【摘要】 为明晰巢湖湖区水质状态对浮游植物多样性的影响，2020年1月、4月、7月和9月分别测定浮游植物多样性以及水体理化指标。结果表明：巢湖浮游植物多样性存在明显的时空差异，春季浮游植物的Shannon-weinerIndex最高（1.45），秋季（0.27）显著低于其他季节（P<0.05）；巢湖西湖心的Shannon-weinerIndex(0.41)显著低于新河入湖区（2.25）(P=0.03)。Pearson相关性分析结果表明，富营养指数的变化与浮游植物的Shannon-weiner多样性指数不相关（P>0.05），水质等级的下降对浮游植物的Shannon-weiner多样性指数具有显著的负面影响（P=0.001）。季节性的光温变化、湖泊周边土地利用类型所导致的水质差异，以及水体稀释效应是影响浮游植物多样性时空格局的主导因素。更多还原

【Abstract】 In order to clarify the impacts of water quality on phytoplankton diversity in Chaohu lake, Shannon-weiner index(H′) of phytoplankton community and water index are measured in January, April, June and September in 2020. The results showed obvious spatial and temporal differences in phytoplankton diversity in Chaohu lake. H ′was the highest in spring(1.45), and the autumn(0.27) was significantly lower than other seasons(P<0.05). H′(0.41) in center of the West lake was significantly lower than that in the inflow area of the Xinhe river(2.25)(P=0.03). Pearson correlation analysis showed the change of trophic state index is not correlated with H′(P>0.05), and the decrease of water quality grade had negative impact on H ′(P=0.001). Seasonal light and temperature changes, water quality differences caused by land use types around the lake and water dilution effects were dominant factors affecting the spatial and temporal patterns of phytoplankton community diversity.更多还原