阳澄湖浮游植物研究及其富营养化评价

Studies on Phytoplankton of Yangchenghu Lake and its Eutrophication Evaluation

通过对阳澄湖水体2002年-2007年间浮游植物的调查研究,结合富营养化理化指标进行分析,结果表明:该水域共发现浮游植物8门92属283种(包括变种),其中以硅藻门的种类占优势;浮游植物的种类和数量随年度和水域不同而呈现差异;浮游植物对阳澄湖富营养化具有较好的指示作用,水体为轻度富营养化水体,近年来有加重的趋势。本研究为建立阳澄湖长期生态研究数据信息库及长江中下游淀泖地区浅水型湖泊的生态环境保护政策制定提供科学依据。

According to the investigations of Eutrophication in Yangcheng Lake from 2002 to 2005, ombining with its Eutrophication physicochemical parameters,283 species and varieties of phytoplankton were identified, which belong to 8 divisions and 92 genera. The dominant species were Bacillariophyta. The species and the numbers of phytoplankton in different years and water areas showed marked variation. The water eutrophication status can be indicated by phytoplankton. The nutrition type of water source area could be regarded as light eutrophication level, but the water was showing a deeper and more far - reaching trend in recent years. This study will provide scientific base for the data pool of long - term ecological research and the policy of ecological environmental protection on shallow Lakes in Dianmao region of the lower- middle reaches of the Yangtze River.