【摘要】 北京市通惠河高碑店湖是再生水补水的景观湖。为研究补给再生水后景观水体浮游植物群落结构特征,于2018年5—11月间,对高碑店湖浮游植物进行逐季度调查研究。在采集浮游植物水样的同时,进行了水温、总氮、总磷等水质因子的监测,并运用典范对应分析（CCA）方法分析了浮游植物群落结构季节动态及其与环境因子的关系。结果表明,调查到浮游植物6门49属95种（含变种）,主要优势种春季为铜绿微囊藻（Microcystis aeruginosa）和空球藻（Eudorina elegans）,夏季为杂球藻（Pleodorina californica）、弱细颤藻（Oscillatoria tenuis）、颗粒直链藻最窄变种（Melosira granulata var.angustissima）,秋季为梅尼小环藻（Cyclotella meneghiniana）、四尾栅藻（Scenedesmus quadricauda）、单角盘星藻具孔变种（Pediastrum simplex var.duodenarium）、微芒藻（Micractinium pusillum）,优势种季节变化明显;春季浮游植物密度高于夏季和秋季,其值为5.51×10⁸ cells/L,物种多样性指数春季>夏季>秋季,最高值为3.88,物种丰富度指数秋季>春季>夏季,最高值为1.92;CCA分析结果说明对浮游植物群落结构具有影响的主要水环境因子为WT（水温）、SD（透明度）、BOD₅（生化需氧量）和TP（总磷）。更多还原

【Abstract】 Gaobeidian Lake of Tonghui River in Beijing is a landscape lake with reclaimed water. In order to study the characteristics of the phytoplankton community structure in the landscape water body after replenishing the reclaimed water, a quarterly survey and research on the phytoplankton in Gaobeidian Lake was carried out from May to November 2018.While collecting phytoplankton water samples, the water quality factors such as water temperature, total nitrogen and total phosphorus were monitored, and the seasonal dynamics of phytoplankton community structure and its relationship with environmental factors were analyzed by canonical correspondence analysis（CCA）.The results showed that 95 species（including variants） of 49 genera and 6 phytoplanktons were observed. The results showed that 95 species（including variants） of 49 genera and 6 phytoplankton species were investigated. Dominant species displayed obvious variation with season. The main dominant species were Microcystis aeruginosa,Eudorina elegans in spring, and Pleodorina californica,Oscillatoria tenuis,Melosira granulata var. angustissima in summer, and Cyclotella meneghiniana,Scenedesmus quadricauda,Pediastrum simplex var. duodenarium,Micractinium pusillum in autumn.The phytoplankton density in spring was higher than that in summer and autumn, the value was 5.51×10⁸cells/L, the species diversity index was spring > summer > autumn, the highest value was 3.88, and the species richness index was autumn > spring > summer, the highest value was 1.92. The results of canonical correspondence analysis indicated that the main water environmental factors influencing the structure of phytoplankton community were water temperature, transparency, BOD₅（biochemical oxygen demand） and TP（total phosphorus）.更多还原