Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.scitotenv.2021.152317 http://hdl.handle.net/11449/223110 |
Resumo: | Fire is an evolutionary environmental filter in tropical savanna ecosystems altering functional diversity and associated C pools in the biosphere and fluxes between the atmosphere and biosphere. Therefore, alterations in fire regimes (e.g. fire exclusion) will strongly influence ecosystem processes and associated dynamics. In those ecosystems C dynamics and functions are underestimated by the fire-induced offset between C output and input. To determine how fire shapes ecosystem C pools and fluxes in an open savanna across recently burned and fire excluded areas, we measured the following metrics: (I) plant diversity including taxonomic (i.e. richness, evenness) and plant functional diversity (i.e. functional diversity, functional richness, functional dispersion and community weighted means); (II) structure (i.e. above- and below-ground biomass, litter accumulation); and (III) functions related to C balance (i.e. net ecosystem carbon dioxide (CO2) exchange (NEE), ecosystem transpiration (ET), soil respiration (soil CO2 efflux), ecosystem water use efficiency (eWUE) and total soil organic C (SOC). We found that fire promoted aboveground live and belowground biomass, including belowground organs, coarse and fine root biomass and contributed to higher biomass allocation belowground. Fire also increased both functional diversity and dispersion. NEE and total SOC were higher in burned plots compared to fire-excluded plots whereas soil respiration recorded lower values in burned areas. Both ET and eWUE were not affected by fire. Fire strongly favored functional diversity, fine root and belowground organ biomass in piecewise SEM models but the role of both functional diversity and ecosystem structure to mediate the effect of fire on ecosystem functions remain unclear. Fire regime will impact C balance, and fire exclusion may lead to lower C input in open savanna ecosystems. |
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Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savannaAbove and belowground interactionsCarbon dynamicsFire-prone ecosystemsFunctional diversityNeotropical savannaResilienceFire is an evolutionary environmental filter in tropical savanna ecosystems altering functional diversity and associated C pools in the biosphere and fluxes between the atmosphere and biosphere. Therefore, alterations in fire regimes (e.g. fire exclusion) will strongly influence ecosystem processes and associated dynamics. In those ecosystems C dynamics and functions are underestimated by the fire-induced offset between C output and input. To determine how fire shapes ecosystem C pools and fluxes in an open savanna across recently burned and fire excluded areas, we measured the following metrics: (I) plant diversity including taxonomic (i.e. richness, evenness) and plant functional diversity (i.e. functional diversity, functional richness, functional dispersion and community weighted means); (II) structure (i.e. above- and below-ground biomass, litter accumulation); and (III) functions related to C balance (i.e. net ecosystem carbon dioxide (CO2) exchange (NEE), ecosystem transpiration (ET), soil respiration (soil CO2 efflux), ecosystem water use efficiency (eWUE) and total soil organic C (SOC). We found that fire promoted aboveground live and belowground biomass, including belowground organs, coarse and fine root biomass and contributed to higher biomass allocation belowground. Fire also increased both functional diversity and dispersion. NEE and total SOC were higher in burned plots compared to fire-excluded plots whereas soil respiration recorded lower values in burned areas. Both ET and eWUE were not affected by fire. Fire strongly favored functional diversity, fine root and belowground organ biomass in piecewise SEM models but the role of both functional diversity and ecosystem structure to mediate the effect of fire on ecosystem functions remain unclear. Fire regime will impact C balance, and fire exclusion may lead to lower C input in open savanna ecosystems.