Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/15385
Registro completo de metadados
Campo DCValorIdioma
dc.contributor.authorFuchslueger, Lucia-
dc.contributor.authorBahn, Michael-
dc.contributor.authorHasibeder, Roland-
dc.contributor.authorKienzl, Sandra-
dc.contributor.authorFritz, Karina-
dc.contributor.authorSchmitt, Michael-
dc.contributor.authorWatzka, Margarete-
dc.contributor.authorRichter, Andreas A.-
dc.date.accessioned2020-05-08T20:40:37Z-
dc.date.available2020-05-08T20:40:37Z-
dc.date.issued2016-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/15385-
dc.description.abstractDrought 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 Societyen
dc.language.isoenpt_BR
dc.relation.ispartofVolume 104, Número 5, Pags. 1453-1465pt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectBelowground Biomassen
dc.subjectBiomass Allocationen
dc.subjectCarbon Isotopeen
dc.subjectCommunity Compositionen
dc.subjectDroughten
dc.subjectEcosystem Resilienceen
dc.subjectFatty Aciden
dc.subjectGrasslanden
dc.subjectMicrobial Activityen
dc.subjectMicrobial Communityen
dc.subjectMountain Regionen
dc.subjectNitrogenen
dc.subjectPhospholipiden
dc.subjectRewettingen
dc.subjectRoot/shoot Ratioen
dc.subjectSoil-vegetation Interactionen
dc.subjectTurnoveren
dc.subjectEuropeen
dc.subjectNegibacteriaen
dc.subjectPosibacteriaen
dc.titleDrought history affects grassland plant and microbial carbon turnover during and after a subsequent drought eventen
dc.typeArtigopt_BR
dc.identifier.doi10.1111/1365-2745.12593-
dc.publisher.journalJournal of Ecologypt_BR
Aparece nas coleções:Artigos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
artigo-inpa.pdf827,16 kBAdobe PDFThumbnail
Visualizar/Abrir


Este item está licenciada sob uma Licença Creative Commons Creative Commons