巢湖富营养化对轮虫的影响研究

从2002年8月至2003年7月对富营养化的巢湖轮虫进行调查研究。结果表明,巢湖轮虫有48种,轮虫密度为520ind./L,生物量为0.4778mg/L;夏季种类最多,春冬季次之,秋季最少。春、夏季密度较高,生物量春季最高,冬季次之,秋季最低。西区密度是东区的5.2倍,生物量是东区的10.1倍;自东向西,随着富营养化程度的加深,轮虫种类逐渐增多,其现存量与富营养化水平密切相关。该研究将为巢湖水域的污染控制和综合治理提供科学依据。

Effect of Eutrophication on Rotifers in Chaohu Lake

Rotifers of Chaohu Lake was investigated between August 2002 and July 2003. Results showed that there were a total of 48 species of rotifers with average density of 520ind./L and biomass of 0.4778mg/L. There were most species of rotifers in summer, followed by spring and winter, and the least species occurred in autumn. The density was higher in spring and summer whereas the biomass peaked in spring, and the minimum density and biomass occurred in autumn. The density of rotifers in the west lake was 5.2 times that in the east while the biomass was 10.1 times that in the east. With the level of eutrophication getting higher from east to west, rotifers gradually increased in species numbers and both density and biomass were significantly correlated with level of eutrophication. The study will provide scientific basis for control of eutrophication in the Lake.