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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; 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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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. |
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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
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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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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| Registros recuperados : 24 | |
| 1. |  | MEDEIROS, E. S.; MATTOSO, L. H. C.; ITO, E. N.; IMAM, S. H.; ORTS, W. J. Electrospun nanocomposite fibers made from poly(vinyl alcohol) and cellulose nanofibrils. In: CONGRESSO BRASILEIRO DE POLIMEROS, 10., 2009, Foz do Iguaçu, PR. Livro de resumos... São Carlos: ABPol, 2009. p. 154-155.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 3. | | CORRADINI, E.; IMAM, S. H.; AGNELLI, J. A. M.; MATTOSO, L. H. C. Effect of coconut, sisal and jute fibers on the properties of starch/gluten/glycerol matrix. Journal of polymers and the environment, [S .l.], v. 17, n. 1, p. 1-9, 2009.| Biblioteca(s): Embrapa Instrumentação. |
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| 5. | | MEDEIROS, E. S.; MATTOSO, L. H. C.; ITO, E. N.; GREGORSKI, K. S.; ROBERTSON, G. H.; OFFEMAN, R. D.; WOOD, D. F.; ORTS, W. J.; IMAM, S. H. Electrospun Nanofibers of Poly ( Vinyl Alcohol ) Reinforced With Cellulose Nanofibrils. Journal of Biobased Materials and Bioenergy, [S. l.], v. 2, n. 3, p. 231-242, 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Instrumentação. |
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| 6. | | CAMPOS, A.; MARCONCINI, J. M.; IMAM, S. H.; KLAMCZYNSKI, A.; ORTIS, W. J.; WOOD, D. H.; WILLIAMS, T. G.; MARTINS-FRANCHETTI, S. M.; MATTOSO, L. H. C. Morphological, mechanical properties and biodegradability of biocomposite thermoplastic starch and polycaprolactone reinforced with sisal fibers. Journal of reinforced plastics and composites, Westport, v. 31, n. 8, p. 573-581, 2012.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Instrumentação. |
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| 7. | | ROSA, M. de F.; MEDEIROS, E. S.; IMAM, S. H.; NASCIMENTO, D. M.; MONTEIRO, A. K.; MALMONGE, J. A.; MATTOSO, L. H. C. Nanocelulose de fibras de coco imaturo para aplicação em nanocompósitos. In: WORKSHOP DE REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 5., 2009, São Carlos-SP. Anais... São Carlos-SP: Embrapa Instrumentação Agropecuária, 2009. p.219-221.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 8. | | ROSA, M. F.; MEDEIROS, E. S.; IMAM, S. H.; NASCIMENTO, D. M.; MONTEIRO, A. K.; MALMONGE, J. A.; MATTOSO, L. H. C. Nanocelulose de fibras de coco in natura para aplicação de nanocompósitos. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 5., 2009, São Carlos. Anais... São Carlos: Embrapa Instrumentação Agropecuária, 2009. p. 219-221. Editado por Odílio Benedito Garrido de Assis; Wilson Tadeu Lopes da Silva; Luiz Henrique Capparelli Mattoso.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Instrumentação. |
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| 9. | | ORTS, W. J.; CHIOU, B.-S.; BAKER, D. A.; SHEY, J.; IMAM, S. H.; GLENN, G. M.; MATTOSO, L. H. C. Nanocomposites from agricultural based materials. In: MACRO 2006; WORLD POLYMER CONGRESS, Rio de Janeiro, Brazil; INTERNATIONAL SYMPOSIUM ON MACROMOLECULES, 41ST., 2006, Rio de Janeiro. Proceedings... [S. l.]: ABPol, 2006. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 10. | | ROSA, M. F.; MEDEIROS, E. S.; MALMONGE, J. A.; WOOD, D. F.; MATTOSO, L. H. C.; ORTS, W. J.; IMAM, S. H. Nanocomposites based on natural rubber and cellulose nanocrystals from coconut fibers. In: INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS - ICAM, 11.; ENCONTRO SBPMat, 8., 2009, Rio de Janeiro. Abstracts... Rio de Janeiro: SBPMat, 2009. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agroindústria Tropical; Embrapa Instrumentação. |
