Influence of a hydroelectric dam on fish mercury contamination along the Sinnamary River (French Guiana)

被引：1

作者：

Maury-Brachet, Regine ^{[1
]}

Dassie, Emilie P. ^{[1
]}

Legeay, Alexia ^{[1
]}

Gonzalez, Patrice ^{[1
]}

Feurtet-Mazel, Agnes ^{[1
]}

Gourand, Francois ^{[2
]}

Dominique, Yannick ^{[3
]}

Vigouroux, Regis ^{[4
]}

机构：

[1] Univ Bordeaux, CNRS, Bordeaux INP, EPOC,UMR 5805, F-33600 Pessac, France

[2] Meteo France, Paris, France

[3] BioeKo, Noumea, Nouvelle Caledo, France

[4] HYDRECo, Kourou, French Guiana, France

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2024年 / 269卷

关键词：

Mercury contamination; Tropical fish; Dam impoundment; French Guiana; Human health; PETIT-SAUT RESERVOIR; HUMAN EXPOSURE; ACCUMULATION; BACTERIA; WATER;

D O I：

10.1016/j.ecoenv.2023.115771

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页数：10

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