文章基本信息

标题：Change characteristics of DSi and nutrition structure at the Yangtze River Estuary after Three Gorges Project impounding and their ecological effect
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作者：Lei Li ; Xinqiang Shen ; Mei Jiang 等
期刊名称：Archives of Environmental Protection
印刷版ISSN：2083-4772
电子版ISSN：2083-4810
出版年度：2017
卷号：43
期号：2
页码：74-79
DOI：10.1515/aep-2017-0012
语种：English
出版社：Walter de Gruyter GmbH
摘要：The variation law of dissolved silica (DSi), dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP) and nutrition structure after the Three Gorges Project (TGP) impounding as well as their ecological effect were analyzed according to monitoring survey of the Yangtze River Estuary in spring (May) and summer (August) from 2004-2009. The results showed that after impounding, DSi and DIN concentration decreased and increased, respectively. During the study period, DSi decreased by about 63%, while DIN almost tripled. DIP concentration fluctuated slightly. With respect to nutrition structure, N:P increased, whereas Si:P and Si:N declined. According to chemometry standard of nutrient limits, nutrition structure tended to be imbalanced and the limiting factor of phytoplankton growth (P) was studied. Changes of nutrition structure have largely decreased diatom and caused different composition of dominant phytoplankton species. This may change ecosystem structure of the Yangtze River Estuary.
关键词：Three Gorges Project ; Yangtze River Estuary ; DSi ; nutrition structure