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Spatial Gradient Effects of Landscape Pattern on Ecological Quality Along the Grand Canal

Author

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  • Yonggeng Xiong

    (College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China)

  • Aibo Jin

    (School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China)

Abstract

The Grand Canal serves as a vital water transportation route, a UNESCO World Cultural Heritage site, and an ecological corridor. It is currently undergoing coordinated transformation through infrastructure development, heritage preservation, and ecological restoration. However, existing research has primarily focused on either cultural heritage conservation or localized ecological issues, with limited attention to the spatial relationship between landscape patterns and ecological quality along the entire corridor. To address this gap, this study examines eight sections of the Grand Canal and develops a gradient analysis framework based on equidistant buffer zones. The framework integrates the Remote Sensing Ecological Index (RSEI) with landscape pattern indices to assess ecological responses across spatial gradients. A Multi-scale Geographically Weighted Regression (MGWR) model is applied to reveal the spatially heterogeneous effects of landscape patterns on ecological quality. From 2013 to 2023, landscape patterns showed a trend toward increasing agglomeration and regularity. This is indicated by a rise in the Aggregation Index (AI) from 91.24 to 91.38 and declines in both patch density (PD) from 8.45 to 8.20 and Landscape Shape Index (LSI) from 199.74 to 196.72. During the same period, ecological quality slightly declined, with RSEI decreasing from 0.66 to 0.57. The effects of PD and Shannon’s Diversity Index (SHDI) on ecological quality varied across canal sections. In highly urbanized areas such as the Tonghui River, these indices were positively correlated with ecological quality, whereas in less urbanized areas like the Huitong River, negative correlations were observed. Overall, the strength of these correlations tended to weaken with increasing buffer distance. This study provides a scientific foundation for the integrated development of ecological protection and spatial planning along the Grand Canal and offers theoretical insights for the refined management of other major inland waterways.

Suggested Citation

  • Yonggeng Xiong & Aibo Jin, 2025. "Spatial Gradient Effects of Landscape Pattern on Ecological Quality Along the Grand Canal," Land, MDPI, vol. 14(6), pages 1-23, June.
    • Handle: RePEc:gam:jlands:v:14:y:2025:i:6:p:1310-:d:1682902
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    References listed on IDEAS

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