In these two sites, the benthic animal community were mainly composed of oligochaeta and chironmus larva, they were adaptive to low concentration DO and were resistive to organic pollution.

• 西湖和青山水库底栖动物群落主要由寡毛类和摇蚊幼虫组成,存在适应低溶氧、耐有机污染的种群。