基于电路理论的金寨县生态安全格局构建

Construction of ecological security pattern based on Circuit Theory in Jinzhai County

构建生态安全格局对保护及修复国土生态空间、保障区域生态安全、应对突发公共卫生事件等有着重要意义。论文以金寨县为例,将土壤保持、碳固定、水源涵养三项生态系统服务作为提取生态源地的指标,借助InVEST模型中生境质量构建阻力面,最后基于电路理论构建金寨县生态安全格局。结果表明:金寨县生态安全格局由19个生态源地、28条关键廊道、2条潜在廊道、15个夹点、16个障碍点构成,呈“三横三纵”网络状较均匀地分布在县域内。生态源地集中分布在县域南部与山脉河流所处的区域,主要由林地、园地等组成。建设用地范围内较弱的生态系统服务显示了人类活动对生态安全的威胁。研究结果对平衡金寨生态保护与经济发展压力之间的关系具有重要意义,基于电路理论构建安全格局为生态保护与修复提供了新的技术路径。

Establishing an ecological security pattern is of great significance for protecting and restoring national ecological space,ensuring regional ecological security,and responding to public health emergencies.Taking Jinzhai County as an example,three ecosystem services of soil conservation,carbon fixation,and water conservation were used as indicators for extracting ecological sources.The habitat quality module in the InVEST model was used to construct the resistance surface.Finally,the ecological security pattern of Jinzhai County was constructed based on circuit theory.The results show that the ecological security pattern of Jinzhai County is composed of 19 ecological sources,28 key corridors,2 potential corridors,15 pinch points,and 16 obstacle points.The ecological source areas are concentrated in the south of the county and the area where the mountain rivers are located.They are mainly composed of forest land and garden land.Weak ecosystem services within the scope of construction land show the threat of human activities to ecological security.The results are of great significance for balancing the relationship between Jinzhai ecological protection and economic development pressure.Constructing a security pattern based on circuit theory provides a new technological path for ecological protection and restoration.