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<p>The Desert ecosystems are among the most vulnerable ecosystems globally, and maintaining their vegetation carbon balance is crucial for ensuring regional ecological stability and achieving the United Nations Sustainable Development Goals (SDGs) and Paris Agreement established the carbon neutrality target. For this purpose, this study focusing on China's arid regions, integrated GLASS NPP, soil, topographic, and meteorological data (including 16 extreme climate indicators) from 2000 to 2022. We employed trend analysis and geographical detectors to elucidate the spatiotemporal patterns and driving mechanisms of vegetation Net Ecosystem Productivity (NEP). The results indicated: (1) From 2000 to 2022, vegetation NEP exhibited an overall fluctuating upward trend. Spatially, carbon sinks decreased gradually from the relatively humid east to the extremely arid west, with carbon sources concentrated in localized areas of Xinjiang. (2) Absorbed photosynthetically active radiation (APAR) was the dominant driver of NEP changes, followed by precipitation, with both showing significant synergistic enhancement. While single extreme climate factors had a relatively weak influence across the entire region, their impact was pronounced in semi-arid zones, particularly the monthly maximum value of daily minimum temperature (TNX). Notably, the explanatory power of factor interactions increased significantly in these vulnerable zones.&#xa0;This study not only reveals the driving mechanisms and climate response patterns of ecosystem carbon sinks in China's arid regions under extreme climate stress, but also provides important scientific support for precise ecological restoration, maintaining regional ecological security, and implementing sustainable development goals.</p>

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Response differences of vegetation NEP to multidimensional environmental driving factors in different arid regions of China

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月29日

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  • Shuya Wen,
  • Yongchun Hua,
  • Xuesong Lin,
  • Ruiting Liang,
  • Xiuzhi Ma

摘要

The Desert ecosystems are among the most vulnerable ecosystems globally, and maintaining their vegetation carbon balance is crucial for ensuring regional ecological stability and achieving the United Nations Sustainable Development Goals (SDGs) and Paris Agreement established the carbon neutrality target. For this purpose, this study focusing on China's arid regions, integrated GLASS NPP, soil, topographic, and meteorological data (including 16 extreme climate indicators) from 2000 to 2022. We employed trend analysis and geographical detectors to elucidate the spatiotemporal patterns and driving mechanisms of vegetation Net Ecosystem Productivity (NEP). The results indicated: (1) From 2000 to 2022, vegetation NEP exhibited an overall fluctuating upward trend. Spatially, carbon sinks decreased gradually from the relatively humid east to the extremely arid west, with carbon sources concentrated in localized areas of Xinjiang. (2) Absorbed photosynthetically active radiation (APAR) was the dominant driver of NEP changes, followed by precipitation, with both showing significant synergistic enhancement. While single extreme climate factors had a relatively weak influence across the entire region, their impact was pronounced in semi-arid zones, particularly the monthly maximum value of daily minimum temperature (TNX). Notably, the explanatory power of factor interactions increased significantly in these vulnerable zones. This study not only reveals the driving mechanisms and climate response patterns of ecosystem carbon sinks in China's arid regions under extreme climate stress, but also provides important scientific support for precise ecological restoration, maintaining regional ecological security, and implementing sustainable development goals.