社会—生态系统适应性治理视角下绿地空间恢复力的演化——广州旧城区更新案例

旧城区绿地作为关键的社会—生态系统载体,是城市高质量发展与转型治理亟需关注的问题。构建广州旧城区绿地服务基本单元,引入适应性循环理论的潜力—连通度—恢复力三维框架,构建表征生态、社会与经济服务的绿地景观指标体系,综合评估2000—2018年广州旧城区绿地的空间恢复力水平及适应性转化特征。研究结果显示：旧城区绿地的恢复力演化具有明显的核心区与外围区的时空分异,在拆除重建阶段呈现快速开发—快速释放—重组的转化,在微更新阶段主要呈现开发—保护的提升,并具有提升型、稳定型和更替型的社会—生态系统服务适应性。由此说明,城市更新具有调节社会—生态系统服务治理的效果。其中,绿地形状指数、5 min可达绿地率以及土地利用混合度对核心区绿地恢复力具有显著的促进作用,为外围区治理提供参考。同时,进一步探讨了更新政策与城市绿地空间恢复力演化的关系,为促进旧城区绿地空间更新治理提供社会—生态系统适应性的理论与实证案例研究。

Spatial resilience evolution of green space from the perspective of social-ecological system adaptive governance: A case study for urban renewal in Guangzhou,China

As a key carrier of social-ecological systems, the green space in the old urban communities is a critical issue for urban high-quality development and transformation governance demands. This study constructs the basic units of green space service in old urban areas of Guangzhou. We introduce the three-dimensional framework of potential-connectedness-resilience of adaptive cycle theory to construct a green space landscape index system representing ecological, social, and economic services. This index system evaluates the spatial resilience level and adaptability transformation characteristics of green space in old urban areas of Guangzhou from 2000 to 2018. Results show that the spatial resilience evolution of the old urban green space has apparent spatiotemporal differentiation in the core and peripheral areas. In demolition reconstruction phase we witness the fast development-quick release-restructuring; in micro renewal stage mainly emerges the development-protection, which consists of three types of improvement, stability, and alternation in social-ecological system services adaptability. The results indicate that urban renewal can regulate the governance of social-ecological services. Among them, green space shape index, green space rate within a 5-minute range, and land use mix degree have significantly promote the resilience of core green space, which provides successful examples for the governance in the peripheral areas. Meanwhile, this paper discusses the relationship between renewal policy and the spatial resilience evolution of green space, which provides a theoretical and empirical study of social-ecological system adaptability for promoting green space renewal governance in old urban areas.