Time-space Evolutionary Characteristics of Ecological Sensitivity in Gannan Tibetan Autonomous Prefecture
Yuhan Wei
Guofeng Dang
DOI: https://doi.org/10.59429/pest.v5i1.1752
Keywords: Ecological Sensitivity; Coefficient of Variation; Time-Space Analysis; Gannan Tibetan Autonomous Prefecture
Abstract
Research on ecological sensitivity shares an important role in carrying out regional ecological civilization construction and advocating regional ecological sustainable development. In this paper where Gannan Tibetan Autonomous Prefecture is taken as an example, nine factors are selected from two aspects of the ecosystem and social system and the time-space changes of ecological sensitivity in Gannan Tibetan Autonomous Prefecture from 2000 to 2020 are analyzed by using the coefficient of variation method and cumulative model with the support of GIS. As demonstrated by the results, (1) the research area as a whole proves to be moderate in ecological sensitivity. By 2020, highly and extremely sensitive areas in the research area had decreased by 4435.68 km2 while those insensitive and mildly sensitive areas increased by 213.1 km2. The areas with high ecological sensitivity are mainly distributed in Xiahe County in the north of the research area, as well as in the north of Hezuo City and Zhuoni County, and the areas with low ecological sensitivity are mainly located in Diebu County and Zhouqu County in the southeast of the research area. (2) The ecological sensitivity of Gannan Tibetan Autonomous Prefecture has been fluctuating in the past 20 years, and the fluctuation enhancement area is mainly distributed in the southern part of Xiahe County and the central part of Zhuoni County, accounting for 25.86% of the total area of the research area. All these analyses and conclusions can provide a basic scientific basis for ecological protection in Gannan Tibetan Autonomous Prefecture.
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