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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
15/05/2018 |
Data da última atualização: |
22/05/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ROWLAND, L.; COSTA, A. C. L. da; OLIVEIRA, A. A. R.; OLIVEIRA, R. S.; BITTENCOURT, P. L.; COSTA, P. B.; GILES, A. L.; SOSA, A. I.; COUGHLIN, I.; GODLEE, J. L.; VASCONCELOS, S. S.; S. JUNIOR, J. A.; FERREIRA, L. V.; MENCUCCINI, M.; MEIR, P. |
Afiliação: |
Lucy Rowland, University of Exeter; Antonio C. L. da Costa, UFPA; Alex A. R. Oliveira, MPEG; Rafael S. Oliveira, UNICAMP; Paulo L. Bittencourt, UNICAMP; Patricia B. Costa, UNICAMP; Andre L. Giles, UNICAMP; Azul I. Sosa, UNICAMP; Ingrid Coughlin, USP; John L. Godlee, University of Edinburgh; STEEL SILVA VASCONCELOS, CPATU; João A. S. Junior, UFPA; Leandro V. Ferreira, MPEG; Maurizio Mencuccini, CREAF / ICREA; Patrick Meir, University of Edinburgh / Australian National University. |
Título: |
Drought stress and tree size determine stem CO2 efflux in a tropical forest. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
New Phytologist, v. 218, n. 4, p. 1393-1405, June 2018. |
DOI: |
10.1111/nph.15024 |
Idioma: |
Inglês |
Conteúdo: |
CO2 efflux from stems (CO2_stem) accounts for a substantial fraction of tropical forest gross primary productivity, but the climate sensitivity of this flux remains poorly understood. We present a study of tropical forest CO2_stem from 215 trees across wet and dry seasons, at the world?s longest running tropical forest drought experiment site. We show a 27% increase in wet season CO2_stem in the droughted forest relative to a control forest. This was driven by increasing CO2_stem in trees 10?40 cm diameter. Furthermore, we show that drought increases the proportion of maintenance to growth respiration in trees > 20 cm diameter, including large increases in maintenance respiration in the largest droughted trees, > 40 cm diameter. However, we found no clear taxonomic influence on CO2_stem and were unable to accurately predict how drought sensitivity altered ecosystem scale CO2_stem, due to substantial uncertainty introduced by contrasting methods previously employed to scale CO2_stem fluxes. Our findings indicate that under future scenarios of elevated drought, increases in CO2_stem may augment carbon losses, weakening or potentially reversing the tropical forest carbon sink. However, due to substantial uncertainties in scaling CO2_stem fluxes, stand-scale future estimates of changes in stem CO2 emissions remain highly uncertain. |
Palavras-Chave: |
Estresse hídrico. |
Thesagro: |
Carbono; Floresta; Floresta Tropical. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/176915/1/nph.15024.pdf
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Marc: |
LEADER 02323naa a2200349 a 4500 001 2091469 005 2018-05-22 008 2018 bl uuuu u00u1 u #d 024 7 $a10.1111/nph.15024$2DOI 100 1 $aROWLAND, L. 245 $aDrought stress and tree size determine stem CO2 efflux in a tropical forest.$h[electronic resource] 260 $c2018 520 $aCO2 efflux from stems (CO2_stem) accounts for a substantial fraction of tropical forest gross primary productivity, but the climate sensitivity of this flux remains poorly understood. We present a study of tropical forest CO2_stem from 215 trees across wet and dry seasons, at the world?s longest running tropical forest drought experiment site. We show a 27% increase in wet season CO2_stem in the droughted forest relative to a control forest. This was driven by increasing CO2_stem in trees 10?40 cm diameter. Furthermore, we show that drought increases the proportion of maintenance to growth respiration in trees > 20 cm diameter, including large increases in maintenance respiration in the largest droughted trees, > 40 cm diameter. However, we found no clear taxonomic influence on CO2_stem and were unable to accurately predict how drought sensitivity altered ecosystem scale CO2_stem, due to substantial uncertainty introduced by contrasting methods previously employed to scale CO2_stem fluxes. Our findings indicate that under future scenarios of elevated drought, increases in CO2_stem may augment carbon losses, weakening or potentially reversing the tropical forest carbon sink. However, due to substantial uncertainties in scaling CO2_stem fluxes, stand-scale future estimates of changes in stem CO2 emissions remain highly uncertain. 650 $aCarbono 650 $aFloresta 650 $aFloresta Tropical 653 $aEstresse hídrico 700 1 $aCOSTA, A. C. L. da 700 1 $aOLIVEIRA, A. A. R. 700 1 $aOLIVEIRA, R. S. 700 1 $aBITTENCOURT, P. L. 700 1 $aCOSTA, P. B. 700 1 $aGILES, A. L. 700 1 $aSOSA, A. I. 700 1 $aCOUGHLIN, I. 700 1 $aGODLEE, J. L. 700 1 $aVASCONCELOS, S. S. 700 1 $aS. JUNIOR, J. A. 700 1 $aFERREIRA, L. V. 700 1 $aMENCUCCINI, M. 700 1 $aMEIR, P. 773 $tNew Phytologist$gv. 218, n. 4, p. 1393-1405, June 2018.
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Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
Biblioteca(s): |
Embrapa Territorial. |
Data corrente: |
22/06/2004 |
Data da última atualização: |
17/09/2014 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
MIRANDA, E. E. de; TAKEDA, A. M.; MIRANDA, J. R. |
Afiliação: |
Embrapa-NMA. |
Título: |
Suivi par satélite NOAA de la variabilité spatiale et temporelle des feux de brousse au Brésil. |
Ano de publicação: |
1994 |
Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON RESOURCE AND ENVIRONMENTAL MONITORING (ISPRS) ou ECORIO, 7., 1994, Rio de Janeiro. Proceedings: Working Group 3... São José dos Campos: INPE, 1994. |
Páginas: |
p. 317-323 |
Descrição Física: |
folhas avulsas, il. |
Idioma: |
Francês |
Conteúdo: |
Divulga os resultados do monitoramento por satélite das queimadas no Brasil. |
Palavras-Chave: |
Brasil; Monitoramento; Queimadas. |
Thesagro: |
Cartografia; Satélite. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/108602/1/1484.pdf
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Marc: |
LEADER 00803nam a2200205 a 4500 001 1017258 005 2014-09-17 008 1994 bl uuuu u00u1 u #d 100 1 $aMIRANDA, E. E. de 245 $aSuivi par satélite NOAA de la variabilité spatiale et temporelle des feux de brousse au Brésil. 260 $aIn: INTERNATIONAL SYMPOSIUM ON RESOURCE AND ENVIRONMENTAL MONITORING (ISPRS) ou ECORIO, 7., 1994, Rio de Janeiro. Proceedings: Working Group 3... São José dos Campos: INPE$c1994 300 $ap. 317-323$cfolhas avulsas, il. 520 $aDivulga os resultados do monitoramento por satélite das queimadas no Brasil. 650 $aCartografia 650 $aSatélite 653 $aBrasil 653 $aMonitoramento 653 $aQueimadas 700 1 $aTAKEDA, A. M. 700 1 $aMIRANDA, J. R.
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