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当前位置: 首页 > 文章 > 沅水浮游植物群落结构特征 淡水渔业 2007,37 (3) 72-77
Position: Home > Articles > Community Structure of Phytoplankton in Yuanshui River Freshwater Fisheries 2007,37 (3) 72-77

沅水浮游植物群落结构特征

作  者：
刘明典;杨青瑞;李志华;刘绍平;黄木桂;吴志新
单  位：
华中农业大学水产学院;农业部淡水鱼类种质资源与生物技术重点开放实验室中国水产科学研究院长江水产研究所
关键词：
浮游植物;密度;生物量;Shannon-Wiener多样性指数;沅水
摘  要：
于2005年3、6、9、12月对沅水浮游植物群落结构进行了调查。结果表明:沅水浮游植物共计6门147种,以硅藻和绿藻为主,分别占43.53%和36.73%。浮游植物平均密度为2.21×105ind./L,蓝藻密度最大为1.33×105ind./L;浮游植物平均生物量为3.97 mg/L,蓝藻生物量最大为3.42 mg/L。浮游植物季节变化比较明显,密度秋季最大(4.64×105ind./L),夏季最小(1.6×104ind./L);生物量冬季最大(12.86 mg/L),夏季最小(0.2 mg/L)。水平分布密度和生物量均是牛鼻滩站最大,分别为6.03×105ind./L和29.6 mg/L。调查显示沅水浮游植物中巴豆叶脆杆藻、颗粒直链硅藻、钝脆杆藻、美丽星杆藻、细星杆藻、格孔单突盘星藻、泥污颤藻、铜绿微囊藻等为优势种。浮游植物Shannon-Wiener多样性指数较低,在1～2之间。指数变化由高到低分别为冬季、秋季、春季、夏季。
译  名：
Community Structure of Phytoplankton in Yuanshui River
作  者：
LIU Ming-dian1,2,YANG Qing-rui1,2,LI Zhi-hua2,3,LIU Shao-ping2,3,HUAN Mu-gui2,3,WU Zhi-xing1(1.Fisheries College,Huazhong Agricultural University,Wuhan 430070;2.Key Lab of Freshwater Fish Germplasm Resources and Biotechnology of Ministry of Agriculture,Yangtze River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Jingzhou,Hubei 434000;3.Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences,Wuxi,Jiangsu 214081)
关键词：
phytoplankton;density;biomass;Shannon-Wiener diversity index;Yuanshui River
摘  要：
Phytoplankton community structure of Yuanshui River was investigated in March,June,September,December,2005.147 species from 6 phylum of phytoplankton were identified.The dominant algaes were Bacillariophyta and Chlorophyceae with a ratio of 43.53% and 36.73%,respectively.The average density of phytoplankton was 2.21×105 ind./L.The predominant algae was Bacillariophyta with 1.33×105 ind./L.The average biomass of algae was 3.97 mg/L,Chlorophyta was the largest with the biomass of 3.42 mg/L.There were significant differences of phytoplankton density and biomass in four different seasons.The maximum 4.64×105 ind./L was in autumn and the minimum 1.6×104 ind./L was in summer.About biomass,the maximum 12.86 mg/L was in winter and the minimum 0.2 mg/L was in summer.The density and biomass of phytoplankton in the station of Niubitan were both the largest in all nine stations,with 6.03×105 ind./L and 29.6 mg/L.It showed that Fragilaria crotonensis,Melosira granulata,Fragilaria capucina,Asteronella formosa,Asteronella gracillima,Pediastrum simplex var.clathratum、Oscillatoria limosa、Microcystis aeruginosa were dominant species.Shannon-Wiener diversity index of phytoplankton was low,between 1 and 2.In four seasons,the index in winter was the largest of all,second in autumn,third in spring and the least in summer.

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