水土保持通报2024，Vol.44Issue(3)：145-158,14.DOI:10.13961/j.cnki.stbctb.2024.03.016
基于景观生态风险评价的湘江流域生态安全格局构建
Construction of an Ecological Security Pattern in Xiangjiang River Basin Based on Landscape Ecological Risk Assessment
摘要
Abstract
[Objective]A landscape ecological risk assessment for Xiangjiang River basin were conducted,and an ecological security pattern were established,in order to provide guidance for the implementation of regional ecological conservation and restoration efforts in the area.[Methods]Eleven indicators were selected from the three perspectives of natural environment,human society,and landscape pattern to construct Xiangjiang River basin landscape ecological risk evaluation indicator system.Based on this system,spatial principal component analysis was applied to evaluate the landscape ecological risk,and then,a comprehensive ecological resistance surface was constructed.The InVEST model,morphological spatial pattern analysis,and landscape connectivity analysis were combined to identify ecological sources.Circuit theory was then applied to identify ecological corridors,ecological pinch points,and barrier points area.[Results]① Human society had the greatest impact on the landscape ecological risk of Xiangjiang River basin.Areas of high landscape ecological risk extended outward from multiple high-value centers located in urban agglomerations and various prefecture-level cities,while areas of low landscape ecological risk were primarily located in the southeastern and southern forest regions.② A total of 32 ecological sources were identified,covering an area of 20 415.89 km2,accounting for 22％of the total basin area,and 64 ecological corridors were identified with a total length of 1 888.25 km.50 ecological pinch points and 41 ecological barrier points were identified,accounting for 0.8％and 0.6％of the total basin area.③ Ecological protection areas,ecological improvement areas,ecological restoration areas,and critical ecological areas were delineated,with different ecological protection and optimization measures formulated.[Conclusion]Rationalizing ecological security patterns is crucial for the sustainable development of the eco-economy.Based on a landscape ecological risk analysis of Xiangjiang River basin,corresponding measures and policies should be adopted for ecological source areas,ecological corridors,and key nodes to carry out ecological restoration and protection to maintain ecological security.关键词
生态安全格局/生态风险/电路理论/主成分分析/InVEST模型/湘江流域Key words
ecological security pattern/ecological risk/circuit theory/principal component analysis/InVEST model/Xiangjiang River basin分类
环境科学引用本文复制引用
邓楚雄,龚雅菁,张光杰,刘唱唱,王雨欣..基于景观生态风险评价的湘江流域生态安全格局构建[J].水土保持通报,2024,44(3):145-158,14.基金项目
国家自然科学基金"水生态系统服务流网络对流域'三生'空间博弈变化的响应研究"(42171258) （42171258）
湖南省自然资源厅科技项目(20230110GH) （20230110GH）
