贡湖湾大型底栖动物碳、氮稳定同位素的空间分布特征  

Spatial Distribution Characteristics of Stable Carbon and Nitrogen Isotope in Macrobenthos in the Gonghu Bay

作　　者：张雷燕[1,2] 安浩[2,3] 关保华[4] 程寒飞[2] 詹茂华[1,2] 

机构地区：[1]中冶华天(安徽)节能环保研究院有限公司,安徽马鞍山243099 [2]中冶华天工程技术有限公司,江苏南京210019 [3]南京大学环境学院污染控制与资源化研究国家重点实验室,江苏南京210046 [4]中国科学院南京地理与湖泊研究所湖泊科学与环境国家重点实验室,江苏南京210008

出　　处：《环境科学与技术》2017年第7期67-71,共5页Environmental Science & Technology

基　　金：国家自然科学基金项目资助(51508263;31270409)

摘　　要：利用稳定同位素技术,研究太湖贡湖湾的大型底栖动物河蚬和铜锈环棱螺的食物来源和营养结构,并分析其碳、氮稳定同位素空间分布特征。结果表明,河蚬和铜锈环棱螺的δ^(15)N值变化趋势相似,均随着离入湖口距离越远,其值逐渐升高,并能很好地指示湖湾的污染来源。河蚬和铜锈环棱螺处于相同的营养级,δ^(15)N值的差值在1.5‰~2.8‰之间。The food source and trophic structure of Corbicula and Bellamya, the macrobenthos, in the Gonghu Bay of Lake Taihu were studied, and the spatial distribution characteristics of the stable carbon and nitrogen isotope in the maerobenthos were analyzed as well using the stable isotope techniques. The results showed that the values of 6is N in both Corbicula and Bellamya varied in similar trend, and increased gradually when being farther from the inlet of the riverlet into the Bay, which could thus trace the pollution sources and indicated Corbicula and Bellamya at the similar trophic level. The results also illuminated that Corbicula and Bellamya were in the same trophic level with the difference of their δ^15 N ranging 1.5‰-2.8%‰.

关 键 词：底栖动物 碳稳定同位素 氮稳定同位素 太湖 富营养化 

分 类 号：X142[环境科学与工程—环境科学]