摘要:中-老交通走廊建设在促进中国与东盟国家互联互通的同时，也会对区域生态安全造成巨大压力；构建生态廊道对于修复破碎景观、保护生物多样性具有十分重要的意义。基于"源地-廊道-节点"的研究框架，结合生态系统服务、景观连通性和生态敏感性3个指标划分生态斑块等级，综合考虑生态斑块等级和中-老交通走廊核心区重点保护物种活动特性识别重要生态源地，利用DMSP/OLS夜间灯光数据改进基于地类赋值的基本生态阻力系数，运用最小累积阻力模型判定生态廊道走向，并结合水文分析方法和Google Erath判定关键生态节点。研究表明：①中-老交通走廊核心区生态源地面积为20243.74 km²，占研究区总面积的14.13%，以林地、灌木为主要土地覆被类型，主要分布在云南省的普洱市以及老挝的琅南塔省和乌多姆塞省。②生态廊道总长度为3645.81 km，其中关键廊道长度为1397.78 km，主要分布在普洱市和乌多姆塞省，生态廊道与生态源地大致构成了一个环形闭合区域，能够有效促进生物物种迁徙和物质能量交流。③关键生态节点中战略点有5处，断裂点有9处，暂歇点有16处。



Abstract:With the deepening of "The Belt and Road" strategy, the construction of China-Laos transportation corridors marked by China-Laos Railway and Kunming-Bangkok Road are developing rapidly. The construction of China-Laos transportation corridors can promote cooperation and communication between China and other ASEAN countries. Nevertheless, they may have the negative influence on regional landscape pattern, functions, services, biodiversity, and the migration of species. The ecological corridors have many service functions at different landscape scales, such as slowing down soil erosion, fixing sand and preventing flood, and maintaining biodiversity. Therefore, the construction of ecological corridors and identification of key nodes are of great significance for the restoration of the broken landscape in the core area of China-Laos transportation corridors and the protection of regional ecological security. Based on research framework of "source-corridor-node", we divided ecological patches according to three indexes:importanceof ecosystem services, landscape connectivity,and ecological sensitivityin the core area of China-Laos transportation corridors. Furthermore, we identified important ecological sources on the basis of the level of ecological patches and the activity characteristics of key protected species. We used the minimum cumulative resistance model to identify the ecological corridors, and used the hydrological analysis method and Google Earth to determine the key ecological nodes. The results illustrated that the area of ecological sources was 20243.74 km², which accounted for 14.13% of the total area. The main land cover types of ecological sources were woodland and shrub,which were mainly distributed in Pu'er city,Louang Namtha Province,and Udomxai Province. The total length of the ecological corridors was 3645.81 km, of which the key corridors was 1397.78 km, mainly distributed in Pu'er city and Udomxai Province.The ecological corridors and ecological sources constituted an annular closed area, which would effectively promote the migration of biological species and the exchange of material and energy. Among the key ecological nodes, there were 5 strategic nodes, 9 breaking nodes, and 16 pause nodes.





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