基于MSPA与MCR的生态网络构建与优化——以吉安市吉州区为例

Construction and optimization of ecological network based on MSPA and MCR-Taking Jizhou District of Ji'an City as an example

由“生态源地−廊道−节点”构成的生态网络是改善景观破碎化、维持生态系统稳定性的有效策略。在景观连通性的基础上,综合运用形态学空间格局分析(MSPA)与最小累积阻力模型(MCR)方法进行生态网络的构建。以吉安市吉州区作为研究区域,构建生态网络,并结合生态资源现状优化绿地空间布局。研究提取出核心区面积127.24 km^(2),占自然景观总面积的46.15%;桥接区面积48.49 km^(2),占自然景观面积的17.59%;提取出38条一级生态廊道,23条二级生态廊道,主要分布在北部和西北部。研究还提出“一城、一心、两带、三段、多廊道、多节点”的结构优化体系,以保护西北和北部生态资源,控制重点区域的发展。研究结果试图为吉州区的生态系统保护提供一定参考。

The ecological network composed of"ecological source-ecological corridor–stepping stone"is an effective strategy to improve the landscape fragmentation and maintain the ecosystem stability.Based on the landscape connectivity,the Morphological Spatial Pattern Analysis(MSPA)and Minimal Cumulative Resistance model(MCR)are used to construct the ecological network in this study.Taking Jizhou District of Ji'an City as the research area,the ecological network is constructed and the layout of green space is optimized according to the current situation of ecological resources.The extracted core area is 127.24 km^(2),accounting for 46.15%of the total natural landscape area.The bridging area is 48.49 km^(2),accounting for 17.59%of the natural landscape area.38 primary ecological corridors and 23 secondary ecological corridors are extracted,mainly distributed in the north and northwest.In addition,a structural optimization system of"one city,one heart,two belts,three sections,multiple corridors and stepping stones"is also proposed to protect the ecological resources in the northwest and north,and control the development of key areas.The study aims to provide some references for the ecosystem protection in Jizhou district.