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| Registros recuperados : 31 | |
| 7. |  | GARRIDO, L. da R.; LIMA, M. F. de; LOPES, P. R. C. Manejo das doenças da videira no sistema de Produção Integrada. Fitopatologia Brasileira, Brasília, DF, v. 32, p. S 71-S 72, ago. 2007. Suplemento. Edição dos resumos do XL Congresso Brasileiro de Fitopatologia, Maringá, 13 a 17 de agosto de 2007.| Biblioteca(s): Embrapa Semiárido; Embrapa Uva e Vinho. |
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| 8. | | HAMADA, E.; ANGELOTTI, F.; GARRIDO, L. da R.; GHINI, R.; CARVALHO, M. C; PALLADINO, R. P. Efeito das mudanças climáticas sobre a favorabilidade às podridões da uva madura e cinzenta da videira no nordeste brasileiro. Revista Brasileira de Geografia Física, Recife, v. 4, n. 6, p. 1213-1221, 2011.| Biblioteca(s): Embrapa Meio Ambiente; Embrapa Semiárido. |
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| 10. | | ANGELOTTI, F.; HAMADA, E.; PEIXOTO, A. R.; GARRIDO, L. da R. Impacto potencial das mudanças climáticas sobre a distribuição geográfica do cancro-bacteriano da videira no Brasil. In: BETTIOL, W.; HAMADA, E.; ANGELOTTI, F.; AUAD, A. M.; GHINI, R. (Ed.). Aquecimento global e problemas fitossanitários. Brasília, DF: Embrapa, 2017. cap. 12, p. 243-261.| Biblioteca(s): Embrapa Meio Ambiente; Embrapa Semiárido. |
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| 11. | | PEREIRA, G. E.; HOFFMANN, A.; GARRIDO, L. da R.; SILVEIRA, S. V. da (ed.). Cuidados com a matéria-prima, processos de elaboração, controle da contaminação e de perigos em vinhos e sucos. Brasília, DF: SEBRAE; Bento Gonçalves: Embrapa Uva e Vinho: IBRAVIN, 2011. 130 p. (Boas Práticas Agrícolas - BPA; Uva para processamento, 7). Programa de Desenvolvimento da Cadeia Produtiva de Vinhos, Espumantes e Suco de Uva - PAS.| Biblioteca(s): Embrapa Semiárido; Embrapa Uva e Vinho. |
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| 17. | | MAIA, J. D. G.; RITSCHEL, P. S.; SOUZA, R. T. de; GARRIDO, L. da R. "BRS Vitória" - Uva para mesa, sem sementes, de sabor especial e tolerante ao míldio: recomendações agronômicas para a região de Campinas, São Paulo. Bento Gonçalves, RS: Embrapa uva e vinho, 2016. 28 p. (Embrapa Uva e Vinho. Cirular Técnica, 129)| Biblioteca(s): Embrapa Clima Temperado; Embrapa Semiárido; Embrapa Unidades Centrais; Embrapa Uva e Vinho. |
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| 18. | | ANGELOTTI, F.; HAMADA, E.; MAGALHÃES, E. E.; GHINI, R.; GARRIDO, L. da R.; PEDRO JUNIOR, M. J. Climate change and the occurrence of downy mildew in Brazilian grapevines. Pesquisa Agropecuária Brasileira, Brasília,DF, v. 52, n. 6, p. 426-434, jun. 2017.| Biblioteca(s): Embrapa Semiárido; Embrapa Unidades Centrais. |
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| 20. | | CHAVARRIA, G.; SANTOS, H. P. dos; FIN, E.; SÔNEGO, O. R.; GARRIDO, L. da R.; MARODIN, G. A. B. Dispersão anemófila de esporangiósporos de Plasmopara viticola em cultivos protegido e convencional de videira. Revista Brasileira de Fruticultura, Jaboticabal, v.31, n.3, p. 710-717, set. 2009.| Biblioteca(s): Embrapa Mandioca e Fruticultura; Embrapa Semiárido. |
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| Registros recuperados : 31 | |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Meio Ambiente. |
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Data corrente: |
03/12/2013 |
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Data da última atualização: |
07/03/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
RESTREPO-COUPE, N.; ROCHA, H. R. da; HUTYRA, L. R.; ARAUJO, A. C. da; BORMA, L. S.; CHRISTOFFERSEN, B.; CABRAL, O. M. R.; CAMARGO, P. B. de; CARDOSO, F. L.; COSTA, A. C. L. da; FITZJARRALD, D. R.; GOULDEN, M. L.; KRUIJT, B.; MAIA, J. M. F.; MALHI, Y. S.; MANZI, A. O.; MILLER, S. D.; NOBRE, A. D.; RANDOW, C. von; SÁ, L. D. ABREU; SAKAI, R. K.; TOTA, J.; WOFSY, S. C.; ZANCHI, F. B.; SALESKA, S. R. |
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Afiliação: |
NATALIA RESTREPO-COUPE, University of Arizona / University of Technology Sydney; HUMBERTO R. DA ROCHA, USP; LUCY R. HUTYRA, BOSTON UNIVERSITY; ALESSANDRO CARIOCA DE ARAUJO, CPATU / INPA; LAURA S. BORMA, USP; BRADLEY CHRISTOFFERSEN, UNIVERSITY OF ARIZONA; OSVALDO MACHADO RODRIGUES CABRAL, CNPMA; PLINIO B. DE CAMARGO, University of Technology Sydney; FERNANDO L. CARDOSO, UFTO; ANTONIO C. LOLA DA COSTA, UFPA; DAVID R. FITZJARRALD, State University of New York; MICHAEL L. GOULDEN, University of California Irvine; BART KRUIJT, Wageningen University and Research Centre; JAIR M. F. MAIA, INPA / UEAM; YADVINDER S. MALHI, Oxford University Centre for the Environment; ANTONIO O. MANZI, INPA; SCOTT D. MILLER, State University of New York; ANTONIO D. NOBRE, INPA; CELSO VON RANDOW, Wageningen University and Research Centre / Brazilian National Institute for Space Research; LEONARDO D. ABREU SÁ, INPE; RICARDO K. SAKAI, State University of New York; JULIA TOTA, INPA; STEVEN C. WOFSY, HARVARD UNIVERSITY; FABRICIO B. ZANCHI, Vrije Universiteit Amsterdam / UFAM; SCOTT R. SALESKA, UNIVERSITY OF ARIZONA. |
