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Stronger Short-Term Effects of Mowing Than Extreme Summer Weather on a Subalpine Grassland

hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBENOT, Marie-Lise
hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
hal.structure.identifierDepartment of Biology and Biocenter Oulu
dc.contributor.authorSACCONE, Patrick
hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
dc.contributor.authorPAUTRAT, Emmanuelle
hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
dc.contributor.authorVICENTE, Rachel
hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
dc.contributor.authorCOLACE, Marie-Pascale
hal.structure.identifierStation alpine Joseph Fourier - UMS 3370 [SAJF]
dc.contributor.authorGRIGULIS, Karl
hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
dc.contributor.authorCLEMENT, Jean-Christophe
hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
dc.contributor.authorLAVOREL, Sandra
dc.date.issued2014
dc.identifier.issn1432-9840
dc.description.abstractEnMowing is known to favor plant diversity and influence ecosystem functioning in semi-natural grasslands. This effect could be influenced by climate variability, especially in regions with harsh climate, such as subalpine zones. In particular, short-term extreme weather fluctuations may induce rapid plant responses, affecting in turn the response to mowing. We tested the effects of concomitant summer weather manipulation and mowing on a subalpine grassland in the Central French Alps for two consecutive years. We addressed two questions: (1) How is a subalpine grassland affected by extreme summer weather? (2) Does extreme summer weather alter mowing effects on the grassland plant diversity and functioning? We used a multi-level, integrative approach assessing the responses of six abundant plant species, as well as effects on plant community structure, biomass production, and litter decomposition rates. Extreme summer weather was simulated by increasing summer temperature by 1.1°C, and decreasing summer rainfall by 80%—resulting in a 30% decrease in total annual precipitation. In addition, a heatwave event was simulated during the first year of the experiment. This weather manipulation was combined with a late-summer mowing treatment (mown vs. unmown). Extreme summer weather mainly increased leaf senescence and decreased plant vegetative growth. Leaf litter decomposition was slowed, but only for species characterized by the fastest rates of litter decomposition. Mowing increased plant diversity by restricting the dominant grass species, thereby favoring subordinates. In the short term, this subalpine grassland was rather resistant to extreme summer weather, whereas mowing cessation remained the main factor affecting its biodiversity.
dc.language.isoen
dc.publisherSpringer Verlag
dc.subject.enbiomass production
dc.subject.enclimate variability
dc.subject.encommunity parameters
dc.subject.enheat-wave
dc.subject.ensummer drought
dc.subject.enplant responses
dc.subject.enlitter decomposition
dc.subject.enwarming
dc.title.enStronger Short-Term Effects of Mowing Than Extreme Summer Weather on a Subalpine Grassland
dc.typeArticle de revue
dc.identifier.doi10.1007/s10021-013-9734-4
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.subject.halSciences de l'environnement/Biodiversité et Ecologie
bordeaux.journalEcosystems
bordeaux.page458-472
bordeaux.volume17
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-01688251
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01688251v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecosystems&rft.date=2014&rft.volume=17&rft.issue=3&rft.spage=458-472&rft.epage=458-472&rft.eissn=1432-9840&rft.issn=1432-9840&rft.au=BENOT,%20Marie-Lise&SACCONE,%20Patrick&PAUTRAT,%20Emmanuelle&VICENTE,%20Rachel&COLACE,%20Marie-Pascale&rft.genre=article


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