中文摘要：

调查了武汉南湖浮游植物的群落结构，在5个采样站鉴定出浮游植物67种，隶属于7门24科43属。其中绿藻门种类最多（28种），金藻门最少（1种）。浮游植物平均密度为2．489×10^6ind.／L，秋季最高为2．979×10^6ind.／L，夏季最低为1．949×10^6ind.／1，；平均生物量为7．94mg／L，其中隐藻牛物量最高，为2，33mg／L，甲藻和金藻最低，分别为0．06mg/L和0.01mg／L；浮游植物的密度和生物量在5个采样站之间无显著性差异，其Margalel多样性指数较低，存1～2之间。

英文摘要：

Phytoplankton community structure of Lake Nanhu was investigated. Totally 67 species belonging to 43 genera, 24 families, 7 phyla were identified at five sampling stations. The chlorophyta had the most species and the chrysophyta had the least. The average density of phytoplankton was 2. 4× 10^6ind./L, with a maximum of 2. 979× 10^6ind./L in autumn and a minimum of 1. 949 × 10^6ind./L in summer. The average biomass of phytoplanktou was 7.94 mg/L, with a maximum of 2. 33 mg/L for cryptophyta and a minimum of 0. 06 mg/L for pyrrophyta and 0. 01 mg/L for chrysophyta. There were no significant differences of phytoplankton density and biomass among the five stations and the Margalef diversity index of phytoplankton was low, between 1 and 2.