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Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO 2 , warming, and drought

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMAXWELL, Tania
dc.contributor.authorCANARINI, Alberto
dc.contributor.authorBOGDANOVIC, Ivana
dc.contributor.authorBÖCKLE, Theresa
dc.contributor.authorMARTIN, Victoria
dc.contributor.authorNOLL, Lisa
dc.contributor.authorPROMMER, Judith
dc.contributor.authorSÉNECA, Joana
dc.contributor.authorSIMON, Eva
hal.structure.identifierUniversity of Hohenheim
dc.contributor.authorPIEPHO, Hans‐peter
hal.structure.identifierAgricultural Research & Education Centre Raumberg–Gumpenstein
dc.contributor.authorHERNDL, Markus
hal.structure.identifierAgricultural Research & Education Centre Raumberg–Gumpenstein
dc.contributor.authorPÖTSCH, Erich
dc.contributor.authorKAISER, Christina
dc.contributor.authorRICHTER, Andreas
hal.structure.identifierLeopold Franzens Universität Innsbruck - University of Innsbruck
dc.contributor.authorBAHN, Michael
dc.contributor.authorWANEK, Wolfgang
dc.date.accessioned2024-04-08T11:49:09Z
dc.date.available2024-04-08T11:49:09Z
dc.date.issued2022-01-10
dc.identifier.issn1354-1013
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195326
dc.description.abstractEnDepolymerization of high-molecular weight organic nitrogen (N) represents the major bottleneck of soil N cycling and yet is poorly understood compared to the subsequent inorganic N processes. Given the importance of organic N cycling and the rise of global change, we investigated the responses of soil protein depolymerization and microbial amino acid consumption to increased temperature, elevated atmospheric CO2, and drought. The study was conducted in a global change facility in a managed montane grassland in Austria, where elevated CO2 (eCO(2)) and elevated temperature (eT) were stimulated for 4 years, and were combined with a drought event. Gross protein depolymerization and microbial amino acid consumption rates (alongside with gross organic N mineralization and nitrification) were measured using N-15 isotope pool dilution techniques. Whereas eCO(2) showed no individual effect, eT had distinct effects which were modulated by season, with a negative effect of eT on soil organic N process rates in spring, neutral effects in summer, and positive effects in fall. We attribute this to a combination of changes in substrate availability and seasonal temperature changes. Drought led to a doubling of organic N process rates, which returned to rates found under ambient conditions within 3 months after rewetting. Notably, we observed a shift in the control of soil protein depolymerization, from plant substrate controls under continuous environmental change drivers (eT and eCO(2)) to controls via microbial turnover and soil organic N availability under the pulse disturbance (drought). To the best of our knowledge, this is the first study which analyzed the individual versus combined effects of multiple global change factors and of seasonality on soil organic N processes and thereby strongly contributes to our understanding of terrestrial N cycling in a future world.
dc.language.isoen
dc.publisherWiley
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enamino acid consumption
dc.subject.enclimate warming
dc.subject.endrought
dc.subject.enelevated CO2
dc.subject.enprotein depolymerization
dc.subject.ensoil nitrogen cycling
dc.subject.enT-FACE
dc.title.enContrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO 2 , warming, and drought
dc.typeArticle de revue
dc.identifier.doi10.1111/gcb.16035
dc.subject.halSciences de l'environnement
bordeaux.journalGlobal Change Biology
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-03557343
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03557343v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Global%20Change%20Biology&rft.date=2022-01-10&rft.eissn=1354-1013&rft.issn=1354-1013&rft.au=MAXWELL,%20Tania&CANARINI,%20Alberto&BOGDANOVIC,%20Ivana&B%C3%96CKLE,%20Theresa&MARTIN,%20Victoria&rft.genre=article


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