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Título: |
What drives the seasonality of photosynthesis across the Amazon basin: a cross-site analysis of eddy flux tower measurements from the Brasil flux network. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 182-183, p. 128-144, Dec. 2013. |
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DOI: |
http://dx.doi.org/10.1016/j.agrformet.2013.04.031 |
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Idioma: |
Inglês |
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Conteúdo: |
We investigated the seasonal patterns of Amazonian forest photosynthetic activity, and the effects thereon of variations in climate and land-use, by integrating data from a network of ground-based eddy flux towers in Brazil established as part of the ?Large-Scale Biosphere Atmosphere Experiment in Amazonia? project. We found that degree of water limitation, as indicated by the seasonality of the ratio of sensible to latent heat flux (Bowen ratio) predicts seasonal patterns of photosynthesis. In equatorial Amazonian forests (5° N?5° S), water limitation is absent, and photosynthetic fluxes (or gross ecosystem productivity, GEP) exhibit high or increasing levels of photosynthetic activity as the dry season progresses, likely a consequence of allocation to growth of new leaves. In contrast, forests along the southern flank of the Amazon, pastures converted from forest, and mixed forest-grass savanna, exhibit dry-season declines in GEP, consistent with increasing degrees of water limitation. Although previous work showed tropical ecosystem evapotranspiration (ET) is driven by incoming radiation, GEP observations reported here surprisingly show no or negative relationships with photosynthetically active radiation (PAR). Instead, GEP fluxes largely followed the phenology of canopy photosynthetic capacity (Pc), with only deviations from this primary pattern driven by variations in PAR. Estimates of leaf flush at three non-water limited equatorial forest sites peak in the dry season, in correlation with high dry season light levels. The higher photosynthetic capacity that follows persists into the wet season, driving high GEP that is out of phase with sunlight, explaining the negative observed relationship with sunlight. Overall, these patterns suggest that at sites where water is not limiting, light interacts with adaptive mechanisms to determine photosynthetic capacity indirectly through leaf flush and litterfall seasonality. These mechanisms are poorly represented in ecosystem models, and represent an important challenge to efforts to predict tropical forest responses to climatic variations. MenosWe investigated the seasonal patterns of Amazonian forest photosynthetic activity, and the effects thereon of variations in climate and land-use, by integrating data from a network of ground-based eddy flux towers in Brazil established as part of the ?Large-Scale Biosphere Atmosphere Experiment in Amazonia? project. We found that degree of water limitation, as indicated by the seasonality of the ratio of sensible to latent heat flux (Bowen ratio) predicts seasonal patterns of photosynthesis. In equatorial Amazonian forests (5° N?5° S), water limitation is absent, and photosynthetic fluxes (or gross ecosystem productivity, GEP) exhibit high or increasing levels of photosynthetic activity as the dry season progresses, likely a consequence of allocation to growth of new leaves. In contrast, forests along the southern flank of the Amazon, pastures converted from forest, and mixed forest-grass savanna, exhibit dry-season declines in GEP, consistent with increasing degrees of water limitation. Although previous work showed tropical ecosystem evapotranspiration (ET) is driven by incoming radiation, GEP observations reported here surprisingly show no or negative relationships with photosynthetically active radiation (PAR). Instead, GEP fluxes largely followed the phenology of canopy photosynthetic capacity (Pc), with only deviations from this primary pattern driven by variations in PAR. Estimates of leaf flush at three non-water limited equatorial forest sites peak in the dry season... Mostrar Tudo |
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Palavras-Chave: |
Sazonalidade. |
|
Thesagro: |
Floresta Tropical. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
--
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03502naa a2200457 a 4500
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024 7 $ahttp://dx.doi.org/10.1016/j.agrformet.2013.04.031$2DOI
100 1 $aRESTREPO-COUPE, N.
