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Interactive effects of climate and topography on soil salinity and vegetation zonation in North‐African continental saline depressions

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCHAIEB, Ghassen
dc.contributor.authorABDELLY, Chedly
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMICHALET, Richard
dc.date.accessioned2024-06-06T12:20:28Z
dc.date.available2024-06-06T12:20:28Z
dc.date.issued2019-02-15
dc.identifier.issn1100-9233en_US
dc.identifier.urioai:crossref.org:10.1111/jvs.12693
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/200316
dc.description.abstractEnQuestions: Complex distal factors such as climate and topography can interact to drive direct proximal ecological gradients and vegetation zonation in geographical and ecological space, in particular salinity and soil moisture in arid climates. We pose the following questions: (a) Does increasing climate aridity alter direct water and salinity gradients along topography gradients in saline depressions in arid climates? (b) Do these effects of increasing climate aridity in turn alter vegetation life-form zonation? (c) Does increasing climate aridity alter community composition along the zonation? Study site: Continental saline depressions of the Mediterranean arid climate of central and southern Tunisia. Methods: We sampled vegetation structure, diversity, and composition and environmental variables at five positions along the topography gradient of continental saline depressions in wet and dry conditions. Results: Climate aridity altered salinity gradients and vegetation structure but not diversity and community composition. Salinity increased with increasing aridity at the lowest positions of the depressions but decreased with increasing aridity at their highest positions. Total vegetation cover and relative abundance of therophytes decreased, whereas relative abundance of chamaephytes increased with increasing climate aridity at the upper habitats. Conclusions: Ecological factors acting at a regional scale can alter the spatial variation of other ecological factors acting at smaller spatial scales, ultimately explaining vegetation zonation in continental saline depressions. Salinity collapses with increasing aridity.
dc.language.isoENen_US
dc.sourcecrossref
dc.subject.enAridity
dc.subject.enChamaephytes
dc.subject.enComplex Gradients
dc.subject.enContinental Saline Depressions
dc.subject.enDirect Gradients
dc.subject.enSalinity
dc.subject.enTherophytes
dc.title.enInteractive effects of climate and topography on soil salinity and vegetation zonation in North‐African continental saline depressions
dc.title.alternativeJ Veg Scien_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1111/jvs.12693en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalJournal of Vegetation Scienceen_US
bordeaux.page312-321en_US
bordeaux.volume30en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue2en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamECOBIOCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04603546
hal.version1
hal.date.transferred2024-06-06T12:20:30Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
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