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Journal of Desert Research ›› 2026, Vol. 46 ›› Issue (1): 105-120.DOI: 10.7522/j.issn.1000-694X.2025.00334

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Response of arboreal forest ecosystem stability to climate change in Qilian Mountain National Park

Junwei Chen1,2(), Xuexiang Chang1,2(), Quanyan Tian1,2   

  1. 1.Inland River Basin Research Station of China Ecosystem Research Network / Key Laboratory of Eco-Environmental Security and Sustainable Development in Arid Areas,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2025-11-23 Revised:2025-12-23 Online:2026-01-20 Published:2026-03-09
  • Contact: Xuexiang Chang

Abstract:

Climate change has increased the uncertainty of ecosystem stability. As a key ecological barrier in northwestern arid region of China, the Qilian Mountains rely on arboreal forests for water conservation and ecological functioning. Identifying how climate change affects the stability of these forests is essential for adaptive management, safeguarding oasis water resources, and promoting sustainable development. Using Qilian Mountain National Park as the study area, we constructed a Forest Stability Index (FSI) based on Landsat imagery (1987-2021) and high-resolution climate data, and applied wavelet analysis and multiple linear regression to assess spatiotemporal patterns of forest stability and their responses to climate change. Results show that: (1) forest ecosystems were highly stable, with extremely high stability covering 77.25% of the area; (2) from 1991 to 2021, temperature and precipitation increased by 0.024 ℃ and 7.32 mm annually, while FSI rose significantly at 0.027 per year; (3) warming was positively associated with stability (FSI increase of 0.09-0.30 per ℃), precipitation generally had positive effects (0.15-0.68 per 1 000 mm) but was negative in Unit I (-0.26 per 1 000 mm), and the climate elasticity index (CE) showed negative effects, with each 0.10 increase reducing FSI by 1.00-1.75.

Key words: ecosystem stability, climate change, arboreal forest ecosystem, spatial heterogeneity, Qilian Mountain National Park

CLC Number: