贝虾混养池底栖动物调查及有机污染评估

Investigation of Zoobenthos Bio-diversity and Bio-assessment of Water Quality in a Composite Cultivating Pond

在 1999年和 2 0 0 0年分别对一贝虾混养池的进水区 ,静水区和出水区的底栖动物进行调查 ,共得底栖动物 15种 ,其中 3种为优势种 ,栖息密度以多毛类占优势 ,采用综合生物污染指数评价水体质量显示该虾池水质有机污染严重 ,尤其是静水区 .另外两年的结果显示 2 0 0 0年水质有污染加重的趋势 。

In 1999 and 2000,the investigation on zoobenthos was carried out respectively in different sections of a shrimp culturing pond, which located in water-in, water-standing and water-out. Fifteen species of zoobenthos were observed and three of them were dominant in their inhabiting density. The largest density of zoobenthos was polychaete, which reached 115 ind/m 2. Using the bio-index which integrated Beck-index, Chandler Score system, Shannon-wiener-index and Simpson-index, we assessed the water quality of the pond. Results indicated that water in this pond was polluted seriously, especially in the section of water-standing. The water quality became worse in the second year. How to prevent water from pollution was also discussed in this paper.