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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
23/07/2018 |
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Data da última atualização: |
23/07/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALBERT, L. P.; WU, J.; PROHASKA, N.; CAMARGO, P. B. de; HUXMAN, T. E.; TRIBUZY, E. S.; IVANOV, V. Y.; OLIVEIRA, R. S.; GARCIA, S.; SMITH, M. N.; OLIVEIRA JUNIOR, R. C. de; RESTREPO-COUPE, N.; SILVA, R. da; STARK, S. C.; MARTINS, G. A.; PENHA, D. V.; SALESKA, S. R. |
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Afiliação: |
Loren P. Albert, University of Arizona / Brown University; Jin Wu, University of Arizona / Brookhaven National Laboratory; Neill Prohaska, University of Arizona; Plinio Barbosa de Camargo, CENA/USP; Travis E. Huxman, University of California; Edgard S. Tribuzy, UFOPA; Valeriy Y. Ivanov, University of Michigan; Rafael S. Oliveira, UNICAMP; Sabrina Garcia, INPA; Marielle N. Smith, University of Arizona / Michigan State University; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; Natalia Restrepo-Coupe, University of Technology Sydney; Rodrigo da Silva, UFOPA; Scott C. Stark, Michigan State University; Giordane A. Martins, INPA; Deliane V. Penha, UFOPA; Scott R. Saleska, University of Arizona. |
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Título: |
Age-dependent leaf physiology and consequences for crown-scale carbon uptake during the dry season in an Amazon evergreen forest. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
New Phytologist, v. 219, n. 3, p. 870-884, Aug. 2018. |
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DOI: |
10.1111/nph.15056 |
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Idioma: |
Inglês |
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Conteúdo: |
Satellite and tower-based metrics of forest-scale photosynthesis generally increase with dry season progression across central Amazônia, but the underlying mechanisms lack consensus. We conducted demographic surveys of leaf age composition, and measured the age dependence of leaf physiology in broadleaf canopy trees of abundant species at a central eastern Amazon site. Using a novel leaf-to-branch scaling approach, we used these data to independently test the much-debated hypothesis ? arising from satellite and towe-based observations ? that leaf phenology could explain the forest-scale pattern of dry season photosynthesis. Stomatal conductance and biochemical parameters of photosynthesis were higher for recently mature leaves than for old leaves. Most branches had multiple leaf age categories simultaneously present, and the number of recently mature leaves increased as the dry season progressed because old leaves were exchanged for new leaves. These findings provide the first direct field evidence that branch-scale photosynthetic capacity increases during the dry season, with a magnitude consistent with increases in ecosystem-scale photosynthetic capacity derived from flux towers. Interactions between leaf age-dependent physiology and shifting leaf age-demographic composition are sufficient to explain the dry season photosynthetic capacity pattern at this site, and should be considered in vegetation models of tropical evergreen forests. |
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Thesagro: |
Desmatamento; Fenologia; Floresta Tropical; Fotossíntese; Seca. |
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Thesaurus Nal: |
Amazonia; Drought; Ontogeny; Photosynthesis; Tropical forests. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02699naa a2200445 a 4500
001 2093465
005 2018-07-23
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1111/nph.15056$2DOI
100 1 $aALBERT, L. P.
245 $aAge-dependent leaf physiology and consequences for crown-scale carbon uptake during the dry season in an Amazon evergreen forest.$h[electronic resource]
260 $c2018
520 $aSatellite and tower-based metrics of forest-scale photosynthesis generally increase with dry season progression across central Amazônia, but the underlying mechanisms lack consensus. We conducted demographic surveys of leaf age composition, and measured the age dependence of leaf physiology in broadleaf canopy trees of abundant species at a central eastern Amazon site. Using a novel leaf-to-branch scaling approach, we used these data to independently test the much-debated hypothesis ? arising from satellite and towe-based observations ? that leaf phenology could explain the forest-scale pattern of dry season photosynthesis. Stomatal conductance and biochemical parameters of photosynthesis were higher for recently mature leaves than for old leaves. Most branches had multiple leaf age categories simultaneously present, and the number of recently mature leaves increased as the dry season progressed because old leaves were exchanged for new leaves. These findings provide the first direct field evidence that branch-scale photosynthetic capacity increases during the dry season, with a magnitude consistent with increases in ecosystem-scale photosynthetic capacity derived from flux towers. Interactions between leaf age-dependent physiology and shifting leaf age-demographic composition are sufficient to explain the dry season photosynthetic capacity pattern at this site, and should be considered in vegetation models of tropical evergreen forests.
650 $aAmazonia
650 $aDrought
650 $aOntogeny
650 $aPhotosynthesis
650 $aTropical forests
650 $aDesmatamento
650 $aFenologia
650 $aFloresta Tropical
650 $aFotossíntese
650 $aSeca
700 1 $aWU, J.
700 1 $aPROHASKA, N.
700 1 $aCAMARGO, P. B. de
700 1 $aHUXMAN, T. E.
700 1 $aTRIBUZY, E. S.
700 1 $aIVANOV, V. Y.
700 1 $aOLIVEIRA, R. S.
700 1 $aGARCIA, S.
700 1 $aSMITH, M. N.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aRESTREPO-COUPE, N.
700 1 $aSILVA, R. da
700 1 $aSTARK, S. C.
700 1 $aMARTINS, G. A.
700 1 $aPENHA, D. V.
700 1 $aSALESKA, S. R.
773 $tNew Phytologist$gv. 219, n. 3, p. 870-884, Aug. 2018.
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Embrapa Amazônia Oriental (CPATU) |
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| 2. |  | GUIMARÃES, T. G. Caquizeiro. In: GAMA, L. C. (Org.). Artigos publicados na mídia: coletânea 2007. [Planaltina, DF: s.n.], 2007. Publicado no TodaFruta em 06 ago. 2007.| Tipo: Artigo de Divulgação na Mídia |
| Biblioteca(s): Embrapa Cerrados. |
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| 5. | | GUIMARÃES, T. G. Cultura da tangerina. In: GAMA, L. C. (Org.). Artigos publicados na mídia: coletânea 2007. [Planaltina, DF: s.n.], 2007. Publicado no Toda Fruta em 16 ago. 2007.| Tipo: Artigo de Divulgação na Mídia |
| Biblioteca(s): Embrapa Cerrados. |
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| 6. | | GUIMARÃES, T. G. A cultura da uva. In: GAMA, L. C. (Org.). Artigos publicados na mídia: coletânea 2007. [Planaltina, DF: s.n.], 2007. Publicado no TodaFruta em 22 ago. 2007.| Tipo: Artigo de Divulgação na Mídia |
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