Optimal stomatal behaviour around the world

Yan-Shih Lin 1, * Belinda E. Medlyn 1 Remko A. Duursma 2 I. Colin Prentice 1 Han Wan 3, 1 Sofia Baig 1 Derek Eamus 4 Victor resco De Dios 5 Patrick Mitchell 6 David S. Ellsworth 2 Maarten Op De Beeck 7 Göran Wallin 8 Johan Uddling 8 Lasse Tarvainen 9 Maj-Lena Linderson 10 Lucas A. Cernusak 11 Jesse B. Nippert 12 Troy W. Ocheltree 13 David T. Tissue 1 Nicolas K. Martin-St Paul 14 Alistair Rogers 15 Jeff M. Warren 16 Paolo De Angelis 17 Kouki Hikosaka 18 Qingmin Han 19 Yusuke Onoda 20 Teresa E. Gimeno 1 Craig V. M. Barton 2 Jonathan Bennie 21 Damien Bonal 22 Alexandre Bosc 23, 24 Markus Löw 25 Cate Macinins-Ng 26 Ana Rey 27 Lucy Rowland 28 Samantha A. Setterfield 29 Sabine Tausz-Posch 25 Joana Zaragoza-Castells 28 Mark S. J. Broadmeadow 30 John E. Drake 2 Michael Freeman 9 Oula Ghannoum 2 Lindsay b. Hutley 29 Jeff W. Kelly 1 Kihachiro Kikuzawa 31 Pasi Kolari 32 Kohei Koyama 33, 31 Jean-Marc Limousin Patrick Meir 28 Antonio C. Lola da Costa 34 Teis N. Mikkelsen 35 Norma Salinas 36, 37 Wei Sun 38 Lisa Wingate 24
* Auteur correspondant
Abstract : Stomatal conductance (g(s)) is a key land-surface attribute as it links transpiration, the dominant component of global land evapotranspiration, and photosynthesis, the driving force of the global carbon cycle. Despite the pivotal role of g(s) in predictions of global water and carbon cycle changes, a global-scale database and an associated globally applicable model of g(s) that allow predictions of stomatal behaviour are lacking. Here, we present a database of globally distributed g(s) obtained in the field for a wide range of plant functional types (PFTs) and biomes. We find that stomatal behaviour differs among PFTs according to their marginal carbon cost of water use, as predicted by the theory underpinning the optimal stomatal model(1) and the leaf and wood economics spectrum(2,3). We also demonstrate a global relationship with climate. These findin g(s) provide a robust theoretical framework for understanding and predicting the behaviour of g(s) across biomes and across PFTs that can be applied to regional, continental and global-scale modelling of ecosystem productivity, energy balance and ecohydrological processes in a future changing climate.
Type de document :
Article dans une revue
Nature Climate Change, Nature Publishing Group, 2015, 5 (5), pp.459 - 464. 〈10.1038/NCLIMATE2550〉
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Yan-Shih Lin, Belinda E. Medlyn, Remko A. Duursma, I. Colin Prentice, Han Wan, et al.. Optimal stomatal behaviour around the world. Nature Climate Change, Nature Publishing Group, 2015, 5 (5), pp.459 - 464. 〈10.1038/NCLIMATE2550〉. 〈hal-01557450〉



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