干旱区研究

Arid Zone Research >

2024 , Vol. 41 >Issue 11: 1908 - 1920

DOI: https://doi.org/10.13866/j.azr.2024.11.11

Ecology and Environment

Landscape ecological risk assessment and driving factors analysis in the Three River Source Region from 2000 to 2020

  • WANG Chengwu ,
  • YAO Liangjie ,
  • WANG Zhoufeng ,
  • ZHANG Qiao ,
  • XIE Liang
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  • School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China

Received date: 2024-06-13

  Revised date: 2024-09-19

  Online published: 2024-11-29

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Abstract

The Three River Source Region is a crucial source and catchment area, and its ecological security is vital. Investigating the spatial and temporal variations of landscape ecological risks and their drivers in this region is essential for promoting ecological security and the sustainable development of water resources in Southeast Asia. In this study, we focused on the Three River Source Region and constructed an evaluation model using land use data from the fifth phase to analyze the spatial and temporal characteristics and trends of landscape ecological risk. We employed a parametric optimal geodetector to compare and analyze the driving factors behind the spatial variation of landscape ecological risk at both global and local scales. The results revealed the following: (1) From 2000 to 2020, the study area exhibited a significant positive correlation with landscape ecological risk, particularly within the medium-and medium-low-risk areas, with areas classified as high-risk. (2) From 2000 to 2020, the landscape ecological risk in the study area improved, with high-and low-risk areas transitioning into predominantly medium-low, medium-and medium-high-risk areas. The Lancang River source exhibited a slightly higher risk level than the Yangtze and Yellow River sources. (3) The area and fragmentation degree of landscape types were identified as key determinants of landscape ecological risk variations in the region, with spatial differentiation resulting from the combined influence of multiple driving factors. Among these, Normalized Difference Vegetation Index (NDVI), elevation, and slope were identified as the primary driving factors, with their impacts varying significantly across terrain. To ensure ecological integrity and sustain ecological functions, the government should prioritize the protection and monitoring of snow-capped glaciers, implement measures to curb grassland desertification, and prevent the resurgence of ecological risks.

Key words： landscape ecological risk; driving factors; Optimal Parameter Geographic Detector; Three River Source Region

Cite this article

WANG Chengwu , YAO Liangjie , WANG Zhoufeng , ZHANG Qiao , XIE Liang . Landscape ecological risk assessment and driving factors analysis in the Three River Source Region from 2000 to 2020[J]. Arid Zone Research, 2024 , 41(11) : 1908 -1920 . DOI: 10.13866/j.azr.2024.11.11

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