Construction of Ecological Safety Network and Identification of Key Areas for Ecological Restoration in Resource-Based Cities-Take the Liuzhi Special Zone in Guizhou Province as an example

Zhimou Yang; Junning Zheng; Wei Fang; Ming Wan

doi:10.6911/WSRJ.202408_10(8).0008

Authors

Zhimou Yang
Junning Zheng
Wei Fang
Ming Wan

DOI:

https://doi.org/10.6911/WSRJ.202408_10(8).0008

Keywords:

Ecological security network; Circuit theory; MSPA; Ecological restoration; Resource-based city.

Abstract

Constructing an ecological safety network is an effective measure to coordinate ecological protection and economic development in resource-based cities. Taking Liuzhi Special Zone as an example, the study adopts MSPA, ecological protection red line, and other multi-factor superposition to identify ecological source areas, integrates human and natural environmental impacts to construct resistance surfaces, and applies the circuit theory to extract ecological corridors and ecological nodes, which provides a comprehensive framework for building an ecological safety network. The results showed that 17 ecological sources (371.51 km²) and 33 ecological corridors (163.92 km) constitute the ecological safety network in the study area, and 22 ecological pinch points (2.80 km) and 25 ecological obstacles (6.81 km) are the key areas for ecological protection and restoration in the study area. The results show that the ecological source areas are concentrated in the western and southern parts of the study area, adjacent to the mining area, which are strongly disturbed by human activities. The first- and second-level ecological sources are concentrated in clastic rock areas such as clay rock, sandstone, and siliceous rock in the west of the study area. The third-level ecological source is scattered in the southern region, dominated by dolomite, limestone, and other carbonate rocks. Ecological corridors connect discrete ecological sources in series. The first- and second-level ecological corridors are mainly distributed in the western part of the study area. The road networks and land types on both sides of the corridors are staggered, and geological disasters are dense. Based on regional characteristics, this paper proposes feasible ecological restoration strategies, which can provide scientific reference for the spatial layout of ecological security protection and ecological restoration measures in resource-based cities.

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