ABDOU, Melina; ZALDIBAR, Beñat; MEDRANO, Rebeca; SCHAFER, Jorg; IZAGIRRE, Urtzi; DUTRUCH, Lionel; COYNEL, Alexandra; BLANC, Gérard; SOTO, Manu

doi:10.1007/s11356-018-3443-7

Environnements et Paléoenvironnements OCéaniques [EPOC]

ZALDIBAR, Beñat
Universidad del País Vasco [Espainia] / Euskal Herriko Unibertsitatea [España] = University of the Basque Country [Spain] = Université du pays basque [Espagne] [UPV / EHU]

MEDRANO, Rebeca
Universidad del País Vasco [Espainia] / Euskal Herriko Unibertsitatea [España] = University of the Basque Country [Spain] = Université du pays basque [Espagne] [UPV / EHU]

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Environmental Science and Pollution Research. 2020, vol. 27, n° 4, p. 3584-3599

Résumé en anglais

Platinum (Pt) is a technology critical element (TCE) for which biogeochemical cycles are still poorly understood. This lack of knowledge includes Pt effects on marine organisms, which proved to be able to bioconcentrate this trace element. Oysters Crassostrea gigas were exposed to stable Pt isotope spiked daily in seawater for 35 days. Seawater was renewed daily and spiked (with Pt(IV)) to three nominal Pt concentrations (50, 100, and 10,000 ng L−1) for two replicate series. Organotropism study revealed that gills, and to a lesser extent mantle, are the key organs regarding Pt accumulation, although a time- and concentration-dependent linear increase in Pt levels occurred in all the organs investigated (i.e., digestive gland, gonads, gills, mantle, and muscle). In oysters exposed to Pt concentrations of 10,000 ng L−1, significant biomarker impairments occurred, especially at cellular levels. They reflect altered lipofuscin and neutral lipid contents, as well as intralysosomal metal accumulation. These observations were attributed to activation of excretion/detoxification mechanisms, including Pt elimination through feces and clearly support the importance of the digestive gland in the response to direct Pt exposure. Despite relatively constant condition index, the integrative biological response (IBR) index suggests a generally decreasing health status of oysters< Réduire

Mots clés en anglais

Platinum

Emerging Contaminant

Isotopes

Marine Bivalve

Biomarker

Ecotoxicology

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https://oskar-bordeaux.fr/handle/20.500.12278/187311

DOI

http://dx.doi.org/10.1007/s11356-018-3443-7

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Organotropism and biomarker response in oyster Crassostrea gigas exposed to platinum in seawater

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