Cascade reservoirs affect mercury concentrations in fish from Teles Pires river, Brazilian Amazon

被引：3
作者：
Oliveira, Edvagner [1 ]
Kasper, Daniele [2 ]
da Silva, Solange Aparecida Arrolho [3 ]
Lazaro, Wilkinson Lopes [1 ]
Muniz, Claumir Cesar [1 ]
de Carvalho, Giovani Spinola [1 ]
Borges, Fernando Vieira [1 ]
Pimenta, Adriano Luiz [3 ]
Hurtado, Thaysa Costa [1 ]
Ignacio, aurea Regina Alves [1 ]
机构：
[1] Univ Estado Mato Grosso, Ctr Pesquisa Limnol Biodiversidade & Etnobiol Pant, Programa Pos Graduacao Ciencias Ambientais, Caceres, Mato Grosso, Brazil
[2] Univ Fed Minas Gerais, Inst Ciencias Biol, Belo Horizonte, Minas Gerais, Brazil
[3] Univ Estado Mato Grosso, Programa Mestrado Profiss Rede Nacl Gestao & Regul, Alta Floresta, Mato Grosso, Brazil
来源：
ECOTOXICOLOGY | 2025年 / 34卷 / 03期
关键词：
Bioaccumulation; Amazon; Total Mercury; Tropical fish; HYDROELECTRIC RESERVOIR; WATER; METHYLMERCURY; DOWNSTREAM; BASIN; METHYLATION; BIOACCUMULATION; FLOODPLAIN; PLANKTON; EXPORT;
D O I：
10.1007/s10646-024-02847-8
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Hydroelectric reservoirs favor mercury contamination in biota, but the contamination in cascade reservoirs is not yet clear. We investigated total mercury (THg) contamination in fish in four cascade reservoirs in the Brazilian Amazon between August 2022 and April 2023. Overall, downstream predatory fish showed higher mercury concentrations than those upstream. Mercury concentrations in predatory fish collected upstream increased in the reservoirs along the river. Downstream, these concentrations were consistently high, with no variation between reservoirs. Non-predatory fish did not exhibit a clear spatial trend in mercury concentrations. Considering that the synergistic effect of cascade reservoirs was evident in predatory fish, and that the species Serrasalmus rhombeus is widely distributed and important for regional fishing, we suggest it as a target species for future studies on thi issue in the region.
引用
收藏
页码：444 / 455
页数：12
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