武汉东湖浮游植物群落结构的时空变化与环境因子的关系  

Temporal and Spatial Variation of Phytoplankton Structure and its Relationship with Environmental Factors in Lake Donghu

作　　者：唐汇娟[1] 谢平[2] 刘丽[1] 赵会宏[1] 杨慧荣[1] 

机构地区：[1]华南农业大学动物科学学院,广东广州510642 [2]中国科学院水生生物研究所,湖北武汉430072

出　　处：《中山大学学报（自然科学版）》2008年第3期100-104,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(30771652);华南农业大学博士启动基金资助项目(4300-K05108)

摘　　要：研究了武汉东湖浮游植物群落结构的时空变化。东湖3个采样点的TN和TP含量存在显著差异。东湖Ⅰ、Ⅱ站浮游植物生物量的最高值出现在冬季和春季,Ⅲ站生物量的最高值则出现在夏季。相对于东湖较高的营养盐含量,其浮游植物生物量相对较低。这一方面是因为东湖较高密度的滤食性鲢鳙鱼的摄食作用抑制了浮游植物生物量的升高,另一方面是由于东湖较低的透明度使浮游植物的生长受到光照的限制。由于受到滤食性鱼类摄食、较高的营养水平以及较低的透明度的影响,东湖的浮游植物主要由隐藻、真蓝裸甲藻、小环藻和直链藻以及小型的绿球藻和蓝藻所组成。Temporal and spatial variation of phytoplankton structure in the lake was studied. TN and TP concentrations were significantly different among three stations. Phytoplankton biomass peaked in winter and spring at station Ⅰ and Ⅱ , while it peaked in summer at station Ⅲ. Compared with many other eutrophic lakes with similar or even lower nutrient concentrations, phytoplankton biomass in Lake Donghu was much lower. It was probably due to both high grazing pressures from filter-feeding fishes and light limitation. Phytoplankton in Lake Donghu is mainly composed of flagellated Cryptomonas and Gymnodinium eucyaneum, centric Cylotella spp and Melosira ambigua, small sized cyanobacteria and chlorococcales, most of which were typical species in condition of high grazing and high nutrient level.

关 键 词：浮游植物 环境因子 东湖 

分 类 号：X524[环境科学与工程—环境工程]