Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event

Detalhes bibliográficos
Autor(a) principal: Fuchslueger, Lucia
Data de Publicação: 2016
Outros Autores: Bahn, Michael, Hasibeder, Roland, Kienzl, Sandra, Fritz, Karina, Schmitt, Michael, Watzka, Margarete, Richter, Andreas A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional do INPA
Texto Completo: https://repositorio.inpa.gov.br/handle/1/15385
Resumo: Drought periods are projected to become more severe and more frequent in many European regions. While effects of single strong droughts on plant and microbial carbon (C) dynamics have been studied in some detail, impacts of recurrent drought events are still little understood. We tested whether the legacy of extreme experimental drought affects responses of plant and microbial C and nitrogen (N) turnover to further drought and rewetting. In a mountain grassland, we conducted a 13C pulse-chase experiment during a naturally occurring drought and rewetting event in plots previously exposed to experimental droughts and in ambient controls (AC). After labelling, we traced 13C below-ground allocation and incorporation into soil microbes using phospholipid fatty acid biomarkers. Drought history (DH) had no effects on the standing shoot and fine root plant biomass. However, plants with experimental DH displayed decreased shoot N concentrations and increased fine root N concentrations relative to those in AC. During the natural drought, plants with DH assimilated and allocated less 13C below-ground; moreover, fine root respiration was reduced and not fuelled by fresh C compared to plants in AC. Regardless of DH, microbial biomass remained stable during natural drought and rewetting. Although microbial communities initially differed in their composition between soils with and without DH, they responded to the natural drought and rewetting in a similar way: gram-positive bacteria increased, while fungal and gram-negative bacteria remained stable. In soils with DH, a strongly reduced uptake of recent plant-derived 13C in microbial biomarkers was observed during the natural drought, pointing to a smaller fraction of active microbes or to a microbial community that is less dependent on plant C. Synthesis. Drought history can induce changes in above- vs. below-ground plant N concentrations and affect the response of plant C turnover to further droughts and rewetting by decreasing plant C uptake and below-ground allocation. DH does not affect the responses of the microbial community to further droughts and rewetting, but alters microbial functioning, particularly the turnover of recent plant-derived carbon, during and after further drought periods. © 2016 The Authors. Journal of Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society
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spelling Fuchslueger, LuciaBahn, MichaelHasibeder, RolandKienzl, SandraFritz, KarinaSchmitt, MichaelWatzka, MargareteRichter, Andreas A.2020-05-08T20:40:37Z2020-05-08T20:40:37Z2016https://repositorio.inpa.gov.br/handle/1/1538510.1111/1365-2745.12593Drought periods are projected to become more severe and more frequent in many European regions. While effects of single strong droughts on plant and microbial carbon (C) dynamics have been studied in some detail, impacts of recurrent drought events are still little understood. We tested whether the legacy of extreme experimental drought affects responses of plant and microbial C and nitrogen (N) turnover to further drought and rewetting. In a mountain grassland, we conducted a 13C pulse-chase experiment during a naturally occurring drought and rewetting event in plots previously exposed to experimental droughts and in ambient controls (AC). After labelling, we traced 13C below-ground allocation and incorporation into soil microbes using phospholipid fatty acid biomarkers. Drought history (DH) had no effects on the standing shoot and fine root plant biomass. However, plants with experimental DH displayed decreased shoot N concentrations and increased fine root N concentrations relative to those in AC. During the natural drought, plants with DH assimilated and allocated less 13C below-ground; moreover, fine root respiration was reduced and not fuelled by fresh C compared to plants in AC. Regardless of DH, microbial biomass remained stable during natural drought and rewetting. Although microbial communities initially differed in their composition between soils with and without DH, they responded to the natural drought and rewetting in a similar way: gram-positive bacteria increased, while fungal and gram-negative bacteria remained stable. In soils with DH, a strongly reduced uptake of recent plant-derived 13C in microbial biomarkers was observed during the natural drought, pointing to a smaller fraction of active microbes or to a microbial community that is less dependent on plant C. Synthesis. Drought history can induce changes in above- vs. below-ground plant N concentrations and affect the response of plant C turnover to further droughts and rewetting by decreasing plant C uptake and below-ground allocation. DH does not affect the responses of the microbial community to further droughts and rewetting, but alters microbial functioning, particularly the turnover of recent plant-derived carbon, during and after further drought periods. © 2016 The Authors. Journal of Ecology published by John Wiley & Sons Ltd on behalf of British Ecological SocietyVolume 104, Número 5, Pags. 1453-1465Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessBelowground BiomassBiomass AllocationCarbon IsotopeCommunity CompositionDroughtEcosystem ResilienceFatty AcidGrasslandMicrobial ActivityMicrobial CommunityMountain RegionNitrogenPhospholipidRewettingRoot/shoot RatioSoil-vegetation InteractionTurnoverEuropeNegibacteriaPosibacteriaDrought history affects grassland plant and microbial carbon turnover during and after a subsequent drought eventinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleJournal of Ecologyengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfartigo-inpa.pdfapplication/pdf847007https://repositorio.inpa.gov.br/bitstream/1/15385/1/artigo-inpa.pdf8f8ec2d4c2abcab5073e224da796e5acMD511/153852020-07-14 11:05:38.376oai:repositorio:1/15385Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-14T15:05:38Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false
dc.title.en.fl_str_mv Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
title Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
spellingShingle Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
Fuchslueger, Lucia
Belowground Biomass
Biomass Allocation
Carbon Isotope
Community Composition
Drought
Ecosystem Resilience
Fatty Acid
Grassland
Microbial Activity
Microbial Community
Mountain Region
Nitrogen
Phospholipid
Rewetting
Root/shoot Ratio
Soil-vegetation Interaction
Turnover
Europe
Negibacteria
Posibacteria
title_short Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
title_full Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
title_fullStr Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
title_full_unstemmed Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
title_sort Drought history affects grassland plant and microbial carbon turnover during and after a subsequent drought event
author Fuchslueger, Lucia
author_facet Fuchslueger, Lucia
Bahn, Michael
Hasibeder, Roland
Kienzl, Sandra
Fritz, Karina
Schmitt, Michael
Watzka, Margarete
Richter, Andreas A.
