Low mercury levels in marine fish from estuarine and coastal environments in southern China

被引:32
作者
Pan, Ke [1 ]
Chan, Heidi [1 ]
Tam, Yin Ki [1 ]
Wang, Wen-Xiong [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Div Life Sci, Kowloon, Hong Kong, Peoples R China
关键词
Mercury; Fish; Stable isotopes; Biomagnification; PEARL RIVER ESTUARY; FOOD-WEB; HONG-KONG; TROPHIC POSITION; STABLE ISOTOPES; ORGANIC-CARBON; HUMAN EXPOSURE; EAST-AFRICA; METHYLMERCURY; SEDIMENTS;
D O I
10.1016/j.envpol.2013.11.004
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study is the first comprehensive evaluation of total Hg and methylmercury (MeHg) concentrations in wild marine fish from an estuarine and a coastal ecosystem in southern China. A total of 571 fish from 54 different species were examined. Our results showed that the Hg levels were generally low in the fish, and the Hg levels were below 30 ng g(-1) (wet weight) for 82% of the samples, which may be related to the reduced size of the fish and altered food web structure due to overfishing. Decreased coastal wetland coverage and different carbon sources may be responsible for the habitat-specific Hg concentrations. The degree of biomagnification was relatively low in the two systems. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:250 / 257
页数:8
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