大庆水库底栖动物群落调查及生物学评价

对2001-2005年大庆水库的底栖动物进行了生态调查.共观察到4科7属底栖动物,其中:软体动物为1科1属,环节动物为1科2属,水生昆虫为1科3属,甲壳动物为1科1属;底栖动物的密度变化范围为96～880个/平方米;优势种属是前突摇蚊属(Procladicus)和摇蚊属(Chironomus).运用生物学污染指数(BPI-Biology Pollution Index)来评价大庆水库水质,评价结果表明:BPI指数变化范围为0.73～0.82,水质属于β中污染水体,五年之间的水污染程度变化不明显,而且水质逐年有略微好转的倾向;平水期的水质略好于丰水期的水质.

Investigation and Biological Assessment of Zoobenthos Community in Daqing Reservoir

During 2001 -2005, the biological investigation of zoobenthos was conducted in Daqing reservoir. In total, 4 families 7 genera of zoobenthos were observed, of which, 1 family 1 genus was mollusca, 1 family 2 genera were annelidan, 1 family 3 genera were aquatic insect, 1 family 1 genus was crustacean. The density of zoobenthos ranged from 96 - 880 ind./m^2. The dominant genera were Procladicus genus and Chironomus genus. The water quality of Daqing reservoir was assessed by using BPI i.e. Biology Pollution Index. The results showed that BPI value ranged from 0.73 - 0.82, the water quality of Daqing reservoir belonged to the 13 - type of moderately polluted type, the polluted water level was not obviously different during 5 years, and the water quality of Daqing reservoir turned for the better slightly. In mean - flow period, the water quality was a bit better than that in high- flow period.