漳泽水库藻类Margalef氏多样性指数(D)趋势分析

Trend Analysis of Margalef′s Diversity Index(D) of Algae in Zhangze Reservoir

通过对漳泽水库2010到2013年藻类监测资料Margalef氏多样性指数(D)分析,水库各个采样点评价结果具有一定的相关性,差异不大,大多数时候都在2以上,对应的污染程度为中度污染水平,时常指数也会低于2,出现重度污染。从变化趋势分析,2010到2013年,水库重度污染出现的频率越来越频繁。漳泽水库藻类的生物多样性处在中等水平,这与水库的营养物质较多,处于中度污染的状况相对应。

Through the analysis of Margalef ′s diversity index(D)of algae monitoring data of Zhangze Reservoir from 2010 to 2013,the evaluation results of each sampling point in the reservoir had certain correlation,but the difference was not significant. Most of the time, the index values were above 2 and the corresponding pollution degrees belong to medium pollution levels.Sometimes,these values were below 2 and that belong to serious pollution levels. The frequency of reservoir serious pollution was more and more frequent from 2010 to 2013,according to the trend analysis.The biodiversity of algae in Zhangze Reservoir was in the middle level,which corresponds to the condition of moderate pollution and more nutrients in the reservoir.