Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river delta
The Yangtze River Delta (YRD), China's most rapidly urbanizing region, faces escalating ecological challenges including urban heat island effects and fragmentation of ecological networks. Existing studies often address ecological connectivity or thermal mitigation in isolation, lacking a compre...
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| Format: | Article |
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Elsevier
2025-09-01
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| Series: | Environmental and Sustainability Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2665972725002508 |
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| author | Jianshen Qu Hao Wang ZiWei Zhang Zhili Xu Yuexia Han Bin Dong |
| author_facet | Jianshen Qu Hao Wang ZiWei Zhang Zhili Xu Yuexia Han Bin Dong |
| author_sort | Jianshen Qu |
| collection | DOAJ |
| description | The Yangtze River Delta (YRD), China's most rapidly urbanizing region, faces escalating ecological challenges including urban heat island effects and fragmentation of ecological networks. Existing studies often address ecological connectivity or thermal mitigation in isolation, lacking a comprehensive framework integrating ecological, thermal, and economic functions. This study integrates the gradient source model and circuit theory to optimize a multi-functional composite network linking ecological services, thermal environment diffusion, and economic interactions in the YRD. The result shows: (1)The total lengths of optimized corridors are 3161.98 km (ecological), 3364.83 km (thermal), and 2205.02 km (economic). Ecological corridors show strong continuity, supporting biodiversity and habitat connectivity; thermal corridors aid in urban heat dispersion; and economic corridors emphasize regional accessibility. (2)A multi-level corridor hierarchy reveals that ecological services dominate at the primary level, while thermal and economic functions are more dispersed in secondary and tertiary levels. (3)Under five attack scenarios, network simulations show that random attacks have limited impact, whereas attacks based on betweenness centrality (BC) significantly reduce network efficiency, connectivity, and robustness, fragmenting the largest subgraph. Attacks based on degree centrality (DC) and straight-line closeness (SCL) cause moderate disruption, slightly exceeding that of K-shell-based attacks. (4)Key protected zones totaling 12,662 km2 in northwestern Jiangsu and northeastern Zhejiang are identified as crucial nodes for maintaining functional integration. These findings offer strategic insights into sustainable spatial planning and ecological protection in the region. |
| format | Article |
| id | doaj-art-5234464edcb140fdbf2f392f0e1c9e4d |
| institution | Kabale University |
| issn | 2665-9727 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environmental and Sustainability Indicators |
| spelling | doaj-art-5234464edcb140fdbf2f392f0e1c9e4d2025-08-20T04:01:00ZengElsevierEnvironmental and Sustainability Indicators2665-97272025-09-012710082910.1016/j.indic.2025.100829Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river deltaJianshen Qu0Hao Wang1ZiWei Zhang2Zhili Xu3Yuexia Han4Bin Dong5.School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui 230036, China; .School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei, Anhui 230036, China.School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui 230036, China; .School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei, Anhui 230036, China.School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui 230036, China.School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui 230036, China.School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui 230036, China; .School of Economics and Management, Anhui Agricultural University, Hefei, Anhui 230036, China.School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui 230036, China; Corresponding author.The Yangtze River Delta (YRD), China's most rapidly urbanizing region, faces escalating ecological challenges including urban heat island effects and fragmentation of ecological networks. Existing studies often address ecological connectivity or thermal mitigation in isolation, lacking a comprehensive framework integrating ecological, thermal, and economic functions. This study integrates the gradient source model and circuit theory to optimize a multi-functional composite network linking ecological services, thermal environment diffusion, and economic interactions in the YRD. The result shows: (1)The total lengths of optimized corridors are 3161.98 km (ecological), 3364.83 km (thermal), and 2205.02 km (economic). Ecological corridors show strong continuity, supporting biodiversity and habitat connectivity; thermal corridors aid in urban heat dispersion; and economic corridors emphasize regional accessibility. (2)A multi-level corridor hierarchy reveals that ecological services dominate at the primary level, while thermal and economic functions are more dispersed in secondary and tertiary levels. (3)Under five attack scenarios, network simulations show that random attacks have limited impact, whereas attacks based on betweenness centrality (BC) significantly reduce network efficiency, connectivity, and robustness, fragmenting the largest subgraph. Attacks based on degree centrality (DC) and straight-line closeness (SCL) cause moderate disruption, slightly exceeding that of K-shell-based attacks. (4)Key protected zones totaling 12,662 km2 in northwestern Jiangsu and northeastern Zhejiang are identified as crucial nodes for maintaining functional integration. These findings offer strategic insights into sustainable spatial planning and ecological protection in the region.http://www.sciencedirect.com/science/article/pii/S2665972725002508Circuit theoryGradient source-sink modelComplex network theoryNetwork resilienceYangtze river Delta region |
| spellingShingle | Jianshen Qu Hao Wang ZiWei Zhang Zhili Xu Yuexia Han Bin Dong Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river delta Environmental and Sustainability Indicators Circuit theory Gradient source-sink model Complex network theory Network resilience Yangtze river Delta region |
| title | Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river delta |
| title_full | Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river delta |
| title_fullStr | Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river delta |
| title_full_unstemmed | Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river delta |
| title_short | Construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios: A case study of the Yangtze river delta |
| title_sort | construction of multifunctional composite networks and resilience evaluation under multiple attack scenarios a case study of the yangtze river delta |
| topic | Circuit theory Gradient source-sink model Complex network theory Network resilience Yangtze river Delta region |
| url | http://www.sciencedirect.com/science/article/pii/S2665972725002508 |
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