武汉严东湖近代沉积物中总氮、总磷与生物硅沉积及营养演化的动态过程  

The TN, TP and BSi in the modern sediments and with the dynamic process of nutrition evolution in the Yandonghu Lake of Wuhan

作　　者：胡胜华[1] 叶艳婷[1,2] 郭伟洁[1,2] 张婷[1,2] 周巧红[1] 徐栋[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

出　　处：《生态环境学报》2011年第1期124-131,共8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);湖北省科技攻关重大项目(2006AA305AA03);武汉市科技攻关项目(200860213022)

摘　　要：选择武汉近郊一中型浅水湖泊——严东湖为研究对象,对其进行了2个柱状沉积物的总氮、总磷、生物硅含量测试。结果表明:严东湖表层沉积物中总氮、生物硅含量总体均有所上升,而总磷近代含量有所下降。近代以来,硅藻的生长消耗了水体大量的硅与磷,表现为生物硅含量的显著上升,严东湖的营养程度有所上升。硅藻的生长与沉积影响到湖泊的沉积系统与过程,使营养盐比例与结构发生了变化,导致严东湖水体出现硅限制。Select a medium-sized shallow lake in the suburb of Wuhan——the Yandonghu Lake for the study.And test the content of two core sediments of the total nitrogen（TN）,total phosphorus（TP）,biogenic silica（BSi） content in it.The results showed that： TN and BSi in the surface sediments of the Yandonghu Lake have risen in general,while the modern content of TP decreased.In modern times,the growth of diatoms consumed large amounts of silicon and phosphorus in the water body,which showed by the significant increase of the content of BSi and the increase of nutritional level of the Yandonghu Lake.Diatom growth and sedimentation affect to the deposition system and process of the Yandonghu Lake,which leading to the ratio and structural changes of nutrients and the silicon lake water restrictions appear.

关 键 词：严东湖 沉积物 总氮 总磷 生物硅 营养演化 

分 类 号：X142[环境科学与工程—环境科学]