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)National Geographic SocietyLaboratory of Vegetation Ecology Department of Biodiversity Bioscience Institute São Paulo State University (Unesp), Av. 24 A 1515Oklahoma Biological Survey & Department of Microbiology and Plant Biology the University of Oklahoma, 111 E. Chesapeake StreetChair of Restoration Ecology Department of Life Science Systems Technical University of Munich, Emil-Ramann-Str. 6Laboratory of Vegetation Ecology Department of Biodiversity Bioscience Institute São Paulo State University (Unesp), Av. 24 A 1515CNPq: CNPq 141715/2018-9CNPq: CNPq 303988/2018-5FAPESP: FAPESP 2015/06743-0National Geographic Society: NGS 51903C-18Universidade Estadual Paulista (UNESP)the University of OklahomaTechnical University of MunichTeixeira, Juliana [UNESP]Souza, LaraLe Stradic, SoizigFidelis, Alessandra [UNESP]2022-04-28T19:48:45Z2022-04-28T19:48:45Z2022-03-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.scitotenv.2021.152317Science of the Total Environment, v. 812.1879-10260048-9697http://hdl.handle.net/11449/22311010.1016/j.scitotenv.2021.1523172-s2.0-85121770252Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengScience of the Total Environmentinfo:eu-repo/semantics/openAccess2022-04-28T19:48:45Zoai:repositorio.unesp.br:11449/223110Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:21:48.037712Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna |
title |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna |
spellingShingle |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna Teixeira, Juliana [UNESP] Above and belowground interactions Carbon dynamics Fire-prone ecosystems Functional diversity Neotropical savanna Resilience |
title_short |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna |
title_full |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna |
title_fullStr |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna |
title_full_unstemmed |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna |
title_sort |
Fire promotes functional plant diversity and modifies soil carbon dynamics in tropical savanna |
author |
Teixeira, Juliana [UNESP] |
author_facet |
Teixeira, Juliana [UNESP] Souza, Lara Le Stradic, Soizig Fidelis, Alessandra [UNESP] |
author_role |
author |
author2 |
Souza, Lara Le Stradic, Soizig Fidelis, Alessandra [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) the University of Oklahoma Technical University of Munich |
dc.contributor.author.fl_str_mv |
Teixeira, Juliana [UNESP] Souza, Lara Le Stradic, Soizig Fidelis, Alessandra [UNESP] |
dc.subject.por.fl_str_mv |
Above and belowground interactions Carbon dynamics Fire-prone ecosystems Functional diversity Neotropical savanna Resilience |
topic |
Above and belowground interactions Carbon dynamics Fire-prone ecosystems Functional diversity Neotropical savanna Resilience |
description |
Fire is an evolutionary environmental filter in tropical savanna ecosystems altering functional diversity and associated C pools in the biosphere and fluxes between the atmosphere and biosphere. Therefore, alterations in fire regimes (e.g. fire exclusion) will strongly influence ecosystem processes and associated dynamics. In those ecosystems C dynamics and functions are underestimated by the fire-induced offset between C output and input. To determine how fire shapes ecosystem C pools and fluxes in an open savanna across recently burned and fire excluded areas, we measured the following metrics: (I) plant diversity including taxonomic (i.e. richness, evenness) and plant functional diversity (i.e. functional diversity, functional richness, functional dispersion and community weighted means); (II) structure (i.e. above- and below-ground biomass, litter accumulation); and (III) functions related to C balance (i.e. net ecosystem carbon dioxide (CO2) exchange (NEE), ecosystem transpiration (ET), soil respiration (soil CO2 efflux), ecosystem water use efficiency (eWUE) and total soil organic C (SOC). We found that fire promoted aboveground live and belowground biomass, including belowground organs, coarse and fine root biomass and contributed to higher biomass allocation belowground. Fire also increased both functional diversity and dispersion. NEE and total SOC were higher in burned plots compared to fire-excluded plots whereas soil respiration recorded lower values in burned areas. Both ET and eWUE were not affected by fire. Fire strongly favored functional diversity, fine root and belowground organ biomass in piecewise SEM models but the role of both functional diversity and ecosystem structure to mediate the effect of fire on ecosystem functions remain unclear. Fire regime will impact C balance, and fire exclusion may lead to lower C input in open savanna ecosystems. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-04-28T19:48:45Z 2022-04-28T19:48:45Z 2022-03-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.scitotenv.2021.152317 Science of the Total Environment, v. 812. 1879-1026 0048-9697 http://hdl.handle.net/11449/223110 10.1016/j.scitotenv.2021.152317 2-s2.0-85121770252 |
url |
http://dx.doi.org/10.1016/j.scitotenv.2021.152317 http://hdl.handle.net/11449/223110 |
identifier_str_mv |
Science of the Total Environment, v. 812. 1879-1026 0048-9697 10.1016/j.scitotenv.2021.152317 2-s2.0-85121770252 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Science of the Total Environment |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129510347898880 |