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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
09/03/2006 |
Data da última atualização: |
20/06/2008 |
Autoria: |
TORAL, F. L. B.; SILVA, L. O. C. da; MARTINS, E. N.; GONDO, A.; SIMONELLI, S. M. |
Título: |
Interação genótipo x ambiente em características de crescimento de bovinos da raça Nelore no Mato Grosso do Sul. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 41., 2004, Campo Grande, MS. A produção animal e a segurança alimentar: anais dos simpósios e dos resumos. Campo Grande, MS: Sociedade Brasileira de Zootecnia: Embrapa Gado de Corte, 2004. |
Páginas: |
5 p. MELH 060. |
Descrição Física: |
1 CD-ROM. |
Idioma: |
Português |
Notas: |
CNPGC. |
Palavras-Chave: |
Avaliação; Bovino de corte; Evaluation; Genotype environmental interaction; Growing; Herdabilidade; Interação genótipo ambiente; Nelore. |
Thesagro: |
Crescimento; Melhoramento Genético Animal. |
Thesaurus Nal: |
animal breeding; beef cattle; heritability; Nellore. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01214naa a2200349 a 4500 001 1325991 005 2008-06-20 008 2004 bl uuuu u00u1 u #d 100 1 $aTORAL, F. L. B. 245 $aInteração genótipo x ambiente em características de crescimento de bovinos da raça Nelore no Mato Grosso do Sul. 260 $c2004 300 $a5 p. MELH 060.$c1 CD-ROM. 500 $aCNPGC. 650 $aanimal breeding 650 $abeef cattle 650 $aheritability 650 $aNellore 650 $aCrescimento 650 $aMelhoramento Genético Animal 653 $aAvaliação 653 $aBovino de corte 653 $aEvaluation 653 $aGenotype environmental interaction 653 $aGrowing 653 $aHerdabilidade 653 $aInteração genótipo ambiente 653 $aNelore 700 1 $aSILVA, L. O. C. da 700 1 $aMARTINS, E. N. 700 1 $aGONDO, A. 700 1 $aSIMONELLI, S. M. 773 $tIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 41., 2004, Campo Grande, MS. A produção animal e a segurança alimentar: anais dos simpósios e dos resumos. Campo Grande, MS: Sociedade Brasileira de Zootecnia: Embrapa Gado de Corte, 2004.
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Embrapa Gado de Corte (CNPGC) |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Meio Ambiente. |
Data corrente: |
03/12/2013 |
Data da última atualização: |
07/03/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
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. |
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. |
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. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 182-183, p. 128-144, Dec. 2013. |
DOI: |
http://dx.doi.org/10.1016/j.agrformet.2013.04.031 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Sazonalidade. |
Thesagro: |
Floresta Tropical. |
Thesaurus NAL: |
Amazonia. |
Categoria do assunto: |
-- K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 03502naa a2200457 a 4500 001 1981459 005 2014-03-07 008 2013 bl uuuu u00u1 u #d 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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