Tree diversity increases forest temperature buffering via enhancing canopy density and structural diversity

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Authors

  • Florian Schnabel
  • Rémy Beugnon
  • Bo Yang
  • Ronnie Richter
  • Nico Eisenhauer
  • Yuanyuan Huang
  • Xiaojuan Liu
  • Christian Wirth
  • Simone Cesarz
  • María Dolores Perles-García
  • Georg Hähn
  • Matthias Kunz
  • Nadia Castro-Izaguirre
  • Pascal A. Niklaus
  • Goddert von Oheimb
  • Bernhard Schmid
  • Stefan Trogisch
  • Manfred Wendisch
  • Keping Ma
  • Helge Bruelheide

Global warming is increasing the frequency and intensity of climate extremes. Forests may buffer climate extremes by creating their own attenuated microclimate below their canopy, which maintains forest functioning and biodiversity. However, the effect of tree diversity on temperature buffering in forests is largely unexplored. Here, we show that tree species richness increases forest temperature buffering across temporal scales over six years in a large-scale tree diversity experiment covering a species richness gradient of 1 to 24 tree species. We found that species richness strengthened the cooling of hot and the insulation against cold daily and monthly air temperatures and temperature extremes. This buffering effect of tree species richness was mediated by enhanced canopy density and structural diversity in species-rich stands. Safeguarding and planting diverse forests may thus mitigate negative effects of global warming and climate extremes on below-canopy ecosystem functions and communities.

Original languageEnglish
Article numbere70096
JournalEcology Letters
Volume28
Issue number3
Pages (from-to)1-11
Number of pages11
ISSN1461-023X
DOIs
Publication statusPublished - 01.03.2025

Bibliographical note

Publisher Copyright:
© 2025 The Author(s). Ecology Letters published by John Wiley & Sons Ltd.

DOI

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