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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
15/05/2018 |
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Data da última atualização: |
22/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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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. |
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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. |
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Título: |
Drought stress and tree size determine stem CO2 efflux in a tropical forest. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
New Phytologist, v. 218, n. 4, p. 1393-1405, June 2018. |
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DOI: |
10.1111/nph.15024 |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
Estresse hídrico. |
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Thesagro: |
Carbono; Floresta; Floresta Tropical. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| 3. |  | NASCENTE, A. S.; HEINEMANN, A. B.; ALVES, L. C.; ROSA, P. H.; NAVES, L. F. V.; GARCIA, A. C. F. Development of super early genotypes for the dry bean (Phaseolus vulgaris) as affected by nitrogen management. Australian Journal of Crop Science, v. 10, n. 8, p. 1118-1126, 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 8. | | NASCENTE, A. S.; CARVALHO, M. da C. S.; ROSA, P. H. Nitrogênio mineral do solo e desenvolvimento do feijão-comum de ciclo super-precoce em função do manejo de nitrogênio. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 32.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 16.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 14.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 11., 2016, Goiânia. Rumo aos novos desafios: [anais]. Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2016. Fertbio 2016.| Tipo: Resumo em Anais de Congresso |
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