杭州西湖湖湾生物硅沉积测定与营养演化的过程  

The determination of biogenic silica in the sediments and evaluative dynamics to eutrophication of Xihu Lake Bay, Hangzhou

作　　者：胡胜华[1] 贺锋[1] 孔令为[1,2] 张聪[3] 李泽[3] 徐洪[4] 周巧红[1] 吴振斌[1] 

机构地区：[1]中国科学院水生生物研究所,淡水生态与生物技术国家重点实验室,湖北武汉430072 [2]中国科学院研究生院,北京10049 [3]武汉理工大学,湖北武汉430072 [4]中国地质大学(武汉),湖北武汉430074

出　　处：《生态环境学报》2011年第12期1892-1897,共6页Ecology and Environmental Sciences

基　　金：国家自然科学基金项目(50808172);国家“十一五”水专项(2009ZX07106-002-004)

摘　　要：选择杭州西湖3处湖湾——茅家埠、乌龟潭、浴鹄湾作为研究对象,通过3处湖湾多点浅钻的表层沉积物生物硅质量分数测试,通过底泥分析西湖疏浚与水环境治理措施的效果。研究发现:对照西湖沉积速率(4 mm/a),3处湖湾表层沉积物中生物硅质量分数高低依次为茅家埠、乌龟潭与浴鹄湾。近10年来不同湖湾沉积物中生物硅沉积含量相差较大,这一时期正对应着西湖综合环境整治工程。对西湖3个湖湾表层沉积物中生物硅质量分数研究表明:西湖水体中的氮、磷、硅促进了硅藻的生长与硅的消耗,不同湖湾之间生物硅沉积存在着明显差异,这可能与人类活动的影响差异有关。The aim of this study was to analyze the contents of biogenic silica （BSi） in the sediments of three lake bays （Maojiabu, Wuguitan and Yuhuwan ） in the Xihu lake in Hangzhou, which is already at a certain level of eutrophication. The results showed that contrasting with the deposition rate of the Xihu Lake （about 4 mm/a）, the content of BSi in the three surface sediments from high tolow was Maojiabu, Wuguitan and Yuhuwan. The BSi content of the three surface sediments varied greatly during the last decade, when comprehensive environmental renovation projects regarding the Xihu lake was in progress. The comparative study on the BSi content in sediments of the three Lake Bays in the Xihu Lake showed that the increasing impacts induced by human activities on theXihu Lake led to more nitrogen and phosphorus aggradation, and then promoted the growth of diatoms and silicon consumption in the Xihu Lake. There were significant differences in the deposition of silicon between different lake bays belonging to the Xihu Lake, which might be strongly related to the different impacts of human activities.

关 键 词：杭州西湖 茅家埠 乌龟潭 浴鹄湾 生物硅 沉积物 

分 类 号：X83[环境科学与工程—环境工程]