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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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南亚热带城市浅水湖泊富营养化与浮游植物群落的时空特征：以肇庆星湖为例
DOI: 10.3724/SP.J.1145.2009.00153, PP. 153-160
Keywords: 富营养化,浮游植物,城市浅水湖泊,南亚热带
Abstract:
星湖位于我国南亚热带地区，为城市浅水湖泊，由5个子湖(仙女湖、波海湖、青莲湖、中心湖和里湖)组成.于2002年的1月、3月、7月、8月、10月和12月对前4个子湖的水质和浮游植物进行了采样分析.星湖的总氮和总磷浓度分布范围分别为0.351~2.488mgl-1和0.009~0.151mgl-1，营养盐浓度变化规律均在3月达到最高值，7、8月逐渐降低，10、12月又有所增加.星湖的营养状态(tsi：40~56)整体处于中富营养化向富营养化过渡的阶段，各子湖营养状态存在一定的空间差异，波海湖富营养化程度最高，而仙女湖和青莲湖最低，这种空间差异主要由污染物的入湖位置和子湖的水动力连通特点所决定.从星湖共检到浮游植物128种，其丰度的分布范围为0.85×106~44.28×106cellsl-1.浮游植物3月丰度最低，7、8月最高.在数量组成上，4个子湖的浮游植物群落有很高相似性，群落结构以蓝藻？绿藻为优势类群.1月以绿藻和硅藻占优势，7、8、10和12月则由蓝藻占绝对优势，平列藻是最主要的优势种.浮游植物丰度的季节变化主要受季节性的降水和湖泊水位调节的影响.图2表6参30
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