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<p>Forest carbon sequestration depends on how trees allocate carbon between canopy productivity and stem growth, yet these processes may respond differently to climate change, creating uncertainty in estimates of plantation carbon uptake. Here, we combined tree-ring measurements with satellite observations of canopy productivity from 2000 to 2018 to examine the relationship between radial growth and canopy productivity in the four most widely planted tree species across northern China, and to assess their responses to extreme droughts in 2008–2009 and 2014–2015. We found that radial growth and canopy productivity remained broadly coupled across plantations, with stronger temporal coherence in conifers and increasing coherence in broadleaved species. Both processes showed similar climatic sensitivity, but radial growth recovered more rapidly after droughts, whereas canopy productivity recovered more slowly and often incompletely. These results suggest that plantations may regain wood production earlier than canopy productivity, with important implications for evaluating forest recovery and carbon sequestration under increasing drought stress.</p>

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Climate warming strengthened but droughts eliminated the coupling between productivity and tree growth in semi-arid plantations

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月13日

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  • Jitang Li,
  • Zehao Shen,
  • Antonio Gazol,
  • Yuyang Xie,
  • Mingjian Xiahou,
  • Jesús Julio Camarero

摘要

Forest carbon sequestration depends on how trees allocate carbon between canopy productivity and stem growth, yet these processes may respond differently to climate change, creating uncertainty in estimates of plantation carbon uptake. Here, we combined tree-ring measurements with satellite observations of canopy productivity from 2000 to 2018 to examine the relationship between radial growth and canopy productivity in the four most widely planted tree species across northern China, and to assess their responses to extreme droughts in 2008–2009 and 2014–2015. We found that radial growth and canopy productivity remained broadly coupled across plantations, with stronger temporal coherence in conifers and increasing coherence in broadleaved species. Both processes showed similar climatic sensitivity, but radial growth recovered more rapidly after droughts, whereas canopy productivity recovered more slowly and often incompletely. These results suggest that plantations may regain wood production earlier than canopy productivity, with important implications for evaluating forest recovery and carbon sequestration under increasing drought stress.