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Isotopic and biochemical trophic markers reveal the complexity of interactions at the base of pelagic food webs (Mediterranean sea).

dc.rights.licenseopenen_US
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorCHEN, Chia-Ting
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorCARLOTTI, François
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorHARMELIN-VIVIEN, Mireille
hal.structure.identifierEcologie marine tropicale des océans Pacifique et Indien [ENTROPIE [Nouvelle-Calédonie]]
dc.contributor.authorLETOURNEUR, Yves
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSAVOYE, Nicolas
ORCID: 0000-0001-6433-8519
IDREF: 067128637
hal.structure.identifierLIttoral ENvironnement et Sociétés [LIENSs]
dc.contributor.authorGUILLOU, Gaël
dc.contributor.authorLEBRETON, Benoit
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorTESÁN-ONRUBIA, Javier
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorBARANI, Aude
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorCORNET, Véronique
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorGUILLOUX, Loïc
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorESPOSITO, Anaïs
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorRÉ, Christian
hal.structure.identifierInstitut méditerranéen d'océanologie [MIO]
dc.contributor.authorBĂNARU, Daniela
dc.date.accessioned2024-02-05T10:40:51Z
dc.date.available2024-02-05T10:40:51Z
dc.date.issued2023-09
dc.identifier.issn0141-1136en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/187797
dc.description.abstractEnTo gain insight into the impact of bottom-up changes in the plankton community on planktivorous fish in the context of the decline of small pelagic fisheries in the Northwestern Mediterranean Sea, we have conducted an extensive year-long study. The investigation combined biochemical analyses (proteins, carbohydrates, and lipids) with C and N stable isotope analyses (SIA) to simultaneously study phytoplankton, zooplankton, and eight planktivorous fish species (Engraulis encrasicolus, Sardina pilchardus, Sardinella aurita, Sprattus sprattus, Cepola macrophthalma, Chromis chromis, Boops boops, and Spicara maena). This study is the first to analyze both stable isotope and biochemical compositions in coastal particulate organic matter (POM) size classes (0.7-2.7 μm, 2.7-20 μm, and 20-200 μm), zooplankton size classes (200-300 μm, 300-500 μm, 500-1000 μm, 1000-2000 μm, and >2000 μm), and taxonomic groups. We demonstrated that: (1) POM stable isotope compositions varied based on its spatial origin, the taxonomic composition of its biota, and its biochemical content; (2) δ15N values increased with zooplankton size classes and groups, indicating different trophic levels; (3) Phytoplankton exhibited a lipid-rich composition (∼55%), while zooplankton and fish muscles were protein-rich (∼61% and ∼66%, respectively). Bayesian stable isotope mixing models revealed that, on average: (1) POM from oceanic waters contributed the most to the POM in the bay (>51%), with a dominance of pico-POM (∼43%); (2) The 200-1000 μm zooplankton primarily consumed nano-POM, the 1000-2000 μm zooplankton mostly consumed micro-POM (∼64%), and the >2000 μm zooplankton also mostly consumed micro-POM; (3) Mesozooplankton (200-2000 μm) constituted the main portion (∼42%) of the diet for planktivorous fish species, while macrozooplankton organisms (>2000 μm) were the primary food resource (∼43%) for both B. boops and S. sprattus. Our study underscores the complexity of the pelagic food web and highlights the bottom-up transfer of organic matter from the smallest phytoplankton size fractions to planktivorous fish.
dc.description.sponsorshipPlancton: pompe biologique de contaminants dans les écosystèmes marins (CONTAMPUMP)? - ANR-19-CE34-0001en_US
dc.language.isoENen_US
dc.subject.enSmall pelagic fish
dc.subject.enplankton
dc.subject.encarbon and nitrogen stable isotopes
dc.subject.enbiochemical composition
dc.subject.enorganic matter transfer
dc.subject.enmixing model
dc.title.enIsotopic and biochemical trophic markers reveal the complexity of interactions at the base of pelagic food webs (Mediterranean sea).
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.marenvres.2023.106123en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalMarine Environmental Researchen_US
bordeaux.page106123en_US
bordeaux.volume190en_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
bordeaux.import.sourcehal
hal.identifierhal-04185071
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
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