Rapid urbanization and drastic land-use change have led to landscape fragmentation and ecological environment deterioration in the regions along the Grand Canal. Building an ecological network is an important means to improve the connectivity of habitat patches and carry out ecological protection and restoration of territorial space, which is of great significance to ensure regional biodiversity and ecological security. In this article, we took the Huaiyang Section of the Grand Canal (Huaiyang Canal) as the study area, used the ecosystem service assessment model, morphological spatial pattern analysis (MSPA), and the landscape connectivity evaluation method to identify ecological sources, then used the minimum cumulative resistance (MCR) model and the gravity model to extract and grade ecological corridors. Based on these, the ecological network was constructed by combining the identification method of ecological nodes and ecological breakpoints. The aim of this was to provide a reference for the ecological space optimization of Huaiyang Canal and even the entire Grand Canal, the formulation of an ecological protection plan, and the implementation of territorial space ecological restoration. The results showed that the spatial distribution of the water conservation service, soil conservation service, carbon sequestration service, and biodiversity conservation service were significantly different, and the level of ecosystem services showed a trend of continuous degradation from 1990 to 2018. There were 12 ecological source patches comprehensively identified by multiple methods, with a total area of 2007.06 km². In terms of spatial distribution, large ecological source patches were mainly distributed in the central and western areas adjacent to the Grand Canal, while small ecological source patches were scattered in the eastern and southern border regions of the study area. The total length of ecological corridors was 373.84 km, of which the number of the primary ecological corridor, secondary ecological corridor, and tertiary ecological corridor were 9, 7, and 7, respectively, and the suitable width of the ecological corridor was 200–400 m. After optimization, the proposed ecological network was composed of 3 key ecological source patches, 9 important ecological source patches, 23 terrestrial corridors, 10 aquatic corridors, and 18 ecological nodes. Twenty-nine ecological breakpoints were key areas requiring ecological restoration. The overlap rate of the integrated ecosystem service change area and land-use change area was 99%, indicating that land-use change has a significant impact on regional ecosystem services. This study is of great significance for carrying out the ecological protection and restoration of the Huaiyang Canal and adjusting local land-use policies. It also provides a typical case demonstration for identifying an ecological network and formulating ecological restoration planning for other sections of the Grand Canal and cities along the canal.

中文翻译：

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联动生态服务与MSPA构建大运河淮阳段景观生态网络

快速的城市化进程和急剧的土地利用变化导致大运河沿线地区的景观破碎化和生态环境恶化。构建生态网络是提高生境斑块连通性、开展国土空间生态保护和修复的重要手段，对保障区域生物多样性和生态安全具有重要意义。本文以大运河淮阳段（淮阳运河）为研究区，采用生态系统服务评价模型、形态空间格局分析（MSPA）和景观连通性评价方法识别生态源，采用最小累积阻力（MCR）模型和重力模型来提取和分级生态廊道。基于这些，结合生态节点和生态断点的识别方法构建生态网络。旨在为淮阳运河乃至整个大运河的生态空间优化、生态保护规划的制定、国土空间生态修复的实施提供参考。结果表明，1990—2018年间，水源保持服务、水土保持服务、碳汇服务、生物多样性保持服务的空间分布存在显着差异，生态系统服务水平呈现持续退化的趋势。12多种方法综合识别的源斑块，总面积2007.06平方公里 旨在为淮阳运河乃至整个大运河的生态空间优化、生态保护规划的制定、国土空间生态修复的实施提供参考。结果表明，1990—2018年间，水源保持服务、水土保持服务、碳汇服务、生物多样性保持服务的空间分布存在显着差异，生态系统服务水平呈现持续退化的趋势。12多种方法综合识别的源斑块，总面积2007.06平方公里 旨在为淮阳运河乃至整个大运河的生态空间优化、生态保护规划的制定、国土空间生态修复的实施提供参考。结果表明，1990—2018年间，水源保持服务、水土保持服务、碳汇服务、生物多样性保持服务的空间分布存在显着差异，生态系统服务水平呈现持续退化的趋势。12多种方法综合识别的源斑块，总面积2007.06平方公里 实施国土空间生态修复。结果表明，1990—2018年间，水源保持服务、水土保持服务、碳汇服务、生物多样性保持服务的空间分布存在显着差异，生态系统服务水平呈现持续退化的趋势。12多种方法综合识别的源斑块，总面积2007.06平方公里 实施国土空间生态修复。结果表明，1990—2018年间，水源保持服务、水土保持服务、碳汇服务、生物多样性保持服务的空间分布存在显着差异，生态系统服务水平呈现持续退化的趋势。12多种方法综合识别的源斑块，总面积2007.06平方公里². 从空间分布上看，大生态源斑块主要分布在毗邻大运河的中西部地区，而小生态源斑块则分散在研究区的东部和南部边境地区。生态廊道总长373.84公里，其中一级生态廊道、二级生态廊道、三级生态廊道数分别为9、7、7条，生态廊道适宜宽度为200～400米。优化后的生态网络由3个重点生态源斑块、9个重要生态源斑块、23条陆地廊道、10条水道廊道、18个生态节点组成。29个生态断点是需要生态修复的重点区域。综合生态系统服务变化区与土地利用变化区重叠率为99%，表明土地利用变化对区域生态系统服务有显着影响。本研究对开展淮阳运河生态保护与修复工作，调整当地土地利用政策具有重要意义。它还为大运河其他段和运河沿线城市识别生态网络和制定生态恢复规划提供了典型案例。本研究对开展淮阳运河生态保护与修复工作，调整当地土地利用政策具有重要意义。它还为大运河其他段和运河沿线城市识别生态网络和制定生态恢复规划提供了典型案例。本研究对开展淮阳运河生态保护与修复工作，调整当地土地利用政策具有重要意义。它还为大运河其他段和运河沿线城市识别生态网络和制定生态恢复规划提供了典型案例。