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Bi-decadal changes in nutrient concentrations and ratios in marine coastal ecosystems: The case of the Arcachon bay, France

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorLHEUREUX, Arnaud
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDAVID, Valerie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDEL AMO, Yolanda
dc.contributor.authorSOUDANT, Dominique
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorAUBY, Isabelle
dc.contributor.authorGANTHY, Florian
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBLANCHET, Hugues
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCORDIER, Marie-Ange
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCOSTES, Laurent
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFERREIRA, Stephan
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMORNET, Line
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorNOWACZYK, Antoine
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPARRA, M.
dc.contributor.authorD'AMICO, Florence
dc.contributor.authorGOURIOU, Laure
dc.contributor.authorMETEIGNER, Claire
hal.structure.identifierInstitut Français de Recherche pour l'Exploitation de la Mer [IFREMER]
dc.contributor.authorOGER-JEANNERET, Helene
dc.contributor.authorRIGOUIN, Loic
dc.contributor.authorPERRIERE-RUMEBE, Myriam
dc.contributor.authorTOURNAIRE, Marie-Pierre
dc.contributor.authorTRUT, Florence
dc.contributor.authorTRUT, Gilles
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSAVOYE, Nicolas
ORCID: 0000-0001-6433-8519
IDREF: 067128637
dc.date.accessioned2023-11-08T14:08:03Z
dc.date.available2023-11-08T14:08:03Z
dc.date.issued2022-02-01
dc.identifier.issn0079-6611en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/184687
dc.description.abstractEnLarge amounts of nutrients have been released to the coastal ecosystems during the 20th century. Since then, management policies have been implemented and these amounts decreased in the economically developed countries. We examined the bi-decadal changes in nutrients (nitrate + nitrite, ammonium, orthophosphate and silicic acid) in the Arcachon bay, a semi-enclosed lagoon that hosts one of the largest but declining seagrass meadow in Europe. Seven sites have been sampled for nutrients and biogeochemical parameters during twenty years at low and/or high tide. In addition, continental and climatic data as well as hydro-climatic indices were used. Dynamic linear models were used to assess the bi-decadal changes in nutrient concentrations and ratios, their seasonality, and the bi-decadal changes of their potential drivers. Partial least square path modeling were used to investigate the relationships between potential abiotic drivers and nutrients. During the study period, the concentration of N and Si nutrients increased whereas the concentration of orthophosphate decreased, leading to deep changes in nutrient ratios. Clear relationships between abiotic drivers (local climate, continental inputs and the bay hydrodynamism) and N, P and Si nutrients were highlighted. However, the bi-decadal change in nutrient concentrations and ratios was mainly ascribed to the seagrass meadow decline through direct (less nutrient consumption) and indirect (increase in phytoplankton biomass) processes. Changes in temperature and wind direction may also influenced the nutrients concentrations through processes of remineralisation and flushing time, respectively. This study illustrates (1) the top-down control of seagrass on the nutrients concentrations and stoichiometry, and (2) the competition between primary producers (seagrass vs phytoplankton) for their nutrients resource.
dc.language.isoENen_US
dc.title.enBi-decadal changes in nutrient concentrations and ratios in marine coastal ecosystems: The case of the Arcachon bay, France
dc.title.alternativeProgress in Oceanographyen_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.pocean.2022.102740en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalProgress in Oceanographyen_US
bordeaux.volume201en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamECOBIOCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Progress%20in%20Oceanography&rft.date=2022-02-01&rft.volume=201&rft.eissn=0079-6611&rft.issn=0079-6611&rft.au=LHEUREUX,%20Arnaud&DAVID,%20Valerie&DEL%20AMO,%20Yolanda&SOUDANT,%20Dominique&AUBY,%20Isabelle&rft.genre=article


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