Study on the spatial and temporal evolution characteristics and optimization path of cross-regional ecological security pattern—taking Nanjing-Hefei metropolitan area as an example

YU Rui, ZHENG Zhiyuan, ZHENG Jie, LU Shan

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2025, Vol. 49 ›› Issue (4) : 241-252.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2025, Vol. 49 ›› Issue (4) : 241-252. DOI: 10.12302/j.issn.1000-2006.202311023

Study on the spatial and temporal evolution characteristics and optimization path of cross-regional ecological security pattern—taking Nanjing-Hefei metropolitan area as an example

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Abstract

【Objective】The construction of an ecological security pattern in cross-border areas is the key to ensuring regional ecological security and high-quality development. By building an ecological network across regions, this study reveals the degradation and spatial heterogeneity characteristics of ecological barriers in the process of rapid urbanization, promotes the integrity, connectivity and stability among ecological sources, and provides a scientific basis for the protection and optimization of the ecological security pattern of cross-provincial urban agglomerations.【Method】Taking the Nanjing-Hefei metropolitan area as the research area, the spatio-temporal pattern changes of the ecological security pattern in 2000, 2010 and 2020 were compared and analyzed. Based on the reversible nature of ecological sources, the restored and newly added ecological sources were selected to optimize the regional ecological security pattern. Combined with the regional ecological background, the protection and restoration pattern of territorial space was proposed, and the collaborative governance path of the ecological network in the cross-border area was explored.【Result】(1)The number of ecological sources in the study area decreased year by year from 2000 to 2020, while the total area remained stable and increased. (2)The overall habitat quality in the study area was at a medium level from 2000 to 2020 and showed a declining trend, while the ecological resistance gradually increased.(3)The number of ecological corridors increased first and then decreased in the three periods, and the number of ecological nodes increased year by year. The eastern part of the study area was lacking in ecological corridors.(4)The number of high-priority ecological corridors in the study area increased first and then decreased from 2000 to 2020, and the overall spatial distribution pattern was an inverted “T” shape. The ecological network structure became increasingly fragile.(5)Combining the spatial distribution of the natural ecological background of the study area and the optimized ecological security pattern, the protection and restoration pattern of territorial space was proposed as “multiple cores, four corridors, three screens, two belts and one center”, and the construction path of collaborative governance of the ecological environment in the cross-border area was explored.【Conclusion】This study considers the integrity of the ecological network of the Nanjing-Hefei metropolitan area from the perspective of spatiotemporal changes, and optimizes the ecological security pattern based on the actual situation of the regional ecological background. It also proposes measures for the protection and restoration of national land space, which can provide theoretical basis and technical reference for the ecological security and cross regional protection and restoration of national land space in the Nanjing-Hefei metropolitan area.

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ecological security pattern / spatial and temporal evolution / layout optimization / Nanjing-Hefei metropolitan area

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YU Rui , ZHENG Zhiyuan , ZHENG Jie , et al. Study on the spatial and temporal evolution characteristics and optimization path of cross-regional ecological security pattern—taking Nanjing-Hefei metropolitan area as an example[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2025, 49(4): 241-252 https://doi.org/10.12302/j.issn.1000-2006.202311023

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