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Metazoan zooplankton community structure and aquatic ecology of Daliaohe River, North China in summer.

WANG Lu-lu1, DONG Fang1, LI Fang-fang1, DUAN Meng1, ZHU Lin1,2,3**   

  1. (1College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
    2Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tiangjin 300071, China;
    3Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tiangjin 300071, China)
  • Online:2013-02-10 Published:2013-02-10

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.