1. Climate seasonality limits carbon assimilation and storage in tropical forests
- Author
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Wagner, Fabien, Hérault, Bruno, Bonnal, Damien, Stahl, Clément, Anderson, Liana O., Baker, Timothy R., Becker, Gabriel Sebastian, Beeckman, Hans, Boanerges Souza, Danilo, Botosso, Paulo Cesar, Bowman, David M.J.S., Bräuning, Achim, Brede, Benjamin, Brown, Foster Irving, Camarero, Jesus Julio, Barbosa de Camargo, Plínio, Cardoso, Fernanda C.G., Alvim Carvalho, Fabrício, Castro, Wendeson, Koloski Chagas, Rubens, Chave, Jérôme, Chidumayo, Emmanuel N., Clark, Deborah A., Capellotto Costa, Flavia Regina, Couralet, Camille, da Silva Mauricio, Paulo Henrique, Dalitz, Helmut, Resende de Castro, Vinicius, de Freitas Milani, Jaçanan Eloisa, de Oliveira, Edilson Consuelo, de Souza Arruda, Luciano, Devineau, Jean-Louis, Drew, Davd M., Dünisch, Olivier, Durigan, Giselda, Elifuraha, Elisha, Fedele, Marcio, Ferreira Fedele, Ligia, Figueiredo Filho, Afonso, Guimarães Finger, César Augusto, Franco, Augusto César, Freitas Júnior, João Lima, Galvão, Franklin, Gebrekirstos, Aster, Gliniars, Robert, de Alencastro Graça, Paulo Maurício Lima, Griffiths, Anthony D., Grogan, James, Guan, Kaiyu, Homeier, Jürgen, Kanieski, Maria Raquel, Khoon Kho, Lip, Koenig, Jennifer, kohler, Sintia Valerio, Krepkowski, Julia, Lemos-Filho, José Pires, Lieberman, Diana, Lieberman, Milton Eugene, Lisi, Claudio Sergio, Longhi Santos, Tomaz, López Ayala, José Luis, Eijji Maeda, Eduardo, Malhi, Yadvinder, Maria, Vivian R.B., Marques, Marcia C.M., Marques, Renato, Maza Maza Chamba, Hector, Mbwambo, Lawrence, Lisboa Melgaço, Karina Liana, Mendivelso, Hooz Angela, Murphy, Brett P., O'Brien, Joseph J., Oberbauer, Steven F., Okada, Naoki, Pélissier, Raphaël, Prior, Lynda D., Roig, Fidel Alejandro, Ross, Michael, Rossatto, Davi Rodrigo, and Rossi, Vivien
- Subjects
Litière forestière ,Saison ,Pluviométrie ,F60 - Physiologie et biochimie végétale ,Lumière ,forêt tropicale ,Bois ,K01 - Foresterie - Considérations générales ,Photosynthèse ,Climat ,Indice de surface foliaire ,Évapotranspiration ,séquestration du carbone ,Écosystème forestier ,production ,Cycle du carbone - 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 associate 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. Precipitation first-order control indicates an overall decrease in tropical forest productivity in a drier climate.
- Published
- 2016