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Competition, facilitation and environmental severity shape the relationship between local and regional species richness in plant communities

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMICHALET, Richard
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMAALOUF, Jean Paul
hal.structure.identifierLaboratoire d'Ecologie Alpine [LECA]
hal.structure.identifierStation alpine Joseph Fourier - UMS 3370 [SAJF]
dc.contributor.authorCHOLER, Philippe
hal.structure.identifierEcosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
dc.contributor.authorCLÉMENT, Bernard
hal.structure.identifierOffice national des forêts [ONF]
dc.contributor.authorROSEBERY, David
dc.contributor.authorROYER, Jean-Marie
hal.structure.identifierDepartment of Evolutionary Biology and Environmental Studies [IEU]
dc.contributor.authorSCHÖB, Christian
hal.structure.identifierDepartment of Biology [York]
dc.contributor.authorLORTIE, Christopher J.
dc.date.accessioned2024-05-30T13:18:28Z
dc.date.available2024-05-30T13:18:28Z
dc.date.issued2014-10-20
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/200167
dc.description.abstractEnUnderstanding the relative contribution of local and regional processes to local species richness is an important ecological question and a subject of controversy between macroecologists and community ecologists. We test the hypothesis that the contribution of local and regional processes is dependent on environmental conditions and that the eff ect of regional processes should be the highest in communities from intermediate positions along environmental severity gradients due to the importance of facilitation. We used the recently developed log-ratio method to analyze the relationship between local species richness (LSR) and regional species richness (RSR) for 13 plant communities from 4 habitat types of France (coastal sand dunes, oceanic heathlands, alpine grasslands, lowland calcareous grasslands). Each habitat type wassplit in 3 – 4 communities using multivariate analyses to identify the relative importance of stress, disturbance, competition, and facilitation functioning within the 13 communities. We found that the LSR/RSR relationship was highly dependent on environmental conditions with saturated communities occurring more frequently than unsaturated communities highlighting the relative importance of local drivers on species richness. We argued that competition was most likely the main source of community saturation whilst facilitation likely contributed to enhancing the importance of the regional species pool for all habitat types. However, the eff ect of facilitation might be stronger in the disturbed than in the stressed systems because unsaturated curves were only observed in the former conditions. In extreme conditions of disturbance LSR was only controlled by the intensity of disturbance. Th is eff ect was not observed in extreme stress conditions. Our study provides support for the emerging balance theory that both local and regional processes are important in nature with their relative contribution depending on environmental conditions. Additionally, this synthesis strongly suggests that facilitation contributes to an important process – the influence of regional species pool on local species richness.
dc.language.isoENen_US
dc.title.enCompetition, facilitation and environmental severity shape the relationship between local and regional species richness in plant communities
dc.typeArticle de revueen_US
dc.identifier.doi10.1111/ecog.01106en_US
dc.subject.halSciences de l'environnement/Biodiversité et Ecologieen_US
bordeaux.journalEcographyen_US
bordeaux.page1-11en_US
bordeaux.volume37en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamECOBIOCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-01118668
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecography&rft.date=2014-10-20&rft.volume=37&rft.spage=1-11&rft.epage=1-11&rft.au=MICHALET,%20Richard&MAALOUF,%20Jean%20Paul&CHOLER,%20Philippe&CL%C3%89MENT,%20Bernard&ROSEBERY,%20David&rft.genre=article


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