrial Health, University of Michigan, Ann Arbor 48109-2029, USA.
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29
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Abstract
/ The extent and use of industry-reported environmental data are increasing, warranting an in-depth analysis of this information. This paper reviews the environmental reporting guidelines issued by several business and nonprofit organizations and evaluates the environmental reports published by the Fortune 50 companies, half of which publish reports. After describing the history of environmental reporting and the content of the guidelines, a comparative evaluation is made to indicate the types of companies producing reports, the topics reported, the intended audiences, the scope and depth of the material reported, and the effectiveness of the reports as communication devices. These reports are mechanisms to enhance a firm's image, public relations, and marketing and are aimed largely at concerned individuals, affected communities, and investors. Significant differences in the content and the depth of reports are seen as firms report on topics that are perceived by the public as high risks. The most complete reports are published by industries with poor or controversial public images, e.g., the chemical and timber industries. Still, no report provided information that was sufficient for comprehensive or comparative analyses of environmental performance. Recommendations are provided to increase the quality and effectiveness of environmental reporting.KEY WORDS: Communication; Environmental management; Performance reporting; Reporting; Stakeholder
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Affiliation(s)
- P Davis-Walling
- GE Plastics 1 Lexan Lane, Building 45 Mt. Vernon, Indiana 47620, USA
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30
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Abstract
Dermal exposures of methanol were administered in a clinical study designed to compare several biological indicators. Four subjects were exposed in five exposure sessions of varying length. In each session, a sequence of measurements of methanol concentrations in blood, breath, and headspace samples of air at exposed and unexposed skin were collected before and after dermal exposures. Skin headspace samples, collected in gas sampling bags, were designed to reflect equilibrium skin: air partitioning. At exposed skin, headspace samples were highly elevated for at least 8 h following exposure, indicating the presence of a methanol reservoir in skin. After exposure, methanol concentrations at exposed skin showed a rapid initial decline, then a slower first-order decrease. Methanol concentrations were clearly detectable in headspace samples at unexposed skin. Substantial transfer from exposed skin occurred due to mechanical contact and washing. When transfer was restricted, surface concentrations at unexposed skin were similar to levels in breath and were strongly correlated to methanol concentrations in blood. While results are preliminary due to the small sample sizes and several unresolved experimental issues, the simple, rapid, and noninvasive skin headspace measurements appear useful as a biological exposure indicator that clearly shows the presence and site of a dermal exposure, and measurements at unexposed skin reflect concentrations in blood.
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Affiliation(s)
- S A Batterman
- Environmental and Industrial Health, University of Michigan, Ann Arbor 48109-2029, USA
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31
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Zellers ET, Batterman SA, Han M, Patrash SJ. Optimal coating selection for the analysis of organic vapor mixtures with polymer-coated surface acoustic wave sensor arrays. Anal Chem 1995; 67:1092-106. [PMID: 7717524 DOI: 10.1021/ac00102a012] [Citation(s) in RCA: 116] [Impact Index Per Article: 4.0] [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] [Indexed: 01/26/2023]
Abstract
A method for determining the optimal set of polymer sensor coatings to include in a surface acoustic wave (SAW) sensor array for the analysis of organic vapors is described. The method combines an extended disjoint principal components regression (EDPCR) pattern recognition analysis with Monte Carlo simulations of sensor responses to rank the various possible coating selections and to estimate the ability of the sensor array to identify any set of vapor analytes. A data base consisting of the calibrated responses of 10 polymer-coated SAW sensors to each of six organic solvent vapors from three chemical classes was generated to demonstrate the method. Responses to the individual vapors were linear over the concentration ranges examined, and coatings were stable over several months of operation. Responses to binary mixtures were additive functions of the individual component responses, even for vapors capable of strong hydrogen bonding. The EDPCR-Monte Carlo method was used to select the four-sensor array that provided the least error in identifying the six vapors, whether present individually or in binary mixtures. The predicted rate of vapor identification (87%) was experimentally verified, and the vapor concentrations were estimated within 10% of experimental values in most cases. The majority of errors in identification occurred when an individual vapor could not be differentiated from a mixture of the same vapor with a much lower concentration of a second component. The selection of optimal coating sets for several ternary vapor mixtures is also examined. Results demonstrate the capabilities of polymer-coated SAW sensor arrays for analyzing of solvent vapor mixtures and the advantages of the EDPCR-Monte Carlo method for predicting and optimizing performance.
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Affiliation(s)
- E T Zellers
- Department of Environmental and Industrial Health, School of Public Health, University of Michigan, Ann Arbor 48109-2029
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32
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