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Ecological risk assessment of heavy metals in fish from the Dianchi Lake, China using the integrated biomarker response approach

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Abstract

This study used the integrated biomarker response (IBR) index approach to assess the ecological risks of heavy metals in different regions of Dianchi Lake, combined with active monitoring and passive monitoring. The contents of five heavy metals (Cu, As, Cd, Hg, and Pb) and six biomarkers (acetylcholinesterase, sodium-potassium ATPase, metallothionein, superoxide dismutase, glutathione peroxidase, and malondialdehyde) in the muscles of crucians (Carassius auratus) were measured to calculate the IBR value. The results indicate that the contents of heavy metal in the fish under active monitoring and passive monitoring were rather low and did not exceed the National Food Safety Standards of China. The IBR value of day 14 of active monitoring correlated with the heavy metal Cd content in the fish, suggesting a potential risk of Cd pollution in the aquatic environment of Dianchi Lake. The IBR values obtained for different regions of the lake on day 14 can be arranged in the following order: West S3 (9.24) > East S1 (3.97) > South S2 (2.39) > North S4 (0.36). These results suggest a potential risk of heavy metal contamination in the western part of Dianchi Lake.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 21567029).

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Correspondence to Li Qiang Chen.

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Gao, Y., Fang, L., Xiang, Q.Q. et al. Ecological risk assessment of heavy metals in fish from the Dianchi Lake, China using the integrated biomarker response approach. Environ Sci Pollut Res 27, 45712–45721 (2020). https://doi.org/10.1007/s11356-020-10434-7

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  • DOI: https://doi.org/10.1007/s11356-020-10434-7

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