巢湖藻华易堆积区蓝藻时空分布的研究

巢湖西半湖采样分析结果表明夏季蓝藻水华主要集聚于湖滨带。因此选择西半湖藻华易堆积的区域，并监测在风力驱使下蓝藻水华的时空分布规律，分析湖滨带浮游植物生物量与理化因子的相关性。结果表明：湖滨带水华生物量的分布容易受到风向和天气的影响；水体的叶绿素a浓度与总氮（TN）、总磷（TP）和高锰酸钾指数（CODMn）呈显著的正相关（p<001）；湖滨带水体中微囊藻（Microcystis）的生物量几乎占据水体总浮游植物生物量的95%以上，而且越靠近湖岸带微囊藻的生物量所占的比例越大。据此，可以选择湖滨带水华易聚集区作为蓝藻水华尤其是微囊藻去除的重点区域，以有效地削减蓝藻水华污染，从而为巢湖水生态系统的修复创造条件

SPATIAL-TEMPORAL DISTRIBUTION OF PHYTOPLANKTON IN BLOOM-ACCUMULATION AREA IN LAKE CHAOHU

The results from the western region of Lake Chaohu indicated that cyanobacterial blooms mainly accumulated in the lakeside zone.The area where large amounts of algal blooms mainly accumulated were chosen to monitor the spatial and temporal distribution of phytoplankton,and the correlation between phytoplankton biomass and physical and chemical factors was analyzed.The results showed that the biomass distribution of water blooms would be susceptible to wind direction and weather conditions.Chlorophyll a content was significantly correlated with total nitrogen (TN),total phosphorus (TP) and chemical oxygen demand (CODMn) (p<001).The biomass of Microcystis species almost accounted for more than 95% of the total water blooms,and the closer to the lakeshore the greater the biomass proportion of Microcystis species.Accordingly,the accumulation area of water blooms could be chosen as key areas for removing cyanobacterial blooms to effectively reduce pollutions,so as to create requirements for ecosystem restoration.