Global convergence in leaf respiration from estimates of thermal acclimation across time and space

Mark C. Vanderwel, Martijn Slot, Jeremy W. Lichstein, Peter B. Reich, Jens Kattge, Owen K. Atkin, Keith J. Bloomfield, Mark G. Tjoelker, Kaoru Kitajima

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Recent compilations of experimental and observational data have documented global temperature-dependent patterns of variation in leaf dark respiration (R), but it remains unclear whether local adjustments in respiration over time (through thermal acclimation) are consistent with the patterns in R found across geographical temperature gradients. We integrated results from two global empirical syntheses into a simple temperature-dependent respiration framework to compare the measured effects of respiration acclimation-over-time and variation-across-space to one another, and to a null model in which acclimation is ignored. Using these models, we projected the influence of thermal acclimation on: seasonal variation in R; spatial variation in mean annual R across a global temperature gradient; and future increases in R under climate change. The measured strength of acclimation-over-time produces differences in annual R across spatial temperature gradients that agree well with global variation-across-space. Our models further project that acclimation effects could potentially halve increases in R (compared with the null model) as the climate warms over the 21st Century. Convergence in global temperature-dependent patterns of R indicates that physiological adjustments arising from thermal acclimation are capable of explaining observed variation in leaf respiration at ambient growth temperatures across the globe.

Original languageEnglish (US)
Pages (from-to)1026-1037
Number of pages12
JournalNew Phytologist
Volume207
Issue number4
DOIs
StatePublished - Sep 1 2015

Bibliographical note

Publisher Copyright:
© 2015 New Phytologist Trust.

Keywords

  • Autotrophic respiration
  • Carbon flux
  • Climate change
  • Temperature
  • Terrestrial biosphere modelling
  • Thermal acclimation

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