【摘要】 城市化引发诸多环境问题，如何协调城市建设空间与生态空间的矛盾，已成为中国国土空间规划领域的重大课题之一。确定区域生态安全格局，优化生态廊道是国土空间规划的重要步骤，也是后续开展生态保护和恢复的关键，如何科学识别显得尤为重要。该文以粤港澳大湾区为例，综合考虑自然资源本底条件和关键生态环境问题，基于生态系统功能重要性和生态系统敏感性评价识别生态源地，利用最小累积阻力模型识别生态廊道，构建区域生态安全格局。基于生态系统重要性和生态敏感性评价结果修正重力模型，并结合廊道连通性指数，进一步识别重要生态廊道。结果显示，生态源地面积为20 371km~2，占区域总面积的36.7%，主要位于北部林地广布的山地丘陵区、自然保护区和港澳郊野公园。由于城市化快速发展，污染水平高，生态服务供给低，研究区中部不存在或仅存在较少生态源地。区域内共有潜在生态廊道36条，总长2 300 km，呈东西两侧环绕式分布。廊道分级结果显示，高重要-低连通廊道最多（22条），其次是低重要-低连通（6条）和低重要-高连通廊道（5条），高重要-高连通廊道最少（3条）。针对不同类别的廊道，建议因地制宜地采取措施进行保护和管理。更多还原

【Abstract】 Urbanization has caused many environmental problems.How to coordinate the contradiction between urban construction space and ecological space has become an important issue in urban planning in China.Identifying regional ecological security patterns and prioritizing ecological corridors are significant steps for land space planning and critical for ecological protection and restoration.In this study,we took Guangdong-Hong Kong-Macao Greater Bay Area as an example and considered both ecological background and key environmental issues of the study area for attribute analyses.We identified the ecological security pattern in terms of ecological sources by combining the assessment of ecosystem functions and ecological corridors using a minimum cumulative resistance model.We modified a gravity model based on the ecosystem functional importance assessment and prioritized the ecological corridors by combining revised gravity model and modified corridor connectivity indices.We found that the total area of ecological sources was20 371 km~2,accounting for 36.7%of the study area,mainly located in the northern part of mountainous and hilly areas with extensive woodlands,nature reserves,and Hong Kong and Macau national parks.Cities in the central part of the studied area,such as Dongguan,Foshan,and Guangzhou,hardly had any ecological sources due to rapid land urbanization,high pollution levels,and low ecological service supply.There were 36 ecological corridors in the study area with a total length of 2 300 km and were peripherally distributed around the east and west parts of the region.Corridor priority grading results showed that the number of high importance-low connectivity corridors was the highest (22),followed by low importance-weak connectivity (6) and low importance-strong connectivity corridors (5),and high importance-strong connectivity corridors were the fewest (3).For different types of corridors,targeted protection and management measures should be adopted according to their local conditions.更多还原