基于MSPA-Linkage Mapper的福州滨海长乐区生态网络构建与优化

Construction and Optimization of Ecological Network Based on MSPA-Linkage Mapper In the Changle District,Fuzhou

构建生态网络是改善城市生态环境和维持生态服务功能的重要举措。以福州市长乐区为例,基于形态空间格局(MSPA)、Linkage Mapper和重力模型提取各级潜在生态廊道及生态节点,构建并优化长乐区生态网络。结果表明:1)基于MSPA识别出所有景观类型,核心区面积最大(245.36 km^(2)),占所有景观类型的73.61%,结合核心源地连通性评价,筛选出11个核心生态源地;2)通过Linkage Mapper、重力模型提取研究区潜在生态廊道共32条,1级廊道11条,2级廊道10条,3级廊道11条,主要分布在研究区南北部纵向连接,尚未形成整体的网络连接;3)采用Barrier Mapper、Pinch point综合识别生态节点,1级生态节点17个,2级生态节点12个、3级生态节点8个,确定各类型生态修复关键区域,提出生态暂歇点建设策略。研究结果为长乐区域生态可持续发展及建设生态保护重点区时序性研究提供参考意义。

Rapid urbanization intensifies the fragmentation of landscape.The construction of ecological network is an important measure to improve the urban ecological environment and maintain the ecological service function.Taking the Changle District of Fuzhou as the research area,and potential ecological corridors and ecological nodes at all levels were extracted based on morphological spatial pattern(MSPA),Linkage Mapper and gravity model,and the ecological network of the district was constructed and optimized.The results were as follows 1)all landscape types were identified based on MSPA,and the core area was the largest(245.36 km^(2)),accounting for 73.61%of all landscape types.Combined with the evaluation of the connectivity of core sources,11 core ecological sources were screened out.2)There were 32 potential ecological corridors in the study area extracted through Linkage Mapper and gravity model,including 11 first-level corridors,10 second-level corridors,11 thrid-level corridors which were mainly distributed in the north and south of the study area and connected longitudinally,without forming an overall network connection.3)Using Barrier Mapper and Pinch point to comprehensively identify ecological nodes,including 17 first-level ecological nodes,12 second-level ecological nodes,and 8 third-level ecological nodes,key areas for various types of ecological restoration were determined,and ecological break point construction strategy was proposed.The research results provide reference significance for the chronological research on the sustainable ecological development of the Changle region and the construction of key ecological protection areas.