东平湖水域浮游植物群落组成与生物量研究

Studies on Community Characteristics and Biomass of Phytoplankton in Dongping Lake

研究了2006～2007年东平湖水域浮游植物群落组成、生物量和生物多样性及变化。结果表明:东平湖共检出浮游植物8门142种。其中绿藻种类最多,64种,占浮游植物总种数的45.07%;其次为蓝藻门、硅藻门和裸藻门,分别为27种、26种和10种,占19.01%、18.31%和7.04%;甲藻门、黄藻门、隐藻门和金藻门相对较少,分别为6种、4种、3种和2种,占4.23%、2.82%、2.11%和1.41%。浮游植物栖息密度和生物量变化范围分别为(0.10～13.84)×107ind./L和0.45～37.23 mg/L。东平湖浮游植物多样性指数和均匀度指数变化范围分别为0.41～3.92和0.11～0.87,多样性和均匀度均较好,表明东平湖水域浮游植物群落结构处于较完整和稳定的状态。

Phytoplankton community structure and biomass variation of Dongping Lake in 2006 and 2007 were studied.The results showed that: 142 species of phytoplankton were collected,which were belonged to 8 phyla.Most of the phytoplankton community was composed by 64 species of Chlorophyta,which contributed the greatest accounting for 45.07% of the community species;then the phytoplankton community included 27 species of Cyanophyta,26 species of Bacillariophyta and 10 species of Euglenophyta,which contributed the greater accounting for 19.01%,18.31% and 7.04% of the community species,repectively;and the phytoplankton community also included 6 species of Pyrrophyta,4 species of Xanthophyta,3 species of Cryptophyta and 2 species of Chrysophyta,which contributed the least accounting for 4.23%,2.82%,2.11% and 1.41% of the community species.The density and biomass of phytoplankton were(0.10 ～13.84)×107ind./L and 0.45～37.23mg/L,respectively.The value of Shannon-Wiener's index and Pielou's index were 0.41～3.92 and 0.11～0.87 respectively,which showed that the community structure of phytoplankton was integrated and steady in Dongping Lake.