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Impacts antagonistes des espèces bioturbatrices benthiques : Effets interconnectés sur les propriétés sédimentaires, les variables biogéochimiques et la dynamique microbienne

dc.rights.licenseopenen_US
dc.contributor.authorMORELLE, J.
dc.contributor.authorHUGUET, A.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorRICHARD, Anais
dc.contributor.authorLAVERMAN, A. M.
dc.contributor.authorROOSE-AMSALEG, C.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPARLANTI, Edith
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSOURZAC, Mahaut
dc.contributor.authorMESNAGE, V.
dc.contributor.authorLECOQ, N.
dc.contributor.authorDELOFFRE, J.
dc.contributor.authorVIOLLIER, E.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMAIRE, Olivier
IDREF: 111161525
dc.contributor.authorORVAIN, F.
dc.date.accessioned2024-03-07T13:46:21Z
dc.date.available2024-03-07T13:46:21Z
dc.date.issued2024-04-01
dc.identifier.issn0022-0981en_US
dc.identifier.urioai:crossref.org:10.1016/j.jembe.2024.152000
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188630
dc.description.abstractEnMacrofaunal species inhabiting intertidal mudflats and performing intense bioturbation are considered as ecosystem engineers, since they profoundly influence their physical, chemical, and biological environments. Nowadays, to complete our knowledge on the effect of bioturbation processes on the surrounding environment, interdisciplinary approach is essential to unravel their complex intertwined effects on intertidal mudflats. In this study, the effects of bioturbators on sediment properties, biogeochemical variables, and microbial dynamics (microphytobenthos, bacteria and archaea) were investigated. To this end, manipulation experiments were carried out in an intertidal mudflat of the Seine Estuary (France) by revamped the abundance of the two dominant bioturbators, Scrobicularia plana and Hediste diversicolor, in winter and late summer. Results showed that the presence of H. diversicolor in winter had a significant effect, with a significant increase in bed level accretion and microbial nitrate reduction rates. In contrast, the presence of S. plana showed no significant impact on sediment properties, most likely due to a reduced bioturbating activity at low temperature. In summer, both ecosystem engineers strongly influenced their surrounding environment but with opposite effects. The intense reworking of the sediment surface by S. plana limited microbial growth and enhanced erosion processes. Conversely, the presence of H. diversicolor favoured sediment accretion and enhanced microbial growth. Overall, this interdisciplinary study confirms the importance of these two ecosystem engineers in temperate estuarine mudflats by highlighting their simultaneous and intertwined effects on the sedimentary, physicochemical, and biological features. This confirms the importance of actively considering ecosystem engineers when restoring the natural habitats of tidal flats to cope with the different vulnerability risks related to global warming (sandification of estuarine sediments, disappearance of productive mudflats, sea level rise, vulnerability to storms and erosion).
dc.language.isoENen_US
dc.sourcecrossref
dc.subject.enbiogeochemical cycles
dc.subject.enecosystem engineers
dc.subject.enmicrobial communities
dc.subject.enmicrophytobenthos
dc.subject.enorganic 39 matter
dc.subject.ensediment
dc.titleImpacts antagonistes des espèces bioturbatrices benthiques : Effets interconnectés sur les propriétés sédimentaires, les variables biogéochimiques et la dynamique microbienne
dc.title.enAntagonistic impacts of benthic bioturbator species: Interconnected effects on sedimentary properties, biogeochemical variables, and microbial dynamics
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.jembe.2024.152000en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalJournal of Experimental Marine Biology and Ecologyen_US
bordeaux.page152000en_US
bordeaux.volume573en_US
bordeaux.hal.laboratoriesEPOCen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamLPTCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
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