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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (1): 125-135.DOI: 10.7522/j.issn.1000-694X.2019.00037

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Community structure and biodiversity of zoobenthos in Heihe River Basin

Wang Yu1,2, Liu Juanjuan1, Feng Qi2, Liu Xiande3, Wang Zhijun1, Guo Yamin1, Kong Dexing1   

  1. 1. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2. Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. Academy of Qilian Water Resource Conservation Forests Research Institute, Zhangye 734000, Gansu, China
  • Received:2019-01-24 Revised:2019-06-06 Online:2020-01-20 Published:2020-01-18

Abstract: The community structure and biodiversity of zoobenthos in the upper and middle reaches of Heihe River were investigated in August 2018. The results showed that 43 species of zoobenthos were collected, The results showed that 43 species of zoobenthos were collected, including 34 species of arthropods, 7 species of mollusks and 2 species of annelids. The dominant species were Tipulidae, Damselfly, Argyroneta, Radix auricularia, Suecinea sp., Gyraulus albus. The average density and biomass of zoobenthos were 76.94 ind·m-2 and 3.74 g·m-2, respectively. There were obvious spatial differences in the existing amount of zoobenthos. The existing amount of zoobenthos in the main stream (1 032 ind·m-2, 60.0963 g·m-2) was larger than that in the tributaries (276 ind·m-2, 3.5233 g·m-2). According to Sorensen similarity index analysis, the community composition of zoobenthos in different habitats has spatial differences. and zoobenthos in the main stream (36 species) are obviously richer than those in the tributaries (15 species). Cluster analysis showed that the relatively abundant cattle tendons, Xiaogushan, Longqu, Wetland Park, Zhangye Heihe Bridge, Gaoya, Luocheng and Zhengyixia sampling points were clustered into one group, while the remaining points were clustered into one group. According to Carlander's biomass index, the water quality in the upper and middle reaches of Heihe River was in a middle nutritional state, in which the tributaries were at a low nutritional level and the mainstream was at a middle nutritional level.

Key words: Heihe River Basin, zoobenthos, biological index, community structure, biodiversity

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