生态学杂志2013，Vol.32Issue(7)：1870-1876,7.
三峡库区蓄水初期大宁河鱼类重金属污染特征
Characteristics of heavy metals pollution of fishes in Daning River of Three Gorges Reservoir Area during initial impoundment
摘要
Abstract
There exists spatial heterogeneity in the water environment in different areas of the Three Gorges Reservoir Area (TGRA) after impoundment.In order to explore the effects of different water environmental conditions on the heavy metals concentrations in the fishes in TGRA,we selected the river mouth (Wushan) and backwater area (Dachang) of Daning River,a typical tributary in central TGRA,as the study areas.Eleven fish species were collected from each of the two sites,and the Cr,Cd,As,Pb,Ni,Cu and Zn concentrations in the muscle tissue of all fish samples were determined.The food sources and nutrition levels of the fish samples were evaluated by using stable isotope analysis (δ13C and δ15N).It was found that the fishes in Dachang had greater range of δ13C values (-28.8‰--22.5‰) than those in Wushan (-26.2‰--23.1‰),while the δ15N values of the fishes in Dachang were lower than those in Wushan.There were no significant differences in the heavy metal concentrations in the fishes in Dachang and Wushan,but the heavy metal concentrations in demersal fishes in Dachang were significantly higher than those in corresponding species in Wushan.As compared with other fishes,the demersal fishes in backwater water area had more contact with sediments,which could be an important reason for the higher heavy metal levels in the demersal fish tissues.关键词
三峡库区/大宁河/鱼类/重金属/稳定同位素Key words
Three Gorges Reservoir Area/ Daning River/ fish/ heavy metal/ stable isotope分类
资源环境引用本文复制引用
余杨,王雨春,周怀东,高博,赵高峰..三峡库区蓄水初期大宁河鱼类重金属污染特征[J].生态学杂志,2013,32(7):1870-1876,7.基金项目
国家自然科学基金项目(51179205)、国家水体污染控制与治理科技重大专项(2009ZX07104-001)和中国水利水电科学研究院专项(环集1339)资助. （51179205）
