抚仙湖后生浮游动物种类组成及水质评价

通过对湖区内11个采样位点进行浮游动物采集，分析了抚仙湖浮游动物种类及数量组成，共检出浮游动物33种，幼体3类。其中轮虫27种，隶属9科14属；枝角类5种，隶属于4科4属；桡足类1种，主要优势种为螺形龟甲轮虫（Keratellacochlearis）、胶鞘轮虫（Collotheca sp．）、小型腹尾轮虫（Gastropus minor）、广生多肢轮虫（Ployarthravalgaris）、象鼻潘（Bosmina sp．）、舌状叶镖水蚤（Phfllodiaptomus tunguidus）及桡足类幼体（Copepodalarva）。轮虫Margalef多样性指数为3．42，浮游动物Shannon—Wiener多样性指数2．34，两项指标均反映抚仙湖的水质为清洁水体。，另外，浮游动物Shannon—Wiener多样性指数与高锰酸盐指数呈显著负相关。

The Species Composition of Metazoan Zooplankton and Water Quality Evaluation of Lake Fuxian

The composition and number of the zooplankton species have been analyzed by their collection at the 11 sampling sites of Lake Fuxian. 33 species of the zooplankton and three larval varieties have been found. Of which, there are 27 species of Rotifers, belonging to 14 genera of 9 families; 5 species of Cladocerans, belonging to 4 genera of 4 families; and 1 species of Copepods. The dominant species are Keratella cochlearis, Collotheca sp. , Gastropus minor, Ployarthra valgaris, Bosmina sp , Phyllodiaptomus tunguidus and Copepoda larva. The Margalef diversity in- dex of Rotifera is 3. 42, and the Shannon - Wiener diversity index of zooplankton is 2. 34. They both show that the lake water is clean. The Shannon -Wiener diversity index has a negative correlation with the permanganate index.