基于MSPA和MCR模型的大通县生态网络构建  

Construction of Ecological Network in Datong Based on MSPA and MCR Model

作　　者：何建华[1,2] 郭向天[1] HE Jian-hua;GUO Xiang-tian(School of Resources and Environmental Sciences,Wuhan University,430072,Wuhan,Hubei,China;Key Laboratory of Urban Land and Resources Monitoring and Simulation Ministry of Natural Resources,518034,Shenzhen,Guangdong,China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430072 [2]自然资源部城市国土资源监测与仿真重点实验室,广东深圳518034

出　　处：《特区经济》2022年第4期104-109,共6页Special Zone Economy

基　　金：自然资源部重点实验室开放课题(KF-2020-05-036);国家自然科学基金(41871301)。

摘　　要：本文基于生态学理论,采用形态学空间格局分析(MSPA)方法识别大通县生态源地,并基于MCR模型构建生态廊道,通过图论指数(IIC、PC)对整体及局部连通性进行评价,运用重力模型对生态廊道分级,最后采用生态网络结构指数对生态网络连通性进行评价。结果表明:第一,生态源地规模较大,占研究区面积的51.89%,主要集中分布在大通县的北部和中部两侧。第二,网络闭合度(0.59)、线点率(1.82)、网络连接度(0.74)表明,大通县生态源地连接度较差,生态廊道和生态节点连通性较好,应优先保护重要的生态廊道和节点。Based on the theory of ecology,this paper uses morphological spatial pattern analysis(MSPA)method to identify the ecological source of Datong County,and constructs an ecological corridor based on the MCR model.What’s more,the overall and local connectivity is evaluated by graph theory index(IIC,PC),and the Gravity Model is used to classify the ecological corridors.Finally,the ecological network connectivity is evaluated by the ecological network structure index.The results showed that:First,the scale of ecological source is large,accounting for 51.89% of the study area,mainly distributed in the north and central sides of Datong County.Second,The degree of network closure(0.59),line-point rate(1.82),and network connectivity(0.74) indicate that the ecological source area of Datong County is poorly connected,and the ecological corridors and ecological nodes are well connected.Priority should be given to protecting important ecological corridors and nodes.

关 键 词：形态学空间格局分析(MSPA) 最小阻力模型(MCR) 生态网络 西部河湟谷地 

分 类 号：K909[历史地理—人文地理学]