RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2015, Vol. 24 >> Issue (12): 2069-2075.doi: 10.11870/cjlyzyyhj201512010

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LANDSCAPE CHANGE AND HUMAN DRIVE IN SOUTH DONGTING LAKE WETLAND AS A FISH HABITAT

LI Min1, ZHANG Can-ming2, LI Jiao1, DENG Xue-jian1   

  1. 1. College of Tourism Hunan Normal University, Changsha 410081, China;
    2. ASEM Water Resources Research & Development Center, Changsha 410013, China
  • Received:2015-02-25 Revised:2015-05-18 Online:2015-12-20

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Abstract: Through field investigation and map analysis, this research studied the changes of landscape pattern and human drive of Wanzi Lake Wetland, a part of South Dongting Lake, as a fish habitat during 1983 to 2013.The results showed that the beach area increased from 1.410×104 hm2 to 2.135×104 hm2, water area decreased from 1.363×104 hm2 to 0.631×104 hm2, reed land decreased, while woodland increased from 0.056×104 hm2 to 0.728×104 hm2 and extended into the core protection area, and there is a large increase in the number of fishery facilities and channels.Human disturbance have a great influence on landscape.Plantation of Italian Poplar and reed changed the terrain and pattern of community and seized the original natural grassland, which reduces fish spawning and baiting' s suitable habitat.Mud enclosure, as one of the harmful fishing facilities, now remains in developing stage, just like the enclosure fishery facility.These fishing facilities occupied the good position on grassland and low beach, harmful to fish spawning and baiting.The construction of silt diverting canal caused the lake silt up rapidly, turn aquatic landscape to amphibious landscape and exposure to terrestrial landscape.As a result, fish habitat is compressed.However, in the meantime, the silt diverting canals keep diverting mud out of the core area of South Dongting Lake nature reserve.

Key words: South Dongting Lake, wetland, landscape pattern, habitat, human disturbance

CLC Number: 

  • P289
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