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Type: Artigo
Title: Long-term decline of the Amazon carbon sink
Author: Brienen, R. J. W.
Brienen, RJW
Feldpausch, TR
Gloor, E
Lloyd, J
Lopez-Gonzalez, G
Monteagudo-Mendoza, A
Malhi, Y
Lewis, SL
Alexiades, M
Davila, EA
Alvarez-Loayza, P
Andrade, A
Aragao, LEOC
Araujo-Murakami, A
Arets, EJMM
Arroyo, L
Aymard, GA
Banki, OS
Baraloto, C
Barroso, J
Bonal, D
Boot, RGA
Camargo, JLC
Castilho, CV
Chama, V
Chao, KJ
Chave, J
Comiskey, JA
Valverde, FC
da Costa, L
de Oliveira, EA
Di Fiore, A
Erwin, TL
Fauset, S
Forsthofer, M
Galbraith, DR
Grahame, ES
Herault, B
Higuchi, N
Coronado, ENH
Keeling, H
Killeen, TJ
Laurance, WF
Laurance, S
Licona, J
Magnussen, WE
Marimon, BS
Marimon, BH
Mendoza, C
Neill, DA
Nogueira, EM
Nunez, P
Camacho, NCP
Parada, A
Pardo-Molina, G
Peacock, J
Pena-Claros, M
Pickavance, GC
Pitman, NCA
Poorter, L
Prieto, A
Quesada, CA
Ramirez, F
Ramirez-Angulo, H
Restrepo, Z
Roopsind, A
Rudas, A
Salomao, RP
Schwarz, M
Silva, N
Silva-Espejo, JE
Silveira, M
Stropp, J
Talbot, J
ter Steege, H
Teran-Aguilar, J
Terborgh, J
Thomas-Caesar, R
Toledo, M
Torello-Raventos, M
Umetsu, RK
Van der Heijden, GMF
Van der Hout, P
Vieira, ICG
Vieira, SA
Vilanova, E
Vos, VA
Zagt, RJ
Abstract: Atmospheric carbon dioxide records indicate that the land surface has acted as a strong global carbon sink over recent decades1,2, with a substantial fraction of this sink probably located in the tropics3, particularly in the Amazon4. 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 longevity5. The observed decline of the Amazon sink diverges markedly from the recent increase in terrestrial carbon uptake at the global scale1,2, and is contrary to expectations based on models
Subject: Carbono
Country: Reino Unido
Editor: Springer
Rights: Fechado
Identifier DOI: 10.1038/nature14283
Date Issue: 2015
Appears in Collections:NEPAM - Artigos e Outros Documentos

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