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Influence of a hydroelectric dam on fish mercury contamination along the Sinnamary River (French Guiana).
Maury-Brachet, Régine; Dassié, Émilie P; Legeay, Alexia; Gonzalez, Patrice; Feurtet-Mazel, Agnès; Gourand, François; Dominique, Yannick; Vigouroux, Régis.
Afiliación
  • Maury-Brachet R; Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France.
  • Dassié ÉP; Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France. Electronic address: emilie.dassie@u-bordeaux.fr.
  • Legeay A; Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France.
  • Gonzalez P; Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France.
  • Feurtet-Mazel A; Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France.
  • Gourand F; Météo France, France.
  • Dominique Y; BioeKo, Nouméa, Nouvelle Calédonie, France.
  • Vigouroux R; HYDRECO, Kourou, French Guiana, France.
Ecotoxicol Environ Saf ; 269: 115771, 2024 Jan 01.
Article en En | MEDLINE | ID: mdl-38100848
ABSTRACT
The Petit Saut hydroelectric dam and the upstream and downstream areas of the Sinnamary River in French Guiana (Amazon basin) have been studied from 1993 to 2020. The nearly thirty-years-long study of the monitoring of total mercury concentration in fish and the physicochemical survey of the environment made it possible to demonstrate the impact of the flooding of the forest and the role of the hydroelectric dam on the methylation of mercury. Results show that the physicochemical modifications generated by the construction of the dam led to a significant production of methylmercury (MeHg) in the anoxic part of the reservoir and downstream of the river leading to a strong spatio-temporal impact of the dam. Seven species of fishes are studied and their mercury concentrations vary according to many parameters fish diet, position in the water column, site, lake oxycline level and time.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Mercurio / Compuestos de Metilmercurio Límite: Animals País/Región como asunto: America do sul / Caribe ingles / Guyana / Guyana francesa Idioma: En Revista: Ecotoxicol Environ Saf Año: 2024 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Mercurio / Compuestos de Metilmercurio Límite: Animals País/Región como asunto: America do sul / Caribe ingles / Guyana / Guyana francesa Idioma: En Revista: Ecotoxicol Environ Saf Año: 2024 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Países Bajos