基于空间分类系统的生态网络构建与优化研究——以巢湖流域为例

Research on Ecological Network Construction andOptimization Based on Spatial ClassificationSystem:Taking Chaohu Basin as an Example

快速无序的城市化导致了区域生境斑块间生态联系的退化,生态网络对城市因快速发展而中断的生态过程的恢复具有重要作用。以巢湖流域为例,引入了空间分类系统,综合运用形态空间格局分析、景观连通性分析、最小累积阻力模型、重力模型和电流理论等方法进行生态网络的构建与优化。研究表明:优化后的巢湖流域生态网络由24个生态源地、57条生态廊道和30个生态节点组成,生态源地总面积为3036.58 km 2,生态廊道总长度为2134.30 km,形成了“一湖八核三带联动、三纵多点蓝绿交织”的结构布局。优化后的巢湖流域生态网络的网络闭合度、点线率、网络连接度分别提升了13.55%、31.62%、9.36%。

Rapid and disorderly urbanization has led to the degradation of ecological connections between regional habitat patches,and ecological networks play an important role in restoring ecological processes interrupted by rapid urbanization.Taking Chaohu Basin as an example,this paper introduced spatial classification system based on considerations for manual development,ecological network construction and optimization which are comprehensively carried out using methods such as morphological spatial pattern analysis,landscape connectivity analysis,minimum cumulative resistance model,gravity model,and current theory.Research has shown that the ecological network of Chaohu Basin after optimization consists of 24 ecological source areas,57 ecological corridors and 30 ecological nodes,with a total area of 3036.58 km 2 and a total length of 2134.30km,forming a structural layout of"one lake,eight cores,and three belts linked together,with three vertical and multiple blue-green interweaving points"will be formed.The network closure,point-line rate,and network connectivity of ecological network in Chaohu Basin after optimization respectively increase 13.55%,31.62%,and 9.36%.