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<p>The Chengdu–Chongqing urban agglomeration, a major economic hub in western China, is experiencing increasing pressure on land resources and ecological systems under rapid urbanization. Land use conflicts have become increasingly prominent, necessitating a systematic analysis of their spatiotemporal patterns and associated ecological risks to support coordinated regional planning and ecological security. This study develops an integrated ecological security–based framework by combining ecosystem service supply–demand ratio analysis, the InVEST (Integrated Valuation of Ecosystem Services and Tradeoffs) model, and the Minimum Cumulative Resistance (MCR) model. The framework is applied to identify ecological sources, construct ecological security patterns, and assess land use conflict dynamics from 2000 to 2020. By linking ecosystem service supply–demand relationships with ecological network construction, this approach enables a comprehensive evaluation of land use conflicts and their spatiotemporal heterogeneity. The results indicate a significant improvement in regional ecological security, with high-security areas increasing from 11.11% to 14.53%, while low-security areas decreased from 37.25% to 31.61%. Spatially, a clear “core–periphery–source” gradient is observed, where high-security zones are concentrated in mountainous and protected areas, and urban fringes exhibit transitional characteristics. Land use conflicts between cultivated land and construction land have intensified with urban expansion, with intense and severe conflict zones now exceeding 48% of the study area. However, the overall intensity of cultivated land conflicts has declined due to ecological management and land use optimization. Notably, high-security areas often overlap with severe conflict zones—particularly in the Chengdu Plain, central Chongqing, and the intercity economic corridor—revealing a pronounced “high-value–high-risk” spatial tension.</p>

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An ecological security framework for land use conflict assessment and spatiotemporal dynamics: a case study of the Chengdu-Chongqing Urban Agglomeration

  • 期刊论文

  • 发表日期：

    2026年7月14日

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  • Lei Zhu,
  • Yi He,
  • Dejing Chen,
  • Yanhong Tang,
  • Rui Yan

摘要

The Chengdu–Chongqing urban agglomeration, a major economic hub in western China, is experiencing increasing pressure on land resources and ecological systems under rapid urbanization. Land use conflicts have become increasingly prominent, necessitating a systematic analysis of their spatiotemporal patterns and associated ecological risks to support coordinated regional planning and ecological security. This study develops an integrated ecological security–based framework by combining ecosystem service supply–demand ratio analysis, the InVEST (Integrated Valuation of Ecosystem Services and Tradeoffs) model, and the Minimum Cumulative Resistance (MCR) model. The framework is applied to identify ecological sources, construct ecological security patterns, and assess land use conflict dynamics from 2000 to 2020. By linking ecosystem service supply–demand relationships with ecological network construction, this approach enables a comprehensive evaluation of land use conflicts and their spatiotemporal heterogeneity. The results indicate a significant improvement in regional ecological security, with high-security areas increasing from 11.11% to 14.53%, while low-security areas decreased from 37.25% to 31.61%. Spatially, a clear “core–periphery–source” gradient is observed, where high-security zones are concentrated in mountainous and protected areas, and urban fringes exhibit transitional characteristics. Land use conflicts between cultivated land and construction land have intensified with urban expansion, with intense and severe conflict zones now exceeding 48% of the study area. However, the overall intensity of cultivated land conflicts has declined due to ecological management and land use optimization. Notably, high-security areas often overlap with severe conflict zones—particularly in the Chengdu Plain, central Chongqing, and the intercity economic corridor—revealing a pronounced “high-value–high-risk” spatial tension.