基于"生态—风险"双重视角下的广西边境城市生态综合网络构建及优化研究OA

Optimizing the integrated ecological network of border cities serves as a critical pathway for advan-cing sustainable development in these regions,holding significant practical importance for safeguarding re-gional ecosystem stability and maintaining international ecological security.Focusing on border cities in Guangxi,this study identified ecological source areas and risk areas from the dual perspectives of ecosystem conservation and ecological risk prevention.It constructed a dual"ecology—risk"network structure to fur-ther screen key areas for ecological protection and restoration,proposing pathways and optimization strategies for building an integrated ecological network.The findings are summarized as follows:①A total of 18 ecolog-ical source areas were identified,including 15 existing areas and 3 newly optimized areas.In addition,6 risk source areas were also identified.These two categories covered 39.20%and 2.12%of total land area of the study area,respectively.②An integrated ecological network was constructed based on the spatial distribution characteristics of ecological elements in the border cities of Guangxi.The ecological network simulation iden-tified 117 ecological corridors:69 existing corridors and 48 optimized new corridors.In addition,14 risk corri-dors were identified.In total,12 Level-1 ecological corridors and 4 Level-1 risk corridors were selected.Addi-tionally,22 protection nodes,9 restoration nodes,and 17 ecological protection and restoration nodes were ex-tracted.③On the basis of the integrated ecological network structure,this study proposes optimization strate-gies for ecological network protection and restoration,including identifying,protecting and restoring key eco-logical nodes,supplementing and optimizing ecological source areas,identifying and restoring ecological frag-mentation points.It constructs an ecological protection and restoration pattern of"two axes—two defenses—four zones"to enhance the comprehensive benefits of border cities.This study provides a scientific basis and practical experience for optimizing ecological networks in border cities and international ecological security networks.