【摘要】 2020年4—10月对衡水湖进行了浮游植物及水质调查，共发现浮游植物春季64种、夏季77种、秋季68种，隶属于6门41属，以绿藻门、硅藻门、蓝藻门的种类数最多，优势种为梅尼小环藻(Cyclotella meneghiniana)、四角十字藻(Crucigenia quadrata)。2020年4—10月衡水湖浮游植物的生物多样性指数值根据Shannon-Wiener多样性指数评价方法为1.715～2.713,Margalef丰富度指数为2.566～3.057,Pielous均匀度指数为0.773～0.812。藻密度数据结果显示，7月份2个站位、10月份4个站位存在轻度水华特征。根据水域营养状态指数及分级评价方法，衡水湖水域水质富营养化水平总体处于“轻度-中度富营养”状态。更多还原

【Abstract】 A survey of phytoplankton and water quality in Lake Hengshui was conducted from April to October in 2020. A total of 64 species of phytoplankton were found in spring, 77 species in summer and 68 species in autumn, belonging to 6 phyla and 41 genera. The top three largest numbers of species belonged to Chlorophyta, Diatoms and Cyanophyta. From April to October of 2020,the phytoplankton biodiversity index of Lake Hengshui ranged from 1.715 to 2.713,Margalef richness index ranged from 2.566 to 3.057,and Pielous evenness index ranged from 0.773 to0.812 according to Shannon-Wiener diversity index evaluation method. The algal density showed that there were mild blooms in two sites in July and four sites in October. The eutrophication level of water quality in Lake Hengshui was in the state of "mild to moderate eutrophication" according to the water nutrition state index and grading evaluation method.更多还原