Produção Nacional
Revisado por pares
Long-term decline of the Amazon carbon sink
2015; Nature Portfolio; Volume: 519; Issue: 7543 Linguagem: Inglês
10.1038/nature14283
ISSN1476-4687
AutoresRoel Brienen, Oliver L. Phillips, Ted R. Feldpausch, Emanuel Gloor, Timothy R. Baker, Jon Lloyd, Gabriela López‐González, Abel Monteagudo‐Mendoza, Yadvinder Malhi, Simon L. Lewis, Rodolfo Vásquez, Miguel N. Alexiades, Esteban Álvarez‐Dávila, Patricia Álvarez-Loayza, Ana Andrade, L. E. O. C. Aragão, Alejandro Araujo‐Murakami, E.J.M.M. Arets, L. Arroyo, G. A. Aymard C., Olaf Bánki, Christopher Baraloto, Jorcely Barroso, Damien Bonal, R. G. A. Boot, José Luís Camargo, Víctor Chama Moscoso, V. Chama, Kuo‐Jung Chao, Jérôme Chave, J. A. Comiskey, Fernando Cornejo Valverde, L. da Costa, E. A. de Oliveira, Anthony Di Fiore, T. Erwin, Sophie Fauset, M. Forsthofer, David Galbraith, E. Suzanne Grahame, Nikée Groot, Bruno Hérault, N. Higuchi, Eurídice N. Honorio Coronado, Helen C. Keeling, Tim J. Killeen, W. F. Laurance, Susan G. W. Laurance, Juan Carlos Licona, W. E. Magnussen, Beatriz Schwantes Marimon, Ben Hur Marimon, C. Mendoza, David Neill, Euler Melo Nogueira, P. Núñez, Nadir Pallqui Camacho, Alexander Parada, G. Pardo‐Molina, J. Peacock, Marielos Peña‐Claros, G. C. Pickavance, Nigel C. A. Pitman, Lourens Poorter, Adriana Prieto, C. A. Quesada, Fredy Ramírez, H. Ramírez-Angulo, Zorayda Restrepo, Adriana Prieto, A. Rudas, Rafael P. Salomão, Michael P. Schwarz, N. Silva, Javier E. Silva‐Espejo, Marcos Silveira, J. Stropp, Joey Talbot, Hans ter Steege, J. Teran-Aguilar, J. Terborgh, Raquel Thomas‐Caesar, M. Toledo, M. Torello-Raventos, Ricardo Keichi Umetsu, Geertje van der Heijden, P. van der Hout, Ima Célia Guimarães Vieira, Simone Aparecida Vieira, Emilio Vilanova, Vincent Antoine Vos, Roderick Zagt,
Tópico(s)Ecology and Vegetation Dynamics Studies
ResumoAtmospheric carbon dioxide records indicate that the land surface has acted as a strong global carbon sink over recent decades, with a substantial fraction of this sink probably located in the tropics, particularly in the Amazon. Nevertheless, it is unclear how the terrestrial carbon sink will evolve as climate and atmospheric composition continue to change. Here we analyse the historical evolution of the biomass dynamics of the Amazon rainforest over three decades using a distributed network of 321 plots. While this analysis confirms that Amazon forests have acted as a long-term net biomass sink, we find a long-term decreasing trend of carbon accumulation. Rates of net increase in above-ground biomass declined by one-third during the past decade compared to the 1990s. This is a consequence of growth rate increases levelling off recently, while biomass mortality persistently increased throughout, leading to a shortening of carbon residence times. Potential drivers for the mortality increase include greater climate variability, and feedbacks of faster growth on mortality, resulting in shortened tree longevity. The observed decline of the Amazon sink diverges markedly from the recent increase in terrestrial carbon uptake at the global scale, and is contrary to expectations based on models.
Referência(s)