Department of Landscape Architecture, Faculty of Architecture, South China University of Technology, Guangzhou, 510640, China.
The State Key Laboratory of Subtropical Building Science, Guangzhou, 510640, China.
Environ Sci Pollut Res Int. 2023 Jul;30(31):76891-76910. doi: 10.1007/s11356-023-27495-z. Epub 2023 May 29.
The urban agglomerations' rapid expansion and population growth have led to the fragmentation of landscape patterns and the degradation of ecosystems, seriously threatening regional ecological security. Ecological security pattern (ESP) is a spatial planning approach to effectively balance the development of urbanization and ecological protection. However, previous studies have ignored the difference in the importance of ecosystem services and the spatial compactness of ecological sources. The quantitative management objectives for maintaining the resilience of ESP are also rarely discussed. In this study, taking the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) as an example, ecological sources were identified by simulating multiple ES weight assignment scenarios through GeoSOS area optimization. Ecological corridors and strategic points were extracted by Linkage Mapper. The robustness analysis based on complex network theory was performed to quantify the management objectives of ESPs. The results showed that ESPs include 26,130.61 km ecological sources (accounting for 46.6% of the area of GBA), 557 ecological corridors, and 112 ecological strategic points. In more detail, ecological sources are mainly distributed in the western and eastern mountainous areas, and ecological corridors primarily link peripheral edge areas of GBA in a circular radial shape. Compared with the current nature reserves, the identified ecological sources are more compact in landscape pattern. According to the robustness analysis, at least 23% of the important ecological sources should be strictly restricted from development activities to maintain the ESP's ability to resist ecological risks. This study also proposed corresponding differentiated ESPs management strategies. By optimizing the existing ESPs construction method and clarifying the ESPs management strategies, this study provides a completely scientific framework for the construction and management of ESPs in urban agglomerations.
城市群的快速扩张和人口增长导致景观格局破碎化和生态系统退化，严重威胁区域生态安全。生态安全格局（ESP）是一种空间规划方法，可有效平衡城市化发展与生态保护之间的关系。然而，以往的研究忽略了生态系统服务的重要性和生态源空间紧凑性的差异，也很少讨论维持 ESP 弹性的定量管理目标。本研究以粤港澳大湾区（GBA）为例，通过 GeoSOS 区域优化模拟多种 ES 权重分配情景来识别生态源，通过 Linkage Mapper 提取生态廊道和战略点。基于复杂网络理论的稳健性分析用于量化 ESP 的管理目标。结果表明，ESP 包括 26,130.61km 的生态源（占 GBA 面积的 46.6%）、557 条生态廊道和 112 个生态战略点。更详细地说，生态源主要分布在西部和东部山区，生态廊道主要以环形辐射状连接 GBA 的外围边缘地区。与现有的自然保护区相比，所识别的生态源在景观格局上更加紧凑。根据稳健性分析，至少 23%的重要生态源应严格限制开发活动，以维持 ESP 抵御生态风险的能力。本研究还提出了相应的差异化 ESP 管理策略。通过优化现有的 ESP 建设方法和明确 ESP 管理策略，本研究为城市群的 ESP 建设和管理提供了一个完全科学的框架。
