花垣河软体动物多样性调查和水质评价

Investigation of the Diversity of Mollusca and Evaluation of Water Quality in the Huayuan River

对湘西花垣河软体动物的种类以及多样性进行了调查,并用生物多样性指数对花垣河水质进行了评价。8个断面除S1、S3、S8断面的软体动物丰富度指数（DMA）与Shannon-Wiener多样性指数（H）分别介于0.2643～2.4937和0.6765～2.4123外,S2、S4、S5、S7、S8五个断面的软体动物丰富度和多样性指数均为零。研究结果表明,花垣河软体动物资源贫乏,其多样性指数表明,花垣河水体受到严重污染。

The species and diversity of molluscas and water quality in the Xiangxi Huayuan River were studied. The species richness indexes （ DMA ） and Shannon - Wiener diversity indexes （ H＇ ） of mollusca at Sl,S3 ,S8 were 0.2643 - 2.4937 and 0.6765 - 2.4123, respectively. The DMA and H＇ at the other 5 sections were zero. The results suggested that the resources of molluscas is smallness, the indexes of diversity indicate that the water have been polluted severity.