基于MCR模型的漓江流域生态安全格局构建  

Ecological security pattern construction in Lijiang River basin based on MCR model

作　　者：杨帅琦 何文[2] 王金叶 李何英 姚月锋[2] YANG Shuai-qi;HE Wen;WANG Jin-ye;LI He-ying;YAO Yue-feng(College of Tourism&Landscape Architecture,Guilin University of Technology,Guilin 541006,China;Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain,Guangxi Institute of Botany,Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences,Guilin 541006,China;Nanning College of Technology,Nanning 543000,China)

机构地区：[1]桂林理工大学旅游与风景园林学院,广西桂林541006 [2]广西壮族自治区中国科学院广西植物研究所,广西喀斯特植物保育与恢复生态学重点实验室,广西桂林541006 [3]南宁理工学院,广西南宁530000

出　　处：《中国环境科学》2023年第4期1824-1833,共10页China Environmental Science

基　　金：广西重点研发计划项目(AB22035060);国家自然科学基金资助项目(32060369);广西科学院基本科研业务费资助项目(CQZ-D-1904)。

摘　　要：以典型喀斯特地貌的漓江流域为研究单元,基于景观生态风险度和景观连通性指数提取生态源地,在最小累计阻力模型和重力模型的帮助下识别潜在生态廊道和潜在生态节点并进行赋级,最终结合流域山水林田湖草沙一体化治理工程构建区域生态安全格局.结果表明:①流域景观生态风险呈“中部南部高、东部北部低”的空间特征,较高、高风险区占流域面积43.34%.②流域内存在5个生态源地,主要为林地和自然保护区,总面积达1689.05km^(2),占流域总面积28.99%.③识别潜在生态廊道6条和潜在生态节点38个,集中分布在灵田镇附近.④参考生态阻力面和未来规划,构建漓江流域为“生态保育、修复、管控一体,廊道带建设并行”的生态网络格局;此外为保证廊道带的顺利建设,在区县尺度上对灵川、兴安两地给予更多的生态补偿资金及技术支持.研究可为漓江流域生态系统功能提升及国土空间保护修复提供科学指导.The construction of ecological safety network system plays a critical role in ecological protection and restoration for people's welfare and national security.In order to construct a better ecological security pattern,we took the Lijiang River basin with typical karst landforms as a research example,to extract ecological source sites with landscape ecological risk and connectivity indices,to identify and grade the potential ecological corridors and nodes with the minimum cumulative resistance and gravity models,and finally to construct the regional ecological security pattern in a coordinated way the conservation of Mountains-Rivers-Forests-Farmlands-Lakes-Grasslands-Deserts ecosystem.The results showed that:(1)The ecological risk of the Lijiang River basin was characterized as high in the center and south,and low in the east and north.The high and higher risk areas accounted 43.34%of the total watershed area.(2)There were five ecological source areas,mainly located in forests and nature reserves,accounting for 28.99%(1689.05km^(2))of the total watershed area.(3)Six potential ecological corridors and 38 potential ecological nodes were identified,which were concentrated in the vicinity of Lingtian town.(4)The Lijiang River basin was constructed as a protective pattern of ecological conservation,restoration,control,and corridor construction.In addition,more ecological compensation funds and techniques should be supported to Lingchuan and Xingan counties in order to ensure the successful construction of the corridor.We hope this study could provide scientific knowledge for improving the ecosystem function of the Lijiang River basin and the successful implementation of national land use plan.

关 键 词：景观生态风险评估 生态安全格局 最小累计阻力模型(MCR模型) 喀斯特 漓江流域 

分 类 号：X171.1[环境科学与工程—环境科学] X321