摘要
河流是湖泊物质运移的重要通道,对湖泊生态系统有重要的影响。各矿质元素及营养物质迁移、累积使得河湖交汇处成为重金属元素和营养物质的汇库。通过对太湖的入湖河流及其与太湖交汇区域不同植物群落沉积物中矿质元素、有机质含量分析,结果表明:河流表层沉积物重金属元素含量是其与太湖交汇区表层沉积物重金属元素含量的4～5倍。而元素间的相关系数因不同的生态环境存在差异,且P、Ca、Cu、Sr与其它元素间在河湖交汇区及定向河道均无显著相关关系;而SOM在河湖交汇区有强相关,而在河流中则否。
Rivers are essential channels of material input into lakes and have a significant effect on lake ecosystems. Estuary is often a sink for various kinds of mineral elements. The paper,by investigating the content of mineral elements and organic substances of sediments with different plant community in the rivers flowing into the East Lake Taihu and the estuary area,found that the content of heavy metals in surface layers of sediments in the rivers is 4 to 5 times of that in their estuary area. Besides,the correlations among elements were different in different ecosystems. There was no significant correlation between P,Ca,Cu,Sr and other elements in the estuary area and rivers; strong correlation of SOM is found in the intersection area,while not in the rivers.
出处
《生态环境学报》
CSCD
北大核心
2009年第5期1644-1648,共5页
Ecology and Environmental Sciences
基金
国家863计划项目(2002AA60101)
江苏省教育厅指导计划项目(06KJD610177)
关键词
水生生态系统
重金属
河流
太湖
Aquatic Ecosystems heavy metals river lake Taihu
