永定河浮游动物群落结构及水环境评价摘要本文对天津永定河干流市内段的水域进行浮游动物种类区系组成、现存量（密度、生物量）及分布进行了调查研究
给出了永定河干流具有指示意义的代表种类
并计算出了相应的生物多样性指数
结合历史数据和本次试验的结果，对于调查水域进行了生态环境质量评价
结果显示，目前天津市内永定河干流水质为富营养型，其水生态状况依旧不容乐观
我们同时对环境管理和改善水质提出了自己的措施建议
关键词：永定河；浮游动物；生物学评价1 / 21 Abstract The currant faunistic, standing crop (density and biomass) and distribution of zooplankton on Haihe River are investigated and studied in this research
The representative indicator species to this area is given under the study
Also a Biodiversity Index analysis is performed
Based on the present study and the historic investigated data, an ecological and environmental status of the investigated area is assessed and evaluated
From the results of this research we can find out that the water quality of the Haihe River can be delimited to eutrophic type
