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Distribution, bioaccumulation and trophic transfer of trace metals in the food web of Chaohu Lake, Anhui, China

文献类型： 外文期刊

作者： Fang, Ting 1 ; Lu, Wenxuan 1 ; Cui, Kai 1 ; Li, Jing 1 ; Yang, Kun 1 ; Zhao, Xiuxia 1 ; Liang, Yangyang 1 ; Li, Hui 2 ;

作者机构： 1.Anhui Acad Agr Sci, Fisheries Res Inst, Key Lab Freshwater Aquaculture & Enhancement Anhu, Hefei 230001, Anhui, Peoples R China

2.Anhui Agr Univ, Sch Resources & Environm, Hefei 230001, Anhui, Peoples R China

关键词： Trace metals; Bioaccumulation; Trophic transfer; Aquatic food web; Risk assessment; Chaohu lake

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2019 年 218 卷

页码：

收录情况： SCI

摘要： Chaohu Lake is one of the five largest freshwater lakes in China situated in Anhui Province. Water, sediment and aquatic organisms were collected from Chaohu Lake. Trace metals were measured to investigate their bioaccumulation pattern and trophic transfer in the food web as well as potential health risk assessment through fish consumption. Trophic interactions were investigated by stable nitrogen isotope. Linear regression of log metal concentration versus delta N-15 was used to determine whether there is biomagnification or biodilution. Results showed that concentrations of trace metals in water were rather low except Hg, some of which surpassed the scope of quality standard. Trace metals in sediment exceeded background values nevertheless within the range for the protection of aquatic life. Therein, geochemical fractionation showed that Cd would pose a considerable potential ecological risk. Trace metals were higher in plankton except for Cu and Zn was higher in shrimp due to metabolic needs. Decreasing trend was observed in Pb, Cr, Cd, As and Hg levels with increasing trophic level whereas increasing trend was observed in Zn. Trace metals in fish were lower than legislation thresholds except for Cr in two samples that exceeded the threshold value. Nonetheless, total target hazard quotient values and target cancer risk were lower than unit and within acceptable range, indicating there was no health risk for inhabitants from trace metals through fish consumption. (C) 2018 Elsevier Ltd. All rights reserved.

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