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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: |
06/02/2018 |
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Data da última atualização: |
02/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
WU, J.; KOBAYASHI, H.; STARK, S. C.; MENG, R.; GUAN, K.; TRAN, N. N.; GAO, S.; YANG, W.; RESTREPO-COUPE, N.; MIURA, T.; OLIVEIRA JUNIOR, R. C. de; ROGERS, A.; DYE, D. G.; NELSON, B. W.; SERBIN, S. P.; HUETE, A. R.; SALESKA, S. R. |
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Afiliação: |
Jin Wu, University of Arizona / Brookhaven National Laboratory; Hideki Kobayashi, Japan Agency for Marine-Earth Science and Technology; Scott C. Stark, Michigan State University; Ran Meng, Brookhaven National Laboratory; Kaiyu Guan, University of Illinois at Urbana Champaign; Ngoc Nguyen Tran, University of Technology Sydney; Sicong Gao, University of Technology Sydney; Wei Yang, Chiba University; Natalia Restrepo-Coupe, University of Arizona; Tomoaki Miura, University of Havaii; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; Alistair Rogers, Brookhaven National Laboratory; Dennis G. Dye, Northern Arizona University; Bruce W. Nelson, INPA; Shawn P. Serbin, Brookhaven National Laboratory; Alfredo R. Huete, University of Technology Sydney; Scott R. Saleska, University of Arizona. |
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Título: |
Biological processes dominate seasonality of remotely sensed canopy greenness in an Amazon evergreen forest. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
New Phytologist, v. 217, n. 4, p. 1507-1520, Mar. 2018. |
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DOI: |
10.1111/nph.14939 |
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Idioma: |
Inglês |
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Conteúdo: |
Satellite observations of Amazon forests show seasonal and interannual variations, but the underlying biological processes remain debated. Here we combined radiative transfer models (RTMs) with field observations of Amazon forest leaf and canopy characteristics to test three hypotheses for satellite-observed canopy reflectance seasonality: seasonal changes in leaf area index, in canopy-surface leafless crown fraction and/or in leaf demography. Canopy RTMs (PROSAIL and FLiES), driven by these three factors combined, simulated satellite-observed seasonal patterns well, explaining c. 70% of the variability in a key reflectance-based vegetation index (MAIAC EVI, which removes artifacts that would otherwise arise from clouds/aerosols and sun?sensor geometry). Leaf area index, leafless crown fraction and leaf demography independently accounted for 1, 33 and 66% of FLiES-simulated EVI seasonality, respectively. These factors also strongly influenced modeled near-infrared (NIR) reflectance, explaