北京翠湖湿地浮游动物调查及水质评价

A Survey of Zooplankton and Assessment Water Quality in Cuihu Wetland of Beijing

2012年4月至10月,在翠湖湿地选6个具有代表性的采样点,分别对湿地水体内浮游动物的种类及数量进行的调查显示,在翠湖湿地共有浮游动物4大类45种,其中以轮虫和原生动物种类最多,占浮游动物总数的82.2%。翠湖湿地浮游动物数量以6月最多,4月次之,8月和10月的种类数量相差不大。E/O指数等多种评价方法结果均显示翠湖湿地水体呈富营养化状态,6月翠湖湿地水体为超富营养类型。翠湖湿地外围取水渠的水质最差,其次为荷花塘和雁鸭湖,边境湖和天鹅湖的水质相对较好。

From April to October in 2012, 6 representative samples were collected from Cuihu Wetland to analyze the species and population size of zooplankton in water body. 45 species of zooplankton belonging to 4 major categories were identified in the wetland. Among them, Rotifera and Protozoa had tile highest Immber of species, accounting for 82.2% of the total number of zooplankton. The number of zooplankton peaked in June, and followed by April. The difference of species number between August and October was not evident. Assessment by E/O index and some other methods showed that the water body of Cuihu Wetland is in eutrophication and at a state of super eutrophication in June. Results also showed that the worst water quality was in the surrounding canals, followed by Hehua Pond and Yanya Lake, the water quality of Bianjing Lake and Tian＇e Lake was relatively good.