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<p>Examining the development of regional ecological sensitivity offers timely insights into ecological patterns and aids in formulating strategies for environmental conservation. However, there is a lack of a framework for analyzing the impact of major engineering projects on the ecological environment of the surrounding area. This has led to difficulties in determining the ecological status of the region. In this study, we established an ecological sensitivity index system, quantitatively analyzed the interrelationships of ecological factors, and used the CA–MC model, center of gravity migration, and kernel density to conduct the analysis, to explore the characteristics of the spatial and temporal evolution of the ecological sensitivity of the Sichuan–Tibet Railway along the route during the 12&#xa0;years. The results show that: (1) From 2015 to 2021, the LUCC and LI sensitivity of the Sichuan–Tibet Railway decreased in general, and the NDVI sensitivity increased in general. The ecological sensitivity of the areas along the line is characterized by the transformation from low grade to high grade. The insensitive and moderately sensitive areas decreased by 0.65% and 0.52% respectively; the extremely sensitive areas increased by 1.08%. (2) There were significant differences in the center of gravity shift and kernel density distribution of ecological sensitivity at all levels, with the insensitive area shifting to the east, the low sensitive, moderate sensitive, and extremely sensitive areas shifting to the northeast, and the extremely sensitive areas shifting to the southeast. (3) Through the CA–MC model, the overall sensitivity level of the Sichuan–Tibet Railway shows a slow fluctuating upward trend from 2015 to 2027. By exploring the regional ecological sensitivity along the Sichuan–Tibet Railway, the regional ecological evolution pattern is effectively revealed. It offers a foundation for the government to develop environmental protection policies and ecological restoration plans for major construction projects, thereby minimizing economic losses.</p>

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Characterization of spatial and temporal evolution of ecological sensitivity along major railroad projects

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Lingfan Ju,
  • Huan Yu,
  • LingQin Kong,
  • Yan Liu,
  • Shunduo Liu,
  • Qing Xiang,
  • Wenkai Hu,
  • Peng Yu

摘要

Examining the development of regional ecological sensitivity offers timely insights into ecological patterns and aids in formulating strategies for environmental conservation. However, there is a lack of a framework for analyzing the impact of major engineering projects on the ecological environment of the surrounding area. This has led to difficulties in determining the ecological status of the region. In this study, we established an ecological sensitivity index system, quantitatively analyzed the interrelationships of ecological factors, and used the CA–MC model, center of gravity migration, and kernel density to conduct the analysis, to explore the characteristics of the spatial and temporal evolution of the ecological sensitivity of the Sichuan–Tibet Railway along the route during the 12 years. The results show that: (1) From 2015 to 2021, the LUCC and LI sensitivity of the Sichuan–Tibet Railway decreased in general, and the NDVI sensitivity increased in general. The ecological sensitivity of the areas along the line is characterized by the transformation from low grade to high grade. The insensitive and moderately sensitive areas decreased by 0.65% and 0.52% respectively; the extremely sensitive areas increased by 1.08%. (2) There were significant differences in the center of gravity shift and kernel density distribution of ecological sensitivity at all levels, with the insensitive area shifting to the east, the low sensitive, moderate sensitive, and extremely sensitive areas shifting to the northeast, and the extremely sensitive areas shifting to the southeast. (3) Through the CA–MC model, the overall sensitivity level of the Sichuan–Tibet Railway shows a slow fluctuating upward trend from 2015 to 2027. By exploring the regional ecological sensitivity along the Sichuan–Tibet Railway, the regional ecological evolution pattern is effectively revealed. It offers a foundation for the government to develop environmental protection policies and ecological restoration plans for major construction projects, thereby minimizing economic losses.