Wu Qian-Lian, Li Fei-Xue, Zhang Qi-Shun, Li Man-Chun
School of Geography and Ocean Science, Nanjing University/Ministry of Natural Resources Key Laboratory of Land Satellite Remote Sensing Application/Jiangsu Key Laboratory of Geographic Information Science and Technology, Nanjing 210023, China.
Jiangsu Province Geographic Information Resources Development and Utilization Collaborative Innovation Center, Nanjing 210023, China.
Ying Yong Sheng Tai Xue Bao. 2022 Jul;33(7):1983-1992. doi: 10.13287/j.1001-9332.202207.023.
The rapid development of economy and society leads to the rapid expansion of cities, resulting in the atrophy of urban ecological space and the decline of ecological function, as well as a serious threat to urban ecological security. It is of great significance for the sustainable development of a city to systematically analyze the structure of urban ecological space and put forward targeted protection and optimization measures. Taking Changzhou City as the research area and considering the natural ecological function and social service function of urban ecological space, we constructed two ecological networks, the "source-corridor" ecological network based on natural ecology and the "supply-demand" ecological network based on human ecology. For the "source-corridor" ecological network, quantitative analysis was mainly carried out from the importance of nodes, network connectivity and stability. For the "supply-demand" ecological network, quantitative analysis was mainly carried out from the importance of nodes, supply-demand equilibrium and stability. The results showed that the levels of connectivity and stability of the "source-corridor" ecological network in the main urban area of Changzhou were not high, the stability level of the "supply-demand" ecological network was general, and there was spatial mismatch between service supply and demands. From the perspective of connectivity and stability improvement, an optimization scheme of "source-corridor" ecological network with 12 additional source nodes and 57 corridors was proposed. From the perspective of supply-demand balance and stability improvement, an optimization scheme of "supply-demand" ecological network with 22 new supply nodes was proposed. Compared with the original "source-corridor" ecological network, the connectivity level of the optimized network was improved by 10%, and the network stability was improved by 0.05. Compared with the initial "supply-demand" ecological network, the service level of the optimized network was improved by 4%, and the network stability was improved by 0.10. Finally, we integrated the two ecological networks, and formulated the implementation plan of protection and management for both the current protected patches and the new ecological nodes.
经济社会的快速发展导致城市迅速扩张，造成城市生态空间萎缩、生态功能衰退，对城市生态安全构成严重威胁。系统分析城市生态空间结构并提出针对性的保护与优化措施，对城市可持续发展具有重要意义。以常州市为研究区域，综合考虑城市生态空间的自然生态功能和社会服务功能，构建了基于自然生态的“源-廊道”生态网络和基于人类生态的“供需”生态网络。对于“源-廊道”生态网络，主要从节点重要性、网络连通性和稳定性方面进行定量分析。对于“供需”生态网络，主要从节点重要性、供需平衡和稳定性方面进行定量分析。结果表明，常州市主城区“源-廊道”生态网络的连通性和稳定性水平不高，“供需”生态网络稳定性一般，服务供需存在空间错配。从提升连通性和稳定性角度，提出了增加12个源节点和57条廊道的“源-廊道”生态网络优化方案。从提升供需平衡和稳定性角度，提出了增加22个新供应节点的“供需”生态网络优化方案。优化后的“源-廊道”生态网络连通性水平比原网络提高了10%，网络稳定性提高了0.05。优化后的“供需”生态网络服务水平比初始网络提高了4%，网络稳定性提高了0.10。最后，对两个生态网络进行整合，制定了针对现有保护斑块和新增生态节点的保护管理实施方案。
