城市群生态安全格局构建:概念辨析与理论思考

城市群是城市发展到一定阶段通过城市间物流、人流和能流高度融合而形成的区域性复合生态系统,如何保障城市群生态安全与健康发展成为当前关注的热点问题。本研究系统分析了生态安全、城市生态安全与城市群生态安全的内涵。认为狭义上城市群生态安全侧重于城市群内部生态空间优化和生态系统服务功能提升,重点关注城市群地区生态用地空间优化与"三生空间"（生态、生活及生产空间）的合理布局。广义上的城市群生态安全不仅需要考虑城市群内部生态系统结构和功能协调及其生态系统服务的供需平衡,也需要从区域尺度考虑城市群与其他区域之间的协调关系。城市群生态安全格局构建的目的则是保障城市群内部区域一体化协调发展,满足人们日常生活的基本需求,实现城市群与区域之间物流、能流和人流的有序流通。在城市群生态安全格局构建时,除了遵循生态安全一般性原则外,还需要遵循以下原则：①生态系统服务供需平衡尺度效应;②生态安全保障的阈值效应;③生态安全格局的空间联动效应。最后文章提出了城市群生态安全格局构建的基本思路和技术路径。

Eco-security pattern building in urban agglomeration: conceptual and theoretical thinking

Urban agglomeration is a regional complex ecosystem developed by the integration of substance, energy and labor flow between cities after urban development to a high level. How to ensure the ecological security and sustainable development of urban agglomeration has become a hot topic. Through literature review, this paper analyzes the characteristics of ecological security, urban ecological security and urban agglomeration ecological security. In a broad sense, the ecological security of urban agglomeration needs to consider not only the optimization of ecosystem pattern and function as well as the balance of supply and demand of ecosystem service, but also the tele-coupling relationship between urban agglomeration and the other regions. The goal of building eco-security pattern in urban agglomeration is to ensure the coordinated development of regional integration within the urban agglomeration, to meet the basic needs of human daily life, and to realize the regular circulation of substance flow, energy flow and labor flow between urban agglomeration and the other regions. When an eco-security pattern of urban agglomeration is to be established, the following principles have to be followed: (1) the difference of supply and human demand on ecosystem services in different levels; (2) the threshold effect of eco-security for different cities; (3) the spatial synergistic linkage of eco-security pattern. Finally, the basic idea and technical roadmap to build eco-security pattern in urban agglomeration was proposed.