基于生态系统服务供需的水网乡村生态安全格局构建

Optimization of Ecological Security Pattern in Water⁃Networked Villages Based on Supply⁃Demand Relationship of Ecosystem Services

水网乡村生态安全格局的构建对维持生态系统的可持续发展有着重要的现实意义。文章选取苏州吴江区的同字荡片区为典型案例地,运用APH法及矩阵分析建立指标评价体系,对生态系统服务供需的空间匹配情况进行评估。结果显示,较多区域存在供需不匹配现象,生态系统服务面临供需失衡且空间错位的突出问题。在此基础上,确定片区生态源地,并借助最小累积阻力模型识别出各源地之间、源地与需求地之间的生态廊道,以构建片区的生态安全格局,提高生态系统服务稳定性。

Optimizing the ecological security pattern in water networked rural area is of practical significance for maintaining the sustainable ecosystem development.This paper selects Tongzidang area in Suzhou to assess the spatial matching of supply and demand of ecosystem services using the indicator⁃based evaluation system which is established based on APH and matrix analysis.The results show that there is a mismatch between supply and demand in many regions,and ecosystem services are challenged with the prominent problems of supply⁃demand imbalance and spatial dislocation.On the basis of the matching analysis,the paper determines the ecological source areas and identifies the ecological corridors between the source areas and between the source areas and the demand areas by using the minimum cumulative resistance model.It is aimed at optimizing the ecological security pattern of the area and improving the stability of ecosystem services.