基于生态安全格局的苏锡常都市圈绿化系统空间布局研究

Study on Spatial Layout of Greening System in Suzhou-Wuxi-Changzhou Metropolitan Area Based on Ecological Security Pattem

从维持区域生态过程的完整性、预防生态系统退化带来的生态环境问题和保障区域重要生态服务功能的可持续性出发,以社会经济发展水平较高的苏锡常都市圈为研究对象。以生态系统服务效益较大的林地和水域为生态绿化用地的扩张"源",采用最小累积阻力模型(MCR)构建了苏锡常都市圈生态绿化用地的安全格局,以阻力因子的阻力值发生明显突变的点作为不同生态安全水平生态绿化用地的划分依据,最终获得高、中、低3种水平绿化用地的综合生态安全格局。在此基础上提出了"一核、一带、五脉、十廊、多斑块"的多层次、多功能、网络化的苏锡常都市圈绿化系统布局结构。该研究为大尺度区域的绿化系统空间布局提供了科学依据,有助于整体解决跨多个行政区绿化系统规划的问题。

Starting from maintaining the integrity of regional ecological processes, preventing ecological and environmental problems caused by ecosystem degradation, and ensuring the sustainability of important ecological service functions in the region, Suzhou-Wuxi-Cbangzhou metropolitan area with high level of social and economic development is the research object. The forest land and waters with greater ecosystem service benefits are the ＂sources＂ for the expansion of ecological greening land. The minimum cumulative resistance model （MCR） is used to construct the safety pattern of the ecological greening land in Suzhou- Wuxi-Changzhou metropolitan area, and the resistance value of the resistance factor is obviously changed. As the basis for the division of ecological greening land with different ecological safety levels, the point will eventually obtain the comprehensive ecological security pattern of high, medium and low levels of greening land. On this basis, the layout structure of the multi-level, multi-functional, networked Suzhou- Wuxi-Changzhou metropolitan greening system of＂one core, one belt, five veins, ten corridors and multiple patches＂ was proposed. The study provides a scientific basis for the spatial layout of greening systems in large-scale areas, and contributes to the overall solution to the problem of planning greening systems across multiple administrative regions.