The result of the research is: Comparing in autumn with in summer, the individual density of living beings reduce, the diversity index rise, the species of the living beings wh...

• 重污染水质指示生物种类数下降,轻污染水质指示生物种类数上升,表明着生生物群落的生态学变化对水质有较好的监测和指示作用。