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| Change of Landscape Patterns in a Cold Oasis in Arid Zone |
| Li Xiumei, Bai Tao |
| Forest Ecological Department, Hubei Ecology Vocational College, Wuhan 430200, China |
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Abstract The dynamic mechanism of cold oasis landscape is an important section and supplement for best understanding regional environmental change. Minle County, a representativeness of the cold oasis in the arid zone, located in northern slope or Qilian Mountain, plays an important role of ecological function in the Heihe River Basin. We analyzed landscape change mechanism by employing the landscape structure analysis method in 1987, 1995, 2000, and 2005 based on TM data. Cropland was a dominant landscape type in the cold oasis and, the cropland patch area occupied 28.6%-34.6% of total area during study period. Three was significant conversion between cropland and grassland patches among landscape types and, ratio was 43.6% form cropland to grassland and 72.9% from grassland to cropland, respectively. Comparing to the plain oasis landscape characteristic in the Heihe Basin, the cropland patch area increased more quickly in the cold oasis. For landscape change ratio, the water and the residential area that areas were least had highest values, this indicated that they impacted by the seasonal change of river hydrological and the continued urbanization process, respectively.
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Received: 18 April 2013
Published: 20 May 2014
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2014, Vol. 34 
