干旱区研究

Arid Zone Research >

2023 , Vol. 40 >Issue 6: 1014 - 1026

DOI: https://doi.org/10.13866/j.azr.2023.06.16

Ecology and Environment

Spatio-temporal changes and driving forces in the ecological environment of Altay City determined using an MRSEI model

  • Xiao LIU ,
  • Peng GUO ,
  • Jiafeng QI ,
  • Wenling DU ,
  • Ruqian ZHANG ,
  • Kun ZHANG
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  • 1. College of Science, Shihezi University, Shihezi 832003, Xinjiang, China
    2. Key Laboratory of Oasis Town and Mountain Basin System, Shihezi 832003, Xinjiang, China

Received date: 2022-09-24

  Revised date: 2023-03-31

  Online published: 2023-06-21

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Abstract

To evaluate the ecological environment of Altay City in Xinjiang in a timely, objective, and quantitative manner, an improved remote sensing ecological index (MRSEI) was constructed based on multi-source remote sensing data. The spatial and temporal variation characteristics were then analyzed by combining a standard deviation ellipse and gravity center migration model. A geographical detector model was used to detect the five indicators, which were greenness, dryness, humidity, temperature, and air quality. (1) From 2015 to 2021, the greenness and humidity indexes of Altay City showed a significant positive correlation with the ecological environment in the region. In contrast, the three indexes for temperature, dryness, and air quality showed significant negative correlations. (2) From 2015 to 2021, the average value of the MRSEI in Altay City increased. The spatial migration ability of ecological index areas I and II was strong, while III-V were relatively stable in the spatial structure. The center of gravity for ecological index areas I-IV moved north, while the center of gravity for area V moved south, indicating that the distribution of the high ecological index in the south of Altay City increased significantly. (3) The dominant factors causing the changes in the eco-environmental quality differed each year. The spatial evolution of eco-environmental quality in Altay is the result of multiple factors. (4) The differences in spatial distribution and the differences between the MRSEI and RSEI data are related to the spatial distribution of AOD, indicating that even if Altay City had improved air quality, AOD would still have an impact on the ecological quality of the spatial distribution. From 2015 to 2021, the ecological environment of Altay City was thus found to be affected by many factors and tended to improve toward the south.

Key words： modified remote sensing ecological index; ecological environment quality; geographical detector; center of gravity migration model; Altay City

Cite this article

Xiao LIU , Peng GUO , Jiafeng QI , Wenling DU , Ruqian ZHANG , Kun ZHANG . Spatio-temporal changes and driving forces in the ecological environment of Altay City determined using an MRSEI model[J]. Arid Zone Research, 2023 , 40(6) : 1014 -1026 . DOI: 10.13866/j.azr.2023.06.16

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