中文摘要：

2016年8月,系统调查研究了独流减河浮游植物结构群落组成、密度的分布特征及 与环境因子的关系.10个采样点中共鉴定出浮游植物5门45种及变种,优势种以蓝藻门为主, 包括皮状席藻、细小隐球藻、阿氏颤藻、螺旋藻、铜绿微嚢藻和优美平裂藻.各采样点浮游 植物密度变化在（4.15-27.5）×10^6 ind./ L之间.Shannon-Wiener指数在0.94-3.17,Pielou 指数在0.24-0.72,Margalef指数（ d）在0.69-1.72.灰关联分析结果表明,对独流减河 浮游植物密度影响最大的环境因子是锰,其相关性系数是0.74.

英文摘要：

An investigation was conducted on the phytoplankton＇s community composition, abund-ance, and their relations with environmental factors of Tianjin Duliujian River in August, 2016. A total of 45 phytoplankton species were identified, belonging to 5 phyla. Dominant species are com-pletely from Cyanophyta, they are phormidium corium, aphanocapsa elachista, oscillatoria agardhii, spirulina sp., microcystis aeruginosa, merismopedia elegans and so on. The phytoplankton＇s abun-dance of different sampling sites were from 4.15x 106 to 27.5x 106 ind./ L, Shannon-Wiener diversity index from 0.94 to 3.17, Pielou＇s index from 0.24 to 0.72,and Margalef＇s index from 0.69 to 1.72.The result of grey relational analysis suggested that the most influencing environmental factor was manganese, with the correlation rate 0.74.