Spatio-Temporal Evolution of Key Areas of Territorial Ecological Restoration in Resource-Exhausted Cities: A Case Study of Jiawang District, China
Author:
Wang Fengyu1, Tong Shuai2ORCID, Chu Yun1, Liu Tianlong1, Ji Xiang3
Affiliation:
1. School of Architecture and Design, China University of Mining and Technology, Xuzhou 221116, China 2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China 3. Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221000, China
Abstract
Resource-exhausted cities usually face problems of environmental degradation, landscape fragmentation, and impeded ecological mobility. By clarifying the spatial heterogeneity of ecological restoration needs, efficient and coordinated ecological protection and restoration can be carried out. This study selected Jiawang District, a typical resource-exhausted city, and constructed an ecological security evaluation framework to determine the ecological source area from the three aspects of ecosystem service importance, ecological sensitivity, and landscape stability. The resistance surface was corrected with ecological sensitivity evaluation data, and ecological corridors and ecological nodes were identified using circuit theory. Finally, it explored the spatial and temporal evolution of the key areas of territorial ecological restoration in Jiawang District. This study indicates that: (1) In 2000, 2010, and 2020, the ecological source areas were 123.59 km2, 116.18 km2, and 125.25 km2, and the corresponding numbers of ecological corridors were 53, 51, and 49. The total lengths of the ecological corridors were 129.25 km, 118.57 km, and 112.25 km, mainly distributed in the northern and central areas of the study area. (2) The study area contained 17, 13, and 19 ecological pinch points in 2000, 2010, and 2020, respectively, 16, 20, and 15 ecological obstacle points, and 8, 24, and 33 ecological fracture points, respectively. Targeted rehabilitation of these key areas can significantly improve ecological connectivity. (3) The key area of territorial ecological restoration in 2020 was composed of 125.25 km2 ecological source area, 8.77 km2 of ecological pinch point, 12.70 km2 of ecological obstacle point, and 33 ecological fracture points. According to the present situation of land use, protection strategies are put forward.
Funder
National Key Research and Development Program of China Major Research Fund Project of Jiangsu Building Energy Conservation and Construction Technology Collaborative Innovation Center Graduate Innovation Program of China University of Mining and Technology Postgraduate Research and Practice Innovation Program of Jiangsu Province
Subject
Nature and Landscape Conservation,Ecology,Global and Planetary Change
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