Sun Zhan-dong

The heavy metal content in organisms at Lake Dongting and its ecological assessment

Based on the monitoring data obtained from Lake Dongting in November 2005,the concentrations of the heavy metals in water and organisms were analyzed,and the pollution assessment of heavy metals in organisms was made.The results showed that the concentrations ot heavy metals in water were lower than Type I of the Peoples Republic of China,the concentrations of heavy metals in Penaeus vannamei Booen were higher than in Bellamya quadrata and in fish,and the concentrations of heavy metals in demersal fish were higher than that in pelagic fish, and the concentrations of heavy metals in predatory fish were higher than that in herbivorous fishes.In Lake Dongting,the pollution indexes of Cd,Pb,As in Penaeus vannamei were higher than that in Bellamya quadrata, and higher than that in fishes;the pollution indexes of Hg in fish were higher than that in Bellamya quadrata,and in Penaeus vannamei.