南京市主要湖泊浮游植物群落结构分析

2008年春季，对南京市7个主要湖泊浮游植物及水质进行了调查。结果表明，南京市主要湖泊处于中营养状态到中富营养状态，其中城市湖泊富营养化较为严重，作为饮用水源地的固城湖、金牛湖处于中营养状态，但固城湖浮游植物群落结构表现出富营养化特征。富营养湖泊中出现的种类以硅藻为主，数量以硅藻为主；中营养湖泊中出现的种类以硅藻为多；数量以隐藻、蓝藻为主。各湖泊浮游植物数量与营养状态呈显著正相关。

Community Structure of Phytoplankton in Main Lakes of Nanjing

The community structures of phytoplankton and water quality in seven lakes of Nanjing were investigated in spring, 2008. The research results show that the lakes nutrition status in Nanjing are between mesotmphicaiton and mesoand eutrophication, in which some city lakes is in serious eutrophication and Gucheng lake and Jinniu lake as drinking water source are in mesotrophication, while Gucheng lake shows eutrophication indicated by the community structure of phytoplankton. Diatom is main species and its number is the highest in eutrophic lakes, while the numbers of Cryptomonas and Cyanobacteria are the highest in mesoand eutrophic lakes. The nutrition status is marked positive relationship with number of phytoplankton in all kinds of lakes in Nanjing.