太湖水体溶解营养盐(N、P、Si)的冬、夏二季变化特征及其与富营养化的关系  

SEASONAL VARIATIONS IN COMPOSITION AND DISTRIBUTION OF DISSOLVED NUTRIENTS IN THE WATER COLUMN OF TAIHU LAKE, CHINA

作　　者：李军 刘丛强[1] 王仕禄[1] 周志华[1] 朱兆洲[1] 肖化云[1] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室

出　　处：《地球与环境》2005年第1期63-67,共5页Earth and Environment

基　　金：中国科学院知识创新工程项目(KZCX1 SW 12);中国科学院知识创新工程项目(KZCX2 105);国家重点基础研究发展规划项目(2002CB412300)

摘　　要：先后于冬季(2003年1月)和夏季(2003年7月)对太湖水体溶解营养盐的组成进行了调查,分析了营养盐在湖水中的分布规律,初步探讨了太湖浮游植物营养盐限制因子的季节变化特征。结果显示:太湖溶解无机氮、磷、硅夏季比冬季略高一点,主要来自流域外源输入和湖泊内源释放,分布趋势受人为活动大小和湖泊自身特点的影响。In order to understand the cycling of nutrients in shallow lakes, the compositional and distributional characteristics of dissolved nutrients (N, P and Si) in the water column of Taihu Lake during winter (January, 2003) and summer (July, 2003) are described. On a whole, nutrients, ions and alkalinity are higher during summer than in winter at all stations, and tend to decrease gradually from station T1 to station T6. This trend indicated the anthropologic activities and lake characteristics have a strong impact on the water quality of Taihu Lake. Soluble reactive phosphate has positive correlations with soluble reactive silicate, implying the loading of high nutrients in Taihu Lake mainly originated from external input. Ratios of N∶P, Si∶P and Si∶N in the water column of Taihu Lake show the nutrient limitation for phytoplankton varies according to seasonal changes, suggesting that changes in nutrient structure would affect the phytoplankton community.

关 键 词：冬季 夏季 太湖 水体 溶解营养盐 

分 类 号：X142[环境科学与工程—环境科学]