关键词: 微生态制剂EM, 蓝狐, 生长, 代谢, 免疫机能

Abstract: As a basic work for establishing China ecological criteria of water environment, an investigation was conducted on the metazoan zooplankton community structure and aquatic ecology in the Daliaohe River in June 2011, based on the relevant guidelines. A total of 59 metazoan zooplankton species were recorded, most of which  belonged to Rotifera, occupying 84.75% of the total. The total density of the metazoan zooplankton at different sampling sites varied from 8.63 to 2292.06 ind·L^-1, with an average of 628.97 ind·L^-1 and dominated by rotifers. At all sites, Brachionus and Keratella were the dominant species. A total of 28 species as water pollution indicators were detected, among which, 11 species  belonged to β-mesosaprobic species, occupying 40%. The Shannon index of the metazoan zooplankton community was 2.33-3.93, Margalef index was 2.84-9.42, and Pielou index was 0.59-0.97. Based on this investigation, it was considered that the Daliaohe River was in eutrophic situation and moderate pollution level. As compared with the previous data, the aquatic ecosystem situation of the River was somewhat improved.