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Global variability in leaf respiration in relation to climate, plant functional types and leaf traits

Owen K. Atkin 1 Keith J. Bloomfield 1 Peter B. Reich 2, 3 Mark G. Tjoelker 2 Gregory P. Asner 4 Damien Bonal 5 Jen Bönisch 6 Matt G. Bradford 7 Lucas A. Cernusak 8 Eric G. Cosio 9 Danielle Creek 1, 2 Kristine Y. Crous 1, 2 Tomas F. Domingues 10 Jeffrey S. Dukes 11 John J. G. Egerton 1 John R. Evans 1 Graham D. Farquhar 1 Nikolaos M. Fyllas 12 Paul P. G. Gauthier 13, 1 Emanuel Gloor 14 Teresa E. Gimeno 2 Kevin L. Griffin 15 Rossella Guerrieri 16, 17 Mary A. Heskel 1 Chris Huntingford 18 Françoise Yoko Ishida 8 Jen Kattge 6 Hans Lambers 19 Michael J. Liddell 8 Jon Lloyd 20, 8 Christopher H. Lusk 21 Roberta E. Martin 4 Ayal P. Maksimov 22 Trofim C. Maximov 22 Yadvinder Malhi 23 Belinda E. Medlyn 24, 2 Patrick Meir 1, 16 Lina M. Mercado 25, 18 Nicholas Mirotchnick 26 Desmond Ng 1 Odhran S. O'Sullivan 1 Oliver L. Phillips 14 Lourens Poorter 27 Pieter Poot 19 I. Colin Prentice 20, 24 Norma Salinas 28, 9 Lucy M. Rowland 16 Michael G. Ryan 29 Stephen Sitch 25 Martijn Slot 30, 31 Nicholas G. Smith 11 Matthew H. Turnbull 28 Mark C. Vanderwel 32, 30 Fernando Valladares 33 Erik J. Veneklaas 19 Lasantha K. Weerasinghe 34, 35, 1 Christian Wirth Ian J. Wright 24 Kirk R. Wythers 3 Jen Xiang 1 Shuang Xiang 36, 1 Joana Zaragoza-Castells 16, 25
Abstract : Leaf dark respiration (R-dark) is an important yet poorly quantified component of the global carbon cycle. Given this, we analyzed a new global database of R-dark and associated leaf traits. Data for 899 species were compiled from 100 sites (from the Arctic to the tropics). Several woody and nonwoody plant functional types (PFTs) were represented. Mixed-effects models were used to disentangle sources of variation in R-dark. Area-based R-dark at the prevailing average daily growth temperature (T) of each siteincreased only twofold from the Arctic to the tropics, despite a 20 degrees C increase in growing T (8-28 degrees C). By contrast, R-dark at a standard T (25 degrees C, R-dark(25)) was threefold higher in the Arctic than in the tropics, and twofold higher at arid than at mesic sites. Species and PFTs at cold sites exhibited higher R-dark(25) at a given photosynthetic capacity (V-cmax(25)) or leaf nitrogen concentration ([N]) than species at warmer sites. R-dark(25) values at any given V-cmax(25) or [N] were higher in herbs than in woody plants. The results highlight variation in R-dark among species and across global gradients in T and aridity. In addition to their ecological significance, the results provide a framework for improving representation of R-dark in terrestrial biosphere models (TBMs) and associated land-surface components of Earth system models (ESMs).
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https://hal.univ-lorraine.fr/hal-01556923
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Submitted on : Wednesday, July 5, 2017 - 4:47:37 PM
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Owen K. Atkin, Keith J. Bloomfield, Peter B. Reich, Mark G. Tjoelker, Gregory P. Asner, et al.. Global variability in leaf respiration in relation to climate, plant functional types and leaf traits. New Phytologist, Wiley, 2015, 206 (2), pp.614 - 636. ⟨10.1111/nph.13253⟩. ⟨hal-01556923⟩

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