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Spatial distribution of living (Rose Bengal stained) benthic foraminifera in the Loire estuary (western France)

dc.rights.licenseopenen_US
hal.structure.identifierBio-Indicateurs Actuels et Fossiles [BIAF]
dc.contributor.authorMOJTAHID, Meryem
hal.structure.identifierBio-Indicateurs Actuels et Fossiles [BIAF]
dc.contributor.authorGESLIN, Emmanuelle
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCOYNEL, Alexandra
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGORSE, Laureline
dc.contributor.authorVELLA, Claude
hal.structure.identifierLittoral, Environnement, Télédétection, Géomatique [LETG-Angers]
dc.contributor.authorDAVRANCHE, Aurélie
hal.structure.identifierBio-Indicateurs Actuels et Fossiles [BIAF]
dc.contributor.authorZOZZOLO, L.
hal.structure.identifierBio-Indicateurs Actuels et Fossiles [BIAF]
dc.contributor.authorBLANCHET, L.
hal.structure.identifierBio-Indicateurs Actuels et Fossiles [BIAF]
dc.contributor.authorBÉNÉTEAU, E.
hal.structure.identifierBio-Indicateurs Actuels et Fossiles [BIAF]
dc.contributor.authorMAILLET, Gregoire
dc.date.accessioned2024-10-01T10:52:58Z
dc.date.available2024-10-01T10:52:58Z
dc.date.issued2016
dc.identifier.issn1385-1101en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/202086
dc.description.abstractEnNinety-seven surface sediment samples were collected in September 2012 from intertidal and subtidal areas along the Loire estuary (western France). The main objective of this work is to study the spatial distributional patterns of living benthic foraminifera and their link to the environmental parameters (distance to sea, elevation, grain size, total organic carbon, trace metals, sedimentary carbonates, and polycyclic aromatic hydrocarbons) in the Loire estuary. Foraminiferal analysis was also extended to the dead assemblages in thirty-three surface samples from the lower inner estuary. The highest absolute densities of living benthic foraminifera are found in the lower inner estuary within the polyhaline domain. This is attributed to the presence of mudflats with abundant food source, i.e. microphytobenthos. The low densities found in the outer estuary (euhaline domain) are attributed partly to the sandy nature of the sediments and the food source inhabiting this substrate. The near absence of foraminifera in the inner estuary (mesohaline and polyhaline domains) is inferred to the physical disturbance resulting from the regular dredging of the navigation channel. The living assemblages are dominated by three typical estuarine species: Ammonia tepida and Haynesina germanica in the intertidal mudflats of the lower inner estuary and Cribroelphidium excavatum in the sandy subtidal sediments of the lower inner and outer estuary. In the Loire estuary, H. germanica has an unusual intermediate geographical distribution along the estuary between A. tepida and C. excavatum while in most temperate estuaries this species is present upstream in the mesohaline domain. This is most likely the result of the regular dredging of the navigation channel damaging its natural habitat. This might be also the explanation for the total absence of agglutinated species usually dominating the oligohaline domain. The canonical correspondence analysis shows that elevation (and its link to time of emersion), distance to sea (and its correspondence with salinity), and organic carbon content appear to be the primary drivers of foraminiferal distribution. The present study provides for the first time ecological and distribution patterns of living benthic foraminiferal communities in the Loire estuary. This baseline knowledge is necessary for the future studies focusing on the use of benthic foraminifera as bio-indicators in the Loire estuary and in transitional environments in general.
dc.language.isoENen_US
dc.subject.enbenthic foraminifera
dc.subject.enBio-indicators
dc.subject.enDistance to sea
dc.subject.enElevation
dc.subject.enFood source
dc.subject.enLoire estuary
dc.title.enSpatial distribution of living (Rose Bengal stained) benthic foraminifera in the Loire estuary (western France)
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.seares.2016.02.003en_US
dc.subject.halSciences du Vivant [q-bio]en_US
bordeaux.journalJournal of Sea Research (JSR)en_US
bordeaux.page1-16en_US
bordeaux.volume118en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamTGMen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-01420554
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
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