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Stable isotopes in deep-sea living (stained) foraminifera from the Mozambique Channel (eastern Africa): multispecies signatures and paleoenvironmental application

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorFONTANIER, Christophe
dc.contributor.authorSAKAI, Saburo
dc.contributor.authorTOYOFUKU, Takashi
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGARNIER, Eline
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorBRANDILY, Christophe
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorEUGENE, Thibaut
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDEFLANDRE, Bruno
IDREF: 170923509
dc.date.accessioned2024-05-29T11:31:00Z
dc.date.available2024-05-29T11:31:00Z
dc.date.issued2017-04
dc.identifier.issn0916-8370en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/200132
dc.description.abstractEnOxygen and carbon isotopes (δ18O and δ13C) have been investigated in carbonate tests of deep-sea foraminifera living in the Mozambique Channel (eastern Africa) to understand how environmental constraints (e.g., organic matter, oxygenation) control the intra- and interspecific variability of isotopic signatures. 197 living individuals, including eight different species, from various microhabitats within the sediment were sorted from sediment samples gathered at two stations on the Malagasy upper slope. Results show that the δ18O values of foraminiferal taxa were not controlled by microhabitat pattern. They presented tremendous and intriguing intraspecific variability that is not explained by the classical ontogenetic effect. The δ13C values of infaunal foraminiferal taxa do not show a 1:1 relationship with the bottom water δ13C DIC and do not present a constant offset from it; instead, they appear to be mainly controlled by a microhabitat effect. The lower δ13C values of shallow, intermediate, and deep infaunal taxa at the deeper station compared to those seen at the shallower station reflect the enhanced exportation of sedimentary organic matter at the sediment–water interface, and its related mineralization within the upper sediments. The ∆δ13C between shallow/very shallow infaunal species (i.e., Hoeglundina elegans, Uvigerina hispida) and intermediate/deep infaunal species (i.e., Melonis barleeanus, Globobulimina barbata) permits insight into (1) the exportation of organic matter to the seafloor and (2) the various degradation pathways for organic detritus in the benthic environments off NW Madagascar.
dc.language.isoENen_US
dc.title.enStable isotopes in deep-sea living (stained) foraminifera from the Mozambique Channel (eastern Africa): multispecies signatures and paleoenvironmental application
dc.typeArticle de revueen_US
dc.identifier.doi10.1007/s10872-016-0401-1en_US
dc.subject.halPlanète et Univers [physics]en_US
dc.subject.halSciences du Vivant [q-bio]en_US
bordeaux.journalJournal of Oceanographyen_US
bordeaux.page259-275en_US
bordeaux.volume73en_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.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-04201762
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=Journal%20of%20Oceanography&rft.date=2017-04&rft.volume=73&rft.issue=2&rft.spage=259-275&rft.epage=259-275&rft.eissn=0916-8370&rft.issn=0916-8370&rft.au=FONTANIER,%20Christophe&SAKAI,%20Saburo&TOYOFUKU,%20Takashi&GARNIER,%20Eline&BRANDILY,%20Christophe&rft.genre=article


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