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Spatiotemporal Variation in and Responses of the NDVI to Climate in Western Ordos and Eastern Alxa

Author

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  • Hui Zhang

    (College of Life Sciences and Technology, Inner Mongolia Normal University, Hohhot 010022, China
    These authors contribute equally to this work.)

  • Jinting Guo

    (College of Life Sciences and Technology, Inner Mongolia Normal University, Hohhot 010022, China
    Key Laboratory of Biodiversity Conservation and Sustainable Utilization for College and University of Inner Mongolia Autonomous Region, Hohhot 010022, China
    These authors contribute equally to this work.)

  • Xiaotian Li

    (College of Life Sciences and Technology, Inner Mongolia Normal University, Hohhot 010022, China)

  • Yajie Liu

    (College of Life Sciences and Technology, Inner Mongolia Normal University, Hohhot 010022, China)

  • Tiejuan Wang

    (College of Life Sciences and Technology, Inner Mongolia Normal University, Hohhot 010022, China
    Key Laboratory of Biodiversity Conservation and Sustainable Utilization for College and University of Inner Mongolia Autonomous Region, Hohhot 010022, China)

Abstract

Vegetation is an important component of the terrestrial ecosystem, and studying the rules of vegetation change and its driving factors is helpful to strengthen the ecological protection and sustainable development of regional vegetation. This study analyzes the changes in Normalized Difference Vegetation Index (NDVI) and its response to climate factors in the five regions of western Ordos and eastern Alxa in China between 2000 and 2020. The MODIS NDVI and meteorological data from 2000 to 2020 was used and the ordinary least squares, trend analysis, and correlation analysis methods were analyzed. The NDVI in this region shows spatial differentiation and is high in the east and low in the west. The overall NDVI has shown a significant increasing trend ( p < 0.01), and the slope value of the rate of change also shows that the NDVI in 98.17% of the area is increasing. On a temporal scale, NDVI had a significant positive correlation with precipitation ( p < 0.01), but no significant correlation with temperature changes. On a spatial scale, NDVI was positively correlated with precipitation, which accounted for 95.57% of spatial changes, of which a significant positive correlation accounted for 34.99% ( p < 0.05). Meanwhile, the temperature and NDVI were negatively correlated but not significantly. A positive correlation accounted for 45.95% of the change, but the insignificant negative correlation accounted for 54.05%. Therefore, comprehensive analysis showed that precipitation played a leading role in the NDVI in the study area. The results are helpful to study the driving mechanism of vegetation growth and provide reference for vegetation protection in regions of western Ordos and eastern Alxa of Inner Mongolia, China.

Suggested Citation

  • Hui Zhang & Jinting Guo & Xiaotian Li & Yajie Liu & Tiejuan Wang, 2023. "Spatiotemporal Variation in and Responses of the NDVI to Climate in Western Ordos and Eastern Alxa," Sustainability, MDPI, vol. 15(5), pages 1-12, March.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:5:p:4375-:d:1084379
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    References listed on IDEAS

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    1. Yunfeng Hu & Rina Dao & Yang Hu, 2019. "Vegetation Change and Driving Factors: Contribution Analysis in the Loess Plateau of China during 2000–2015," Sustainability, MDPI, vol. 11(5), pages 1-16, March.
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    Cited by:

    1. Linye Zhu & Yonggui Zhang & Kewen Chen & Qiang Liu & Wenbin Sun, 2023. "Exploring Land-Cover Types and Their Changes in the Open-Pit Mining Area of Ordos City Using Sentinel-2 Imagery," Sustainability, MDPI, vol. 15(19), pages 1-14, September.

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