基于生态系统健康的国土空间生态修复分区——以长江中游城市群为例

高强度社会经济活动造成了河湖湿地萎缩、景观破碎化与生物多样性减少等生态问题，实施国土空间生态修复成为生态环境治理的必然途径。以长江中游城市群为研究区，基于网格单元构建“生态系统活力—生态系统组织力—生态系统弹性—生态系统服务力”（VORS）模型，评价2010年和2020年的生态系统健康水平。通过自然断点法和智能化修正等方法，自下而上地开展国土空间生态修复分区，并提出相应的生态修复措施。研究结果表明：2010—2020年长江中游城市群耕地面积有所减少，建设用地扩张明显；生态系统健康状况较为稳定，但是存在明显的空间差异；生态系统活力和服务力提升明显，生态系统组织力和生态系统弹性呈下降趋势。根据分区结果，将研究区划分为生态系统保育区、生态系统提升区、生态系统缓冲圈、生态系统改良圈和生态系统重塑圈“两区三圈”的修复区域，并提出生态修复对策。

Research on land-space ecological restoration zoning based on ecosystem health: A case study of the urban agglomeration in the middle reaches along the Yangtze River

High-intensity social and economic activities have caused ecological problems such as shrinking rivers, lakes and wetlands, landscape fragmentation and biodiversity loss. Therefore, the implementation of territorial space ecological restoration has become an inevitable way to realizing eco-environmental governance. In this study, we have established grid-based "Vigor-Organization-Resilience-Service" (VORS) model to evaluate ecosystem health in the middle reaches along the Yangtze River in 2010 and 2020. Based on the natural breakpoint method and intelligent correction approach, the bottom-up territorial space ecological restoration zoning was carried out, and the corresponding ecological restoration measures were proposed. The results have shown that from 2010 to 2020, the cultivated land area in the urban agglomeration in the middle reaches along the Yangtze River decreased, whereas the built-up land expanded greatly. The ecosystem health status was relatively stable, but there was obvious spatial heterogeneity. The vigor and service values improved greatly, whereas the organization and resilience values showed a downward trend. Based on the assessment result, the study area was divided into "two areas and three circles", namely, the ecosystem conservation area, the ecosystem improvement area, the ecosystem buffer circle, the ecosystem improvement circle and ecosystem remolding circle. The ecological restoration countermeasures for each area and circle were proposed.