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

Authors :
Vanderwel, Mark C.
Slot, Martijn
Lichstein, Jeremy W.
Reich, Peter B.
Kattge, Jens
Atkin, Owen K.
Bloomfield, Keith J.
Tjoelker, Mark G.
Kitajima, Kaoru
Source :
New Phytologist; Sep2015, Vol. 207 Issue 4, p1026-1037, 12p, 2 Charts, 4 Graphs
Publication Year :
2015

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0028646X
Volume :
207
Issue :
4
Database :
Complementary Index
Journal :
New Phytologist
Publication Type :
Academic Journal
Accession number :
108674301
Full Text :
https://doi.org/10.1111/nph.13417