干旱区研究

Arid Zone Research >

2023 , Vol. 40 >Issue 6: 1002 - 1013

DOI: https://doi.org/10.13866/j.azr.2023.06.15

Ecology and Environment

Spatial and temporal evolution of ecological vulnerability and its influencing factors in the Hehuang area

  • Runze QI ,
  • Jinghu PAN
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  • College of Geography and Environmental Science of Northwest Normal University, Lanzhou 730070, Gansu, China

Received date: 2022-10-26

  Revised date: 2023-03-09

  Online published: 2023-06-21

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Abstract

An evaluation index system was constructed based on a concept model for exposure sensitivity adaptation ecological vulnerability. A projection pursuit model and genetic algorithm were used to determine the index weight, and the ecological vulnerability index was calculated for the Hehuang region. Spatio-temporal scanning was used to explore the spatial aggregation characteristics and spatio-temporal change laws for ecological vulnerability. The factors influencing ecological vulnerability were explored with the aid of geographical detectors. From 2000 to 2020, the ecological vulnerability of the Hehuang region was found to predominately be light and medium, with obvious regional differences in the spatial distribution. Ecological vulnerability has obvious characteristics for time and local spatial aggregation. High value aggregation and low value aggregation can coexist, and spatial aggregation is mainly distributed in Gansu Province. From 2000 to 2020, the ecological vulnerability of 53.36% of the land decreased. The most influential factor on ecological vulnerability is vegetation coverage, followed by desertification index, net primary productivity of vegetation, drought index, habitat quality index, and altitude.

Key words： ecological vulnerability; ecological protection of the Yellow River basin; spatio-temporal scanning; geographic detector; influence factors; Hehuang area

Cite this article

Runze QI , Jinghu PAN . Spatial and temporal evolution of ecological vulnerability and its influencing factors in the Hehuang area[J]. Arid Zone Research, 2023 , 40(6) : 1002 -1013 . DOI: 10.13866/j.azr.2023.06.15

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