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<p>Canopy structural diversity varies systematically with climate and species diversity across boreal, temperate, and tropical biomes. Yet, how this latitudinal variation affects forest productivity—particularly the role of structural diversity in mediating effects of climate on productivity across biomes—remains unresolved. By synthesizing airborne laser scanning data and ground-based forest inventories spanning boreal to tropical forests, we show that beyond its direct effects on forest productivity, climate influences productivity indirectly by regulating canopy structural diversity—a significant, yet previously underappreciated mechanism whose precise magnitude is challenging to isolate. Notably, we observe a pronounced latitudinal congruence between hotspots of structural diversity and productivity. This positions structural diversity not only as a complementary indicator of productivity but also as a critical mediator of the influence of climate and species diversity, essential for improved forecasting.</p>

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Canopy structural diversity mediates the effect of climate on primary productivity in forests

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月11日

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  • Xiaoxia Yi,
  • Grégoire Vincent,
  • Tianyu Hu,
  • Jianli Liu,
  • James A. Lutz,
  • Haibao Ren,
  • Lei Chen,
  • David F. R. P. Burslem,
  • Joseph D. Birch,
  • Min Cao,
  • James W. Dalling,
  • David A. Coomes,
  • Géraldine Derroire,
  • Hu Du,
  • Shuai Fang,
  • Guangze Jin,
  • Jinbo Li,
  • Fei Lin,
  • Hongwei Ni,
  • Michael J. O’Brien,
  • Guochun Shen,
  • Xihua Wang,
  • Xingyu Wang,
  • Jie Yang,
  • Fuping Zeng,
  • Daoguang Zhu,
  • Yan Zhu,
  • Yanjun Su,
  • Qinghua Guo,
  • Keping Ma,
  • Xiangcheng Mi

摘要

Canopy structural diversity varies systematically with climate and species diversity across boreal, temperate, and tropical biomes. Yet, how this latitudinal variation affects forest productivity—particularly the role of structural diversity in mediating effects of climate on productivity across biomes—remains unresolved. By synthesizing airborne laser scanning data and ground-based forest inventories spanning boreal to tropical forests, we show that beyond its direct effects on forest productivity, climate influences productivity indirectly by regulating canopy structural diversity—a significant, yet previously underappreciated mechanism whose precise magnitude is challenging to isolate. Notably, we observe a pronounced latitudinal congruence between hotspots of structural diversity and productivity. This positions structural diversity not only as a complementary indicator of productivity but also as a critical mediator of the influence of climate and species diversity, essential for improved forecasting.