生态环境学报2011，Vol.20Issue(8)：1278-1288,11.
武汉东湖近代沉积物中总氮、总磷与生物硅沉积与营养演化的动态过程
The dynamic process of nutrition evolution of TN, TP and BSi in the modern sediments in the Donghu Lake, Wuhan
摘要
Abstract
The Donghu Lake, being at a high eutrophic status due to eutrophication in Wuhan, was choosen as the study area, where sediment samples were collected and analyzed for the contents of total nitrogen (TN), total phosphorus (TP) and biogenic silica (Bsi) in the 4 sub-lakes. The results showed that: in comparison with the deposition rate of the Donghu Lake (about 0.33cm/a), in the bottom of 41 ~ 50 cm (1860 ~ 1890a) and 31 - 40 cm (1890a - 1920a), TN, TP and Bsi were the basic natural lake sediments in the 4 sub-lakes. In the middle of 21 ~ 30 cm (1920a ~ 1950a), while human activities had increased, the deposition changed. In the surface sediments of 0-10 cm (1980a ~ 2010a), and 11 ~ 20 cm (1950a - 1980a), the depositions of TN, TP and Bsi were generally increased. The comparative study on the sediments such as TN, TP and Bsi in the 4 sub-lakes of the Donghu Lake showed that: increasing human activities on the Donghu Lake led to more nitrogen and phosphorus emissions, promoted the growth of diatoms and consumption of silicon in the Donghu Lake. There was also a significant difference in the deposition of nitrogen, phosphorus and silicon among the 4 different sub-lakes of the Donghu Lake, which might be related to the different impacts of human activities.关键词
东湖/沉积物/总氮/总磷/生物硅/营养演化Key words
Donghu Lake/ sediment/ total nitrogen/ total phosphorus/ biolgenic silica/ nutrition evolution分类
资源环境引用本文复制引用
胡胜华,叶艳婷,郭伟杰,贺锋,周巧红,吴振斌..武汉东湖近代沉积物中总氮、总磷与生物硅沉积与营养演化的动态过程[J].生态环境学报,2011,20(8):1278-1288,11.基金项目
国家自然科学基金项目(50808172) （50808172）
国家“十一五”水专项(2009ZX07106-002-004) （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) （2006AA305AA03）
