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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
02/12/2015 |
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Data da última atualização: |
27/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ROWLAND, L.; COSTA, A. C. L. da; GALBRAITH, D. R.; OLIVEIRA, R. S.; BINKS, O. J.; OLIVEIRA, A. A. R.; PULLEN, A. M.; DOUGHTY, C. E.; METCALFE, D. B.; VASCONCELOS, S. S.; FERREIRA, L. V.; MALHI, Y.; GRACE, J.; MENCUCCINI, M.; MEIR, P. |
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Afiliação: |
L. Rowland, University of Edinburgh; A. C. L. da Costa, UFPA; D. R. Galbraith, University of Leeds; R. S. Oliveira, UNICAMP; O. J. Binks, University of Edinburgh; A. A. R. Oliveira, UFPA; A. M. Pullen, University of Cambridge; C. E. Doughty, University of Oxford; D. B. Metcalfe, Lund University; STEEL SILVA VASCONCELOS, CPATU; L. V. Ferreira, MPEG; Y. Malhi, University of Oxford; J. Grace, University of Edinburgh; M. Mencuccini, University of Edinburgh / ICREA at CREAF; P. Meir, University of Edinburgh / Australian National University. |
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Título: |
Death from drought in tropical forests is triggered by hydraulics not carbon starvation. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Nature, v. 528, N. 7580, p. 119-122, 3 Dec. 2015. |
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DOI: |
10.1038/nature15539 |
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Idioma: |
Inglês |
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Conteúdo: |
Drought threatens tropical rainforests over seasonal to decadal timescales1, 2, 3, 4, but the drivers of tree mortality following drought remain poorly understood5, 6. It has been suggested that reduced availability of non-structural carbohydrates (NSC) critically increases mortality risk through insufficient carbon supply to metabolism (?carbon starvation?)7, 8. However, little is known about how NSC stores are affected by drought, especially over the long term, and whether they are more important than hydraulic processes in determining drought-induced mortality. Using data from the world?s longest-running experimental drought study in tropical rainforest (in the Brazilian Amazon), we test whether carbon starvation or deterioration of the water-conducting pathways from soil to leaf trigger tree mortality. Biomass loss from mortality in the experimentally droughted forest increased substantially after >10 years of reduced soil moisture availability. The mortality signal was dominated by the death of large trees, which were at a much greater risk of hydraulic deterioration than smaller trees. However, we find no evidence that the droughted trees suffered carbon starvation, as their NSC concentrations were similar to those of non-droughted trees, and growth rates did not decline in either living or dying trees. Our results indicate that hydraulics, rather than carbon starvation, triggers tree death from drought in tropical rainforest. |
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Palavras-Chave: |
Ecossistema ecológico; Morte. |
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Thesagro: |
Árvore; Floresta Tropical; Mudança Climática; Seca. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02489naa a2200373 a 4500
001 2030428
005 2022-05-27
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1038/nature15539$2DOI
100 1 $aROWLAND, L.
245 $aDeath from drought in tropical forests is triggered by hydraulics not carbon starvation.$h[electronic resource]
260 $c2015
520 $aDrought threatens tropical rainforests over seasonal to decadal timescales1, 2, 3, 4, but the drivers of tree mortality following drought remain poorly understood5, 6. It has been suggested that reduced availability of non-structural carbohydrates (NSC) critically increases mortality risk through insufficient carbon supply to metabolism (?carbon starvation?)7, 8. However, little is known about how NSC stores are affected by drought, especially over the long term, and whether they are more important than hydraulic processes in determining drought-induced mortality. Using data from the world?s longest-running experimental drought study in tropical rainforest (in the Brazilian Amazon), we test whether carbon starvation or deterioration of the water-conducting pathways from soil to leaf trigger tree mortality. Biomass loss from mortality in the experimentally droughted forest increased substantially after >10 years of reduced soil moisture availability. The mortality signal was dominated by the death of large trees, which were at a much greater risk of hydraulic deterioration than smaller trees. However, we find no evidence that the droughted trees suffered carbon starvation, as their NSC concentrations were similar to those of non-droughted trees, and growth rates did not decline in either living or dying trees. Our results indicate that hydraulics, rather than carbon starvation, triggers tree death from drought in tropical rainforest.
650 $aÁrvore
650 $aFloresta Tropical
650 $aMudança Climática
650 $aSeca
653 $aEcossistema ecológico
653 $aMorte
700 1 $aCOSTA, A. C. L. da
700 1 $aGALBRAITH, D. R.
700 1 $aOLIVEIRA, R. S.
700 1 $aBINKS, O. J.
700 1 $aOLIVEIRA, A. A. R.
700 1 $aPULLEN, A. M.
700 1 $aDOUGHTY, C. E.
700 1 $aMETCALFE, D. B.
700 1 $aVASCONCELOS, S. S.
700 1 $aFERREIRA, L. V.
700 1 $aMALHI, Y.
700 1 $aGRACE, J.
700 1 $aMENCUCCINI, M.
700 1 $aMEIR, P.
773 $tNature$gv. 528, N. 7580, p. 119-122, 3 Dec. 2015.
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| 1. |  | PALMA PACHECO, O. I.; CATTO, J. B.; MASTROCOLA, M. A.; VIEIRA, L. M.; GARAGORRY, F. M. Modelo de simulação para o Pantanal Mato-Grossense. In: SEMINÁRIO SOBRE A APLICAÇÃO DE UM ENFOQUE DE SISTEMAS NA PESQUISA DE PRODUÇÃO ANIMAL, 1., 1978, Campo Grande. A avaliação econômica de sistemas de produção animal e alocação de recursos de pesquisa: anais. Brasília, DF: EMBRAPA-DID, 1982. p. 72-80.| Biblioteca(s): Embrapa Pantanal. |
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| 4. | | ARAUJO, M. M. A.; SAKODA JUNIOR, M.; PALMA PACHECO, O. I.; FALVO, S. R.; BONFIM, W. S.; GATTAZ SOBRINHO, F. Linha de desenvolvimento de produtos novos. In: SIMPOSIO BRASILEIRO DE ENGENHARIA DE SOFTWARE, 8.; WORKSHOP DE QUALIDADE DE SOFTWARE, 1994, Curitiba. Workshop de qualidade de software. Curitiba: Centro Internacional de Tecnologia de Software, 1994. p. 66-69.| Biblioteca(s): Embrapa Agricultura Digital. |
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| 5. | | KAMADA, A.; CUNHA, C. A. Q.; RODRIGUES, J. G. L.; LUZ, M. de C. P. da; OKUDA, M.; ARGOLLO JUNIOR, M. de T. e; PALMA PACHECO, O. I.; MONTE, R.; GALHEIRO, W. J. S. ADABag: Baguete Application Development Environment. In: INTERNATIONAL WORKSHOP ON THE BRAZILIAN SOFTWARE PLANT PROJECT, 2., 1990, Campinas. Proceedings... Campinas: Banco do Brasil: EMBRAPA-NTIA: CTI, 1990. p. 73-85.| Biblioteca(s): Embrapa Agricultura Digital. |
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