Ecological spatial restoration in Gannan Prefecture based on the coupling of ecological security pattern and ecological problems

Abstract

 Ecological fragmentation, resource depletion, soil erosion and other problems have a significant impact on the ecosystem. Ecological restoration helps to maintain and enhance the service function of the ecosystem. How to fully implement territorial space restoration and maintain regional sustainable development is a key issue in the identification and construction of ecological space restoration. Taking Gannan Tibetan Autonomous Prefecture as the research object, this paper discusses the ecological spatial restoration strategy under the coupling of ecological security pattern and ecological problems. Firstly, ecological remote sensing index and morphological spatial pattern analysis were used to identify ecological sources, ecological resistance surfaces and ecological corridors, and then the ecological security pattern was constructed. At the same time, based on the concept of "mountain, water, forest, farmland, lake, grass and sand", ecological problem areas are identified by constructing ecological problem index (EPI). Then the spatial superposition coupling and regional coordination coupling are carried out between the ecological security pattern and the ecological problem region. Finally, the paper puts forward a multi-directional restoration strategy of "point-line-plane", including ecological source protection, ecological corridor construction and ecological problem area restoration, in order to promote the ecological sustainable development of Gannan Prefecture.