Climate seasonality limits leaf carbon assimilation and wood productivity in tropical forests

Fabien H. Wagner 1, * Bruno Hérault 2 Damien Bonal 3 Clément Stahl 2 Liana O. Anderson 1 Timothy R. Baker 4 Gabriel Sebastian Becker 5 Hans Beeckman 6 Danilo Boanerges Souza 7 Paulo Cesar Botosso 8 David M. Bowman 9 Achim Bräuning 10 Benjamin Brede 11 Foster Irving Brown 12 Jesus Julio Camarero 13 Plínio Barbosa Camargo 14 Fernanda C. G. Cardoso 15 Fabrício Alvim Carvalho 16 Wendeson Castro 12 Rubens Koloski Chagas 14 Jérome Chave 17 Emmanuel N. Chidumayo 18 Deborah A. Clark 19 Flavia Regina Capellotto Costa 7 Camille Couralet 6 Paulo Henrique Silva 12 Helmut Dalitz 5 Vinicius Resende De Castro 20 Jaçanan Eloisa De Freitas Milani 15 Edilson Consuelo De Oliveira 12 Luciano De Souza Arruda 21 Jean-Louis Devineau 22 David M. Drew 23 Oliver Dünisch 24 Giselda Durigan 25 Elisha Elifuraha 26 Marcio Fedele 14 Ligia Ferreira Fedele 14 Afonso Figueiredo Filho 27 César Augusto Guimarães Finger 28 Augusto César Franco 29 João Lima Freitas Júnior 12 Franklin Galvão 15 Aster Gebrekirstos 30 Robert Gliniars 5 Paulo Maurício Lima de Alencastro Graça 7 Anthony D. Griffiths 31 James Grogan 32 Kaiyu Guan 33 Jürgen Homeier 34 Maria Raquel Kanieski 35 Lip Khoon Kho 36 Jennifer Koenig 37 Sintia Valerio Kohler 27 Julia Krepkowski 10 José Pires Lemos-Filho 38 Diana Lieberman 39 Milton Eugene Lieberman 39 Claudio Sergio Lisi 14 Tomaz Santo 15 José Luis López Ayala 40 Eduardo Eijji Maeda 41 Yadvinder Malhi 42 Vivian R. B. Maria 14 Marcia C. M. Marques 15 Renato Marques 15 Hector Maza Chamba 43 Lawrence Mbwambo 26 Karina Liana Lisboa Melgaço 7 Hooz Angela Mendivelso 13 Brett P. Murphy 37 Joseph J. O'brien 44 Steven F. Oberbauer 45 Naoki Okada 46 Raphaël Pélissier 47 Lynda D. Prior 9 Fidel Alejandro Roig 48 Michael Ross 49 Davi Rodrigo Rossatto 50 Vivien Rossi 51 Lucy Rowland 52 Ervan Rutishauser 53 Hellen Santana 7 Mark Schulze 54 Diogo Selhorst 55 Williamar Rodrigues Silva 56 Marcos Silveira 12 Susanne Spannl 10 Michael D. Swaine 57 José Julio Toledo 58 Marcos Miranda Toledo 59 Marisol Toledo 60 Takeshi Toma 61 Mario Tomazello Filho 14 Juan Ignacio Valdez Hernández 40 Jan Verbesselt 11 Simone Aparecida Vieira 62 Grégoire Vincent 47 Carolina Volkmer de Castilho 56 Franziska Volland 10 Martin Worbes 34 Magda Lea Bolzan Zanon 63 Luiz E. O. C. Aragão 1
* Auteur correspondant
Abstract : The seasonal climate drivers of the carbon cycle in tropical forests remain poorly known, although these forests account for more carbon assimilation and storage than any other terrestrial ecosystem. Based on a unique combination of seasonal pan-tropical data sets from 89 experimental sites (68 include aboveground wood productivity measurements and 35 litter productivity measurements), their associated canopy photosynthetic capacity (enhanced vegetation index, EVI) and climate, we ask how carbon assimilation and aboveground allocation are related to climate seasonality in tropical forests and how they interact in the seasonal carbon cycle. We found that canopy photosynthetic capacity seasonality responds positively to precipitation when rainfall is < 2000 mm yr(-1) (water-limited forests) and to radiation otherwise (light-limited forests). On the other hand, independent of climate limitations, wood productivity and litterfall are driven by seasonal variation in precipitation and evapotranspiration, respectively. Consequently, light-limited forests present an asynchronism between canopy photosynthetic capacity and wood productivity. First-order control by precipitation likely indicates a decrease in tropical forest productivity in a drier climate in water-limited forest, and in current light-limited forest with future rainfall < 2000 mm yr(-1).
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Biogeosciences, European Geosciences Union, 2016, 13 (8), pp.2537-2562. 〈10.5194/bg-13-2537-2016〉
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Fabien H. Wagner, Bruno Hérault, Damien Bonal, Clément Stahl, Liana O. Anderson, et al.. Climate seasonality limits leaf carbon assimilation and wood productivity in tropical forests. Biogeosciences, European Geosciences Union, 2016, 13 (8), pp.2537-2562. 〈10.5194/bg-13-2537-2016〉. 〈hal-01557759〉

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