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Climate change and ecosystems dynamics over the last 6000 years in the Middle Atlas, Morocco

dc.rights.licenseopenen_US
hal.structure.identifierMarine Geosciences laboratory [URAC 45]
hal.structure.identifierLaboratoire de Géo-ressources, Unité associée au CNRST (URAC 42) [LGR]
hal.structure.identifierInstitut des Sciences de l'Evolution de Montpellier [UMR ISEM]
dc.contributor.authorNOURELBAIT, Majda
hal.structure.identifierLaboratoire de Géo-ressources, Unité associée au CNRST (URAC 42) [LGR]
dc.contributor.authorRHOUJJATI, Ali
hal.structure.identifierLaboratoire de Géo-ressources, Unité associée au CNRST (URAC 42) [LGR]
dc.contributor.authorBENKADDOUR, Abdelfattah
hal.structure.identifierInstitut des Sciences de l'Evolution de Montpellier [UMR ISEM]
dc.contributor.authorCARRÉ, Matthieu
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorEYNAUD, Frederique
IDREF: 144113570
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, Philippe
IDREF: 154067628
hal.structure.identifierInstitut des Sciences de l'Evolution de Montpellier [UMR ISEM]
dc.contributor.authorCHEDDADI, Rachid
dc.date.accessioned2024-10-11T09:27:59Z
dc.date.available2024-10-11T09:27:59Z
dc.date.issued2016
dc.identifier.issn1814-9324en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/202426
dc.description.abstractEnThe present study aims at reconstructing past climate changes and their environmental impacts on plant ecosystems during the last 6000 years in the Middle Atlas, Morocco. Mean January temperature (Tjan), annual precipitation (Pann), winter (Pw) and summer (Ps) precipitation, and a seasonal index (SI) have all been quantified from a fossil pollen record. Several bio- and geo-chemical elements have also been analysed to evaluate the links between past climate, landscape, and ecosystem changes.Over the last 6000 years, climate has changed within a low temperature and precipitation range with a trend of aridity and warming towards the present. Tjan has varied within a ca. 2 °C range, and Pann within less than 100 mm yr-1. The long-term changes reconstructed in our record between 6 ka cal BP and today are consistent with the aridity trend observed in the Mediterranean basin. Despite the overall limited range of climate fluctuation, we observe major changes in the ecosystem composition, the carbon isotopic contents of organic matter (δ13C), the total organic carbon and nitrogen amount, and the carbon to nitrogen ratio (C / N) after ca. 3750 cal BP. The main ecosystem changes correspond to a noticeable transition in the conifer forest between the Atlas cedar, which expanded after 3750 cal BP, and the pine forest. These vegetation changes impacted the sedimentation type and its composition in the lake.Between 5500 and 5000 cal BP, we observe an abrupt change in all proxies which is coherent with a decrease in Tjan without a significant change in the overall amount of precipitation.
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enClimate change and ecosystems dynamics over the last 6000 years in the Middle Atlas, Morocco
dc.typeArticle de revueen_US
dc.identifier.doi10.5194/cp-12-1029-2016en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Climatologieen_US
dc.subject.halSciences du Vivant [q-bio]/Ecologie, Environnement/Bioclimatologieen_US
dc.subject.halSciences de l'environnement/Milieux et Changements globauxen_US
bordeaux.journalClimate of the Pasten_US
bordeaux.page1029-1042en_US
bordeaux.volume12en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue4en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-03063918
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=Climate%20of%20the%20Past&rft.date=2016&rft.volume=12&rft.issue=4&rft.spage=1029-1042&rft.epage=1029-1042&rft.eissn=1814-9324&rft.issn=1814-9324&rft.au=NOURELBAIT,%20Majda&RHOUJJATI,%20Ali&BENKADDOUR,%20Abdelfattah&CARR%C3%89,%20Matthieu&EYNAUD,%20Frederique&rft.genre=article


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