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| 11. | | AZEREDO, H. M. C. de; IMAM, S. H.; FIGUEIREDO, M. C. B. de; NASCIMENTO, D. M. do; ROSA, M. de F. Nanocrystalline cellulose from coir fiber: preparation, properties, and applications. In: PANDEY, J. K.; TAKAGI, H.; NAKAGAITO, A. N., KIM, H.-J. (Ed.). Handbook of polymer nanocomposites: processing, performance and application. Berlin: Springer, 2015. Cap. 2, p. 15-26. (Volume C: Polymer Nanocomposites of Cellulose Nanoparticles).| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 12. | | CAMPOS, A. de; MARCONCINI, J. M.; IMAM, S. H.; KLAMCZYNSKI, A.; ORTIS, W. J.; WOOD, D. H.; WILLIAMS, T. G.; MARTINS-FRANCHETTI, S. M.; MATTOSO, L. H. C. Biodegradação e propriedades mecânicas e morfológicas do biocompósito de amido termoplástico e policaprolactona com fibras de sisal. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 7.; ESCOLA DE NANOTECNOLOGIA, 3., 2013, São Carlos, SP. Anais... São Carlos, SP: Embrapa Instrumentação, 2013. p. 294-296 Editores: Maria Alice Martins, Odílio Benedito Garrido de Assis, Caue Ribeiro, Luiz Henrique Capparelli Mattoso. CD-ROM. Editores: Maria Alice Martins, Odílio Benedito Garrido de Assis, Caue Ribeiro, Luiz Henrique Capparelli Mattoso.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 13. | | ROSA, M. F.; MEDEIROS, E. S.; MALMONGE, J. A.; WOOD, D. F.; MATTOSO, L. H. C.; ORTS, W. J.; IMAM, S. H. Cellulose nanocrystals from coconut fiber: preparation and characterization. In: INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS - ICAM, 11.; ENCONTRO SBPMat, 8., 2009, Rio de Janeiro. Abstracts... Rio de Janeiro: SBPMat, 2009. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agroindústria Tropical; Embrapa Instrumentação. |
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| 14. | | ROSA, M. F.; MEDEIROS, E. S.; MALMONGE, J. A.; SOUZA FILHO, M. M.; MATTOSO, L. H. C.; ORTS, W. J.; IMAM, S. H. Cellulose nanocrystals reinforced natural rubber. In: INTERNATIONAL CONFERENCE ON FOOD AND AGRICULTURE APPLICATIONS OF NANOTECHNOLOGIES - NanoAgri, 2010, São Pedro, SP. [Anais…] São Pedro: Aptor Software, 2010. Editors: Caue Ribeiro, Odílio Benedito Garrido de Assis, Luiz Henrique Capparelli Mattoso, Sérgio Mascarenhas.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 15. | | ROSA, M. de F.; MEDEIROS, E. S.; MALMONGE, J. A.; SOUZA FILHO, M. de S. M. de; MATTOSO, L. H. C.; ORTS, W. J.; IMAM, S. H. Cellulose nanocrystals reinforced natural rubber. In: INTERNATIONAL CONFERENCE ON FOOD AND AGRICULTURE APPLICATIONS OF NANOTECHNOLOGIES, 1., 2010, São Pedro. Resumos. São Pedro: Food and Agriculture Organization of the United Nations, 2010. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 16. | | ROSA, M. de F.; MEDEIROS, E. S.; MALMONGE, J. A.; GREGORSKI, K. S.; WOOD, D. F.; MATTOSO, L. H. C.; GLENN, G.; ORTS, W. J.; IMAM, S. H. Cellulose nanowhiskers from coconut husk fibers: Effect of preparation conditions on their thermal and morphological behavior. Carbohydrate Polymers, Leiden (Holanda), v. 81, n. 1, p. 83-92, 2010.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 18. | | ROSA, M. de F.; CHIOU, B.; MEDEIROS, E. S.; WOOD, D. F.; WILLIAMS, T. G.; MATTOSO, L. H. C.; ORTS, W. J.; IMAM, S. H. Effect of fiber treatments on tensile and thermal properties of starch/ethylene vinyl alcohol copolymers/coir biocomposites. Bioresource Technology, v. 100, n. 21, p. 5196-5202, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 19. | | ROSA, M. F.; CHIOU, B.-S.; MEDEIROS, E. S.; WOOD, D. F.; WILLIAMS, T. G.; MATTOSO, L. H. C.; ORTS, W. J.; IMAM, S. H. Effect of fiber treatments on tensile and thermal properties of starch/ethylene vinyl alcohol copopolymers/coir biocomposites. Bioresource technology, Essex, v. 100, p. 5196-5202, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Instrumentação. |
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| 20. | | ROSA, M. F.; MEDEIROS, E. S.; MALMONGE, J. A.; WOOD, D. F.; MATTOSO, L. H. C.; ORTS, W. J.; IMAM, S. H. Extração e caracterização de 'whiskers' de celulose de fibra de coco. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS - CBECiMat, 18., 2008, Porto de Galinhas, BA. Anais... [S. l.: s. n.], 2008. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 24 | |
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