RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2017, Vol. 26 >> Issue (03): 461-470.doi: 10.11870/cjlyzyyhj201703017

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THE VARIANCE ANALYSIS OF CHARACTERISTICS AND BLOOMS OF THE TYPICAL TRIBUTARIES OF THE THREE GORGES RESERVOIR IN SPRING

HUANG Ya-nan1, JI Dao-bin1, LONG Liang-hong1, LIU De-fu2, SONG Lin-xu1, SU Qing-qing1   

  1. 1. College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;
    2. Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China
  • Received:2016-08-02 Revised:2016-12-27 Online:2017-03-20
  • Supported by:
    Project supported by the National Basic Research Program of China (2014CB460601);Project supported by the National Science and Technology Cooperation and Communication Program of China(2014DFE70070);Project supported by the Young Scientists Fund of the National Natural Science Foundation of China(51509086);Major Science and Technology Program for Water Pollution Control and Treatment (2014ZX07104-005-01、2014ZX07104-005-02)

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Abstract: In order to understand the fish diversity and the community structure in Northwest Hubei, investigation was carried out in Baguashan, Duheyuan, Yerengu, Nanhe, Wudaoxia and Zhangheyuan nature reserves in Northwest Hubei from 2007 to 2012. We recorded 79 species, belonging to 4 orders,15 families and 51 genera. Among all the species, order Cypriniformes was the most dominant component (70.89%), with 56 species recorded. Feeding diets and ecological groups of fish were similar among the six nature reserves. Carnivorous and omnivorous fish were most abundant, and herbivorous fish were among the minority. Limnophilic fish was far more than diadromous and rheophilic species. The Margalef index (D) at Duheyuann natural reserve was the largest, with a value 2.60, whereas the lowest D was found at Baguashan natural reserve (0.91). The diversity index showed that the nature reserves in the same drainage system had a low βc index and βR index than those between different drainage systems. The index of similarity (Cj) was high between the natural reserves in the same drainage system and low between different drainage systems, explaining well the fact that the nature reserves in the same drainage system has the continuity of the geographical environment while the nature reserves between different drainage systems existed the geographical isolation. The hydropower development and overfishing are the greatest threat to the region fish. It is suggested to strengthen the fishery management and establish artificial fish breeding sites, to reduce the negative effects of water-power engineering and restore natural fishery resources.

Key words: Three Gorges Reservoir (TGR), typical tributary, physical and environmental characteristics, dominant algae

CLC Number: 

  • X524
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