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  • May. 14, 2025

Arid Land Geography ›› 2025, Vol. 48 ›› Issue (4): 673-688.doi: 10.12118/j.issn.1000-6060.2024.392

• Ecology and Environment • Previous Articles     Next Articles

Spatiotemporal dynamics and driving forces of grassland health in Tacheng Prefecture from 2001 to 2020

XING Mengxiang1,2(), ZHENG Jianghua1,2(), LI Gangyong3,4, PENG Jian3,4, Kaisa MIJITI3,4, LIU Liang1,2, ZHANG Jianli3,4, MA Lisha1,2, LU Jiantao1,2   

  1. 1. College of Geography and Remote Sensing, Xinjiang University, Urumqi 830046, Xinjiang, China
    2. Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi 830046, Xinjiang, China
    3. Xinjiang Grassland Technical Promotion Station, Urumqi 830049, Xinjiang, China
    4. Joint Laboratory for Remote Sensing Observation of Grassland Ecosystem in Arid Area, Urumqi 830049, Xinjiang, China
  • Received:2024-06-25 Revised:2024-12-30 Online:2025-04-25 Published:2025-04-18
  • Contact: ZHENG Jianghua E-mail:107552201169@stu.xju.edu.cn;zheng.jianghua@xju.edu.cn

Abstract:

As an important agricultural and pastoral area, Tacheng Prefecture, Xinjiang, China requires an in-depth study of grassland health to support conservation efforts and grazing management. However, the long-term spatiotemporal dynamics of grassland health and its driving forces across different grassland types remain insufficiently explored. This study constructs a “pressure-state-response” model using 15 indicators and employs spatial principal component analysis, the coefficient of variation, the Hurst index, spatial autocorrelation, and the geographic detector method to evaluate the spatiotemporal dynamics of grassland health and its driving forces inTacheng Prefecture from 2001 to 2020. The results indicate that: (1) Temporally, the grassland health index inTacheng Prefecture exhibits a fluctuating downward trend. The warning and collapse levels show opposite trends, whereas the sub-healthy and healthy levels remain relatively stable. (2) Spatially, the multi-year average grassland health levels transition from sub-healthy to warning and collapse states from west to east. Most grassland types predominantly fall within the sub-healthy category. (3) Regarding future trends, grassland health in Tacheng Prefecture is expected to continue declining, particularly in Tacheng City, southern Emin County, and northern Hoboksar Mongolian Autonomous County. (4) In terms of driving factors, vegetation is the primary determinant of grassland health, and factor interactions enhance its effects more significantly than single factors. Human activities and socio-economic factors also interact with vegetation, further influencing grassland health. These findings provide a theoretical basis and valuable reference for future grassland planning and management in Tacheng Prefecture.

Key words: “pressure-state-response” model, grassland health, Hurst index, geographic detector, Tacheng Prefecture