Contamination by Metals and Pharmaceuticals in Northern Taihu Lake (China) and Its Relation to Integrated Biomarker Response in Fish

Overview

Journal Ecotoxicology

Specialties Environmental Health
Toxicology

Date 2012 Oct 12

PMID 23053787

Citations 5

Authors

Guanghua Lu

Xiaofan Yang

Zhihua Li

Haizhou Zhao

Chao Wang

Affiliations

Soon will be listed here.

Abstract

Taihu Lake is the largest shallow freshwater lake in eastern China and is suffering not only from an increasingly serious threat of eutrophication but also potential ecological risk due to the input of emerging contaminants. Active biomonitoring was conducted in Taihu Lake using transplanted goldfish (Carassius auratus) to determine the contamination by pharmaceuticals and metals and to assess the potential ecological risk. A suite of biomarkers including acetylcholinesterase, ethoxyresorufin O-deethylase, glutathione S-transferase, glutathione peroxidase and superoxide dismutase activities in fish after 7, 14, 21 and 28 days of exposure in situ, as well as pharmaceuticals and metals in water, were determined during the field exposure period. The results indicate that pharmaceuticals exist mainly in Zhushan Bay and Meiliang Bay, while metals are present mainly in Gong Bay. An integrated biomarker response (IBR) was calculated and used to evaluate the ecological risk of the polluted area of Taihu Lake. It was found that Zhushan Bay might present higher risk to fish, followed by Meiliang Bay. IBR values were in good agreement with copper and caffeine concentrations.

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