亚热带水库浮游植物季节动态及其与环境因子的关系

以亚热带黄村水库流域为研究对象，探讨了浮游植物群落的季节变化及其与环境因子的关系。共鉴定出浮游植物51种，种类最多的是绿藻门（18种）（35.29%），其次是硅藻门（15种）（29.41%）和蓝藻门（11种）（21.57%）。从浮游植物群落季节组成差异来看，春季（62.96%）和夏季（71.03%）蓝藻门丰度最高，秋季（56.11%）和冬季（80.74%）硅藻门丰度最高。黄村水库流域优势种尖尾蓝隐藻（Chroomonas acuta）和曲丝藻（Achnanthidium sp.）在春夏秋冬季节均存在。多样性指数表明该流域水体处于中营养状况。温度、电导率和营养盐是影响浮游植物群落组成最主要的环境因素。

Seasonal dynamics of phytoplankton and its relationship with the environmental factors in subtropical reservoirs

The seasonal variations of phytoplankton community and their correlation with environmental factors in subtropical Huangcun reservoirs basin were investigated in this study. A total of 51 phytoplankton species were identified, in which 35.29% of Chlorophyta, followed by 29.41% of Bacillariophyta, and 21.57% of Cyanophyta. In terms of the seasonal composition of community, Cyanophyta was dominant in spring and summer, accounting for 62.96% and 71.03% of the abundance, respectively. While Bacillariophyta was the most abundant group during the fall and winter, with an average contribution of 56.1% and 80.74% to the abundance, respectively. The main dominant species in Huangcun reservoirs basin were Chroomonas acuta and Achnanthidium sp., which occurred in four seasons and were common dominant species. The diversity indices indicated that the basin was in mesotrophic condition. The water temperature, conductivity and nutrients were the environmental factors having the greatest influence on the phytoplankton community composition.