245 $aWhat drives the seasonality of photosynthesis across the Amazon basin$ba cross-site analysis of eddy flux tower measurements from the Brasil flux network.$h[electronic resource]
260 $c2013
520 $aWe investigated the seasonal patterns of Amazonian forest photosynthetic activity, and the effects thereon of variations in climate and land-use, by integrating data from a network of ground-based eddy flux towers in Brazil established as part of the ?Large-Scale Biosphere Atmosphere Experiment in Amazonia? project. We found that degree of water limitation, as indicated by the seasonality of the ratio of sensible to latent heat flux (Bowen ratio) predicts seasonal patterns of photosynthesis. In equatorial Amazonian forests (5° N?5° S), water limitation is absent, and photosynthetic fluxes (or gross ecosystem productivity, GEP) exhibit high or increasing levels of photosynthetic activity as the dry season progresses, likely a consequence of allocation to growth of new leaves. In contrast, forests along the southern flank of the Amazon, pastures converted from forest, and mixed forest-grass savanna, exhibit dry-season declines in GEP, consistent with increasing degrees of water limitation. Although previous work showed tropical ecosystem evapotranspiration (ET) is driven by incoming radiation, GEP observations reported here surprisingly show no or negative relationships with photosynthetically active radiation (PAR). Instead, GEP fluxes largely followed the phenology of canopy photosynthetic capacity (Pc), with only deviations from this primary pattern driven by variations in PAR. Estimates of leaf flush at three non-water limited equatorial forest sites peak in the dry season, in correlation with high dry season light levels. The higher photosynthetic capacity that follows persists into the wet season, driving high GEP that is out of phase with sunlight, explaining the negative observed relationship with sunlight. Overall, these patterns suggest that at sites where water is not limiting, light interacts with adaptive mechanisms to determine photosynthetic capacity indirectly through leaf flush and litterfall seasonality. These mechanisms are poorly represented in ecosystem models, and represent an important challenge to efforts to predict tropical forest responses to climatic variations.
650 $aAmazonia
650 $aFloresta Tropical
653 $aSazonalidade
700 1 $aROCHA, H. R. da
700 1 $aHUTYRA, L. R.
700 1 $aARAUJO, A. C. da
700 1 $aBORMA, L. S.
700 1 $aCHRISTOFFERSEN, B.
700 1 $aCABRAL, O. M. R.
700 1 $aCAMARGO, P. B. de
700 1 $aCARDOSO, F. L.
700 1 $aCOSTA, A. C. L. da
700 1 $aFITZJARRALD, D. R.
700 1 $aGOULDEN, M. L.
700 1 $aKRUIJT, B.
700 1 $aMAIA, J. M. F.
700 1 $aMALHI, Y. S.
700 1 $aMANZI, A. O.
700 1 $aMILLER, S. D.
700 1 $aNOBRE, A. D.
700 1 $aRANDOW, C. von
700 1 $aSÁ, L. D. ABREU
700 1 $aSAKAI, R. K.
700 1 $aTOTA, J.
700 1 $aWOFSY, S. C.
700 1 $aZANCHI, F. B.
700 1 $aSALESKA, S. R.
773 $tAgricultural and Forest Meteorology$gv. 182-183, p. 128-144, Dec. 2013.
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