author_role author
author2 Bahn, Michael
Hasibeder, Roland
Kienzl, Sandra
Fritz, Karina
Schmitt, Michael
Watzka, Margarete
Richter, Andreas A.
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Fuchslueger, Lucia
Bahn, Michael
Hasibeder, Roland
Kienzl, Sandra
Fritz, Karina
Schmitt, Michael
Watzka, Margarete
Richter, Andreas A.
dc.subject.eng.fl_str_mv Belowground Biomass
Biomass Allocation
Carbon Isotope
Community Composition
Drought
Ecosystem Resilience
Fatty Acid
Grassland
Microbial Activity
Microbial Community
Mountain Region
Nitrogen
Phospholipid
Rewetting
Root/shoot Ratio
Soil-vegetation Interaction
Turnover
Europe
Negibacteria
Posibacteria
topic Belowground Biomass
Biomass Allocation
Carbon Isotope
Community Composition
Drought
Ecosystem Resilience
Fatty Acid
Grassland
Microbial Activity
Microbial Community
Mountain Region
Nitrogen
Phospholipid
Rewetting
Root/shoot Ratio
Soil-vegetation Interaction
Turnover
Europe
Negibacteria
Posibacteria
description Drought periods are projected to become more severe and more frequent in many European regions. While effects of single strong droughts on plant and microbial carbon (C) dynamics have been studied in some detail, impacts of recurrent drought events are still little understood. We tested whether the legacy of extreme experimental drought affects responses of plant and microbial C and nitrogen (N) turnover to further drought and rewetting. In a mountain grassland, we conducted a 13C pulse-chase experiment during a naturally occurring drought and rewetting event in plots previously exposed to experimental droughts and in ambient controls (AC). After labelling, we traced 13C below-ground allocation and incorporation into soil microbes using phospholipid fatty acid biomarkers. Drought history (DH) had no effects on the standing shoot and fine root plant biomass. However, plants with experimental DH displayed decreased shoot N concentrations and increased fine root N concentrations relative to those in AC. During the natural drought, plants with DH assimilated and allocated less 13C below-ground; moreover, fine root respiration was reduced and not fuelled by fresh C compared to plants in AC. Regardless of DH, microbial biomass remained stable during natural drought and rewetting. Although microbial communities initially differed in their composition between soils with and without DH, they responded to the natural drought and rewetting in a similar way: gram-positive bacteria increased, while fungal and gram-negative bacteria remained stable. In soils with DH, a strongly reduced uptake of recent plant-derived 13C in microbial biomarkers was observed during the natural drought, pointing to a smaller fraction of active microbes or to a microbial community that is less dependent on plant C. Synthesis. Drought history can induce changes in above- vs. below-ground plant N concentrations and affect the response of plant C turnover to further droughts and rewetting by decreasing plant C uptake and below-ground allocation. DH does not affect the responses of the microbial community to further droughts and rewetting, but alters microbial functioning, particularly the turnover of recent plant-derived carbon, during and after further drought periods. © 2016 The Authors. Journal of Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society
publishDate 2016
dc.date.issued.fl_str_mv 2016
dc.date.accessioned.fl_str_mv 2020-05-08T20:40:37Z
dc.date.available.fl_str_mv 2020-05-08T20:40:37Z
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 https://repositorio.inpa.gov.br/handle/1/15385
dc.identifier.doi.none.fl_str_mv 10.1111/1365-2745.12593
url https://repositorio.inpa.gov.br/handle/1/15385
identifier_str_mv 10.1111/1365-2745.12593
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Volume 104, Número 5, Pags. 1453-1465
dc.rights.driver.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Journal of Ecology
publisher.none.fl_str_mv Journal of Ecology
dc.source.none.fl_str_mv reponame:Repositório Institucional do INPA
instname:Instituto Nacional de Pesquisas da Amazônia (INPA)
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instname_str Instituto Nacional de Pesquisas da Amazônia (INPA)
instacron_str INPA
institution INPA
reponame_str Repositório Institucional do INPA
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