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Manganese incorporation in living (stained) benthic foraminiferal shells: a bathymetric and in-sediment study in the Gulf of Lions (NW Mediterranean)

dc.rights.licenseopenen_US
dc.contributor.authorFHLAITHEARTA, Shauna
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
hal.structure.identifierLaboratoire de Planétologie et Géodynamique - Angers [LPG-ANGERS]
dc.contributor.authorFONTANIER, Christophe
hal.structure.identifierLaboratoire de Planétologie et Géodynamique - Angers [LPG-ANGERS]
dc.contributor.authorJORISSEN, Frans
hal.structure.identifierLaboratoire de Planétologie et Géodynamique - Angers [LPG-ANGERS]
dc.contributor.authorMOURET, Aurélia
dc.contributor.authorDUEÑAS-BOHÓRQUEZ, Adriana
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorANSCHUTZ, Pierre
ORCID: 0000-0001-5331-7974
IDREF: 076300331
dc.contributor.authorFRICKER, Mattias
hal.structure.identifierLaboratory of Inorganic Chemistry
dc.contributor.authorGÜNTHER, Detlef
hal.structure.identifierFaculty of Geosciences, Utrecht University
dc.contributor.authorDE LANGE, Gert
dc.contributor.authorREICHART, Gert-Jan
dc.date.accessioned2024-05-06T10:08:29Z
dc.date.available2024-05-06T10:08:29Z
dc.date.issued2018
dc.identifier.issn1726-4170en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199650
dc.description.abstractEnManganese geochemistry in deep-sea sediments is known to vary greatly over the first few centimeters, which overlaps the in-sediment depth habitats of several benthic foraminiferal species. Here we investigated manganese incorporation in benthic foraminiferal shell carbonate across a six-station depth transect in the Gulf of Lions, NW Mediterranean, to unravel the impacts of foraminiferal ecology and Mn pore water geochemistry. Over this transect water depth increases from 350 to 1987m, while temperature ( ∼ 13°C) and salinity ( ∼ 38.5) remained relatively constant. Manganese concentrations in the tests of living (rose bengal stained) benthic foraminiferal specimens of Hoeglundina elegans, Melonis barleeanus, Uvigerina mediterranea, and Uvigerina peregrina were measured using laser ablation inductively coupled mass spectrometry (laser ablation ICP-MS). Pore water manganese concentrations show a decrease from shallow to deeper waters, which corresponds to a generally decreasing organic-matter flux with water depth. Differences in organic-matter loading at the sediment–water interface affects oxygen penetration depth into the sediment and hence Mn pore water profiles. Mn∕Ca values for the investigated foraminiferal species reflect pore water geochemistry and species-specific microhabitat in the sediment. The observed degree of variability within a single species is in line with known ranges in depth habitat and gradients in redox conditions. Both the Mn∕Ca ratio and interspecific variability hence reflect past Mn cycling and related early diagenetic processes within the sediment, making this a potential tool for bottom-water oxygenation and organic-matter fluxes. Dynamics of both in-sediment foraminiferal depth habitats and Mn cycling, however, limit the application of such a proxy to settings with relatively stable environmental conditions.
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.title.enManganese incorporation in living (stained) benthic foraminiferal shells: a bathymetric and in-sediment study in the Gulf of Lions (NW Mediterranean)
dc.typeArticle de revueen_US
dc.identifier.doi10.5194/bg-15-6315-2018en_US
dc.subject.halPlanète et Univers [physics]en_US
bordeaux.journalBiogeosciencesen_US
bordeaux.page6315-6328en_US
bordeaux.volume15en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue20en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamECOBIOCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02872445
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=Biogeosciences&rft.date=2018&rft.volume=15&rft.issue=20&rft.spage=6315-6328&rft.epage=6315-6328&rft.eissn=1726-4170&rft.issn=1726-4170&rft.au=FHLAITHEARTA,%20Shauna&FONTANIER,%20Christophe&JORISSEN,%20Frans&MOURET,%20Aur%C3%A9lia&DUE%C3%91AS-BOH%C3%93RQUEZ,%20Adriana&rft.genre=article


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