长江流域资源与环境 >> 2025, Vol. 34 >> Issue (6): 1251-.doi: 10.11870/cjlyzyyhj202506008

•　自然资源　• 上一篇    下一篇

长江流域生态系统健康时空变化及驱动因素分析

王锐婕1，王伦澈1,2*，曹茜1,2，牛自耕1,2   

  1. 长江流域是我国重要的生态屏障，近几十年来，剧烈的气候变化和人类活动改变了长江流域的自然景观，并使其生态系统结构发生改变，生态系统功能退化。采用活力-组织-弹性-生态系统服务功能评价框架，在县域尺度上计算了2000~2020年长江流域生态系统健康指数（Ecosystem Health Index, EHI），利用空间自相关方法分析了生态系统健康的空间聚集效应，并基于最优参数地理探测器模型和地理加权回归模型揭示了驱动因素的独立效应和联合效应及驱动因素的空间变化特征。结果表明：（1）长江流域生态系统健康水平整体较好，EHI均值为0545，中下游高于上游，南部高于北部，生态系统水平较高的地区主要分布在林地及其周围，20年间，长江流域的生态系统健康水平呈现改善趋势；（2）研究期内，长江流域生态系统健康水平呈现显著的空间集聚效应，且空间集聚程度呈现减弱趋势；（3）在驱动因子方面，影响长江流域生态系统健康的主导因素是土地利用强度和林地占比，自然因素对流域大部分区域有正向影响，社会经济因素对流域大部分地区有负向影响，且社会经济因素对长江流域生态系统健康的影响力度要大于自然因素。该研究可为长江流域生态系统的保护和管理，促进长江流域可持续协调发展提供理论参考。
  • 出版日期:2025-06-20 发布日期:2025-06-27

Spatio-temporal Variation of Ecosystem Health and Driving Factors in Yangtze River Basin

WANG Rui-jie1, WANG Lun-che1, CAO Qian1, NIU Zi-geng1,2   

  1. The Yangtze River basin is a crucial ecological barrier in China.Over the past few decades, intense climate changes and human activities have altered the natural landscape of the Yangtze River basin, leading to changes in its ecosystem structure and degradation of ecosystem functions.This study utilized the vigor-organization-resilience-ecosystem service function evaluation framework to assess the ecosystem health level in the Yangtze River basin from 2000 to 2020 at the county scale.Spatial autocorrelation methods were utilized to analyze the spatial aggregation of ecosystem health, and the independent and joint effects of drivers and the spatial variation of drivers were explored using the optimal parametric geographical detector model and geographically weighted regression model.The results indicated that (1) the ecosystem health level of the Yangtze River Basin was better overall, with an average EHI of 0545.This value was higher in the middle and lower reaches than in the upper reaches, and higher in the south than in the north.The areas with higher ecosystem levels were mainly distributed in and around forest land, and the overall ecosystem health level in the Yangtze River basin showed an improving trend over the last two decades; (2) There was a significant spatial clustering effect in the ecosystem health levels of the Yangtze River basin, and the degree of spatial clustering showed a decreasing trend; (3) Regarding driving factors, the dominant factors were land use intensity and the proportion of forest land.Natural factors exerted a positive influence on most areas of the basin, while socio-economic factors had a negative influence, with their impact on the ecosystem health of the Yangtze River basin surpassing that of natural factors.This study provided theoretical references for the protection and management of the Yangtze River basin ecosystem, promoting its sustainable and coordinated development
  • Online:2025-06-20 Published:2025-06-27

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CN 42-1320/X
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