基于MCR和HY模型的莆田市生态廊道构建与优化

Construction and Optimization of Ecological Corridor Based on MCR and HY Analysis in Putian

以莆田市主城区为例,采用形态学空间格局方法(MSPA)结合景观连通性分析筛选重要生态源地,运用最小累积阻力模型(MCR)与重力模型方法,提取研究区潜在生态廊道;同时结合水文分析模型(HY)识别研究区辐射廊道和生态节点,最终构建并优化莆田市生态廊道。结果表明:基于MSPA与景观连通性指数,共识别出14个核心源地;采用MCR与重力模型,共识别出29条廊道,一级廊道7条,二级廊道10条,三级廊道12条;结合水文分析法共识别出205条辐射廊道和53个生态功能节点,包括一级节点5个,二级节点17个,三级节点31个,确定各类型生态修复的关键区域,提取生态节点建设策略。本研究可为莆田市生态廊道构建及生态节点保护时序性研究提供科学依据。

In this study,taking the main urban area of Putian City as an example,the morphological spatial pattern approach(MSPA) combined with landscape connectivity analysis is used to screen important ecological source sites,and the minimum cumulative resistance model(MCR) and gravity model approach are applied to extract potential ecological corridors in the study area,while the hydrological analysis model(HY) is combined to identify radiation corridors and ecological function nodes in the study area,and finally construct and optimize ecological corridors in Putian City.The results show that based on MSPA and landscape connectivity index,a total of14 core source sites were identified;using MCR and gravity model,a total of 29 corridors were identified,including 7 primary corridors,10 secondary corridors and 12 tertiary corridors;combined with the hydrological analysis method,a total of 205 radiating corridors and 53 ecological function nodes were identified,including 5 primary nodes,17 secondary nodes and 31 tertiary nodes.key areas for various types of ecological restoration were identified.Ecological node construction strategies were extracted..The results of this study provide a scientific basis for the study of ecological corridor construction and ecological node protection temporality in Putian City.