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Scientia Silvae Sinicae ›› 2025, Vol. 61 ›› Issue (9): 48-58.doi: 10.11707/j.1001-7488.LYKX20230763

• Research papers • Previous Articles    

Spatio-temporal Pattern of Vegetation Resilience and Its Response to Extreme Climate in Inner Mongolia Autonomous Region

Xiaoyan Yu1,2,3,Yaxian Gao1,2,3,Guangpu Wei1,*(),Shuyu Zhang1,Wenjun Zhang1,2,3   

  1. 1. Inner Mongolia University of Science and Technology Baotou 014010
    2. Yellow River Jiziwan Development Research Institute Baotou 014010
    3. Research Center of Industrial Informationization and Innovation in Inner Mongolia University of Science and Technology Baotou 014010
  • Received:2024-12-05 Online:2025-09-25 Published:2025-10-10
  • Contact: Guangpu Wei E-mail:Wei_Guangpu@imust.edu.cn

Abstract:

Objective: This study aims to analyze the temporal and spatial changes of vegetation resilience in Inner Mongolia Autonomous Region and the impacts of extreme climate on vegetation resilience, revealing the trend and mechanisms of changes in vegetation resilience under extreme climate conditions. Method: Vegetation coverage and vegetation resilience in Inner Mongolia from 2004 to 2023 were assessed with the constructed kernel normalized vegetation index (kNDVI) dataset based on the satellite (MOD 13 Q1 V6.1) and early warning indicators. In addition, based on the daily meteorological data from the U.S. National Centers for Environmental Information (NCEI), 15 extreme climate indices such as extreme temperature and extreme precipitation were calculated for the region. On the basis of a comprehensive analysis of the spatial and temporal characteristics of extreme climate, Pearson correlation analysis and geographical detectors were used to quantitatively assess the impacts of extreme climate on the vegetation resilience in Inner Mongolia. Result: 1) Approximately 85.63% of the areas in Inner Mongolia showed an increasing trend in vegetation coverage, while the vegetation coverage in the Daxinganling forest area and the western edge desert area had a decreasing trend. Approximately 57.46% of the areas in Inner Mongolia showed an increasing trend in vegetation resilience, and the spatial trend showed the pattern of increasing in the eastern and the grassland area at the southern end of the Daxinganling and decreasing in the Daxinganling forest area and the western desert and desert grassland area. 2) From 2004 to 2023, the extreme warmth index showed an increasing trend, with an increase in extreme high temperature events. The extreme intensity and frequency precipitation index showed an increasing trend, and extreme precipitation events were enhanced in intensity and frequency. 3) The correlation between extreme climate indices and vegetation resilience showed obvious spatial heterogeneity, intensity indices such as TNx and TXx showed a positive correlation with vegetation resilience in more than 60% of the region, and extreme low temperature indices (TN10p and TX10p) were mostly positively correlated with vegetation resilience in the western desert area and the Daxing'anling forest area. 4) TN90p and TX90p contributed significantly to resilience enhancement in the eastern steppe zone. The extreme precipitation indices, such as RX5day, RX1day, R20mm, and R10mm, showed significantly positive correlation with vegetation resilience in the central and eastern areas, and had a high explanatory power for vegetation resilience, indicating that the intensity and frequency of extreme precipitation had a greater influence on vegetation changes in Inner Mongolia. Conclusion: The spatial heterogeneity of vegetation resilience and climate extremes in the Inner Mongolia Autonomous Region is obvious, and the main factor affecting vegetation resilience is the extreme precipitation events and vegetation resilience is most sensitive to extreme precipitation intensity. Therefore, in future strategies for vegetation protection and restoration, priority should be given to the stability and sustainability of ecosystems, with full consideration of the climatic characteristics and vegetation restoration potential in different ecological zones, and more attention to water resource management and extreme climate change.

Key words: kNDVI (kernel normalized difference vegetation index), vegetation resilience, extreme climates, spatial-temporal change, Inner Mongolia

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