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<p>Ecological corridors (ECs) are essential for maintaining ecological security in urbanizing watersheds. However, their spatial evolution under complex human disturbances and the associated effects on ecological environment quality (EEQ) remain insufficiently understood at the scale of small urban watersheds. This study focuses on the Jiyu River Watershed in Hefei City and integrates high-resolution remote sensing and GIS to evaluate EEQ using a multi-factor model incorporating vegetation, topography, hydrology, and climate. Ecological sources were identified using morphological spatial pattern analysis (MSPA) and landscape connectivity, and ECs were extracted based on the minimum cumulative resistance (MCR) model. The spatial variation of EEQ across corridor buffer zones was further analyzed. A two-period (2019–2024) comparison reveals that the total length of ECs decreased from 66.14&#xa0;km (20 corridors) to 53.45&#xa0;km (17 corridors), with a shift from a "northern network–southern ring" to a more integrated "northern ring–southern network" pattern. Human activities exert dual effects: ecological restoration enhances connectivity, whereas mining increases local resistance. EEQ remains at relatively high levels and improves in 2024, driven by wetland construction. Buffer zone analysis identifies a hierarchical structure that supports corridor-based zoned management for coordinated improvements in connectivity and EEQ.</p>

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Comparative analysis of ecological corridor evolution and environmental quality in an urban small watershed: A case study of the Jiyu River, Hefei (2019–2024)

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Guoxu Chen,
  • Kaidi Yang,
  • Ruirui Li,
  • Li Cao,
  • Xincheng Gao,
  • Yongqi Fan,
  • Kesheng Zuo,
  • Li’ao Quan

摘要

Ecological corridors (ECs) are essential for maintaining ecological security in urbanizing watersheds. However, their spatial evolution under complex human disturbances and the associated effects on ecological environment quality (EEQ) remain insufficiently understood at the scale of small urban watersheds. This study focuses on the Jiyu River Watershed in Hefei City and integrates high-resolution remote sensing and GIS to evaluate EEQ using a multi-factor model incorporating vegetation, topography, hydrology, and climate. Ecological sources were identified using morphological spatial pattern analysis (MSPA) and landscape connectivity, and ECs were extracted based on the minimum cumulative resistance (MCR) model. The spatial variation of EEQ across corridor buffer zones was further analyzed. A two-period (2019–2024) comparison reveals that the total length of ECs decreased from 66.14 km (20 corridors) to 53.45 km (17 corridors), with a shift from a "northern network–southern ring" to a more integrated "northern ring–southern network" pattern. Human activities exert dual effects: ecological restoration enhances connectivity, whereas mining increases local resistance. EEQ remains at relatively high levels and improves in 2024, driven by wetland construction. Buffer zone analysis identifies a hierarchical structure that supports corridor-based zoned management for coordinated improvements in connectivity and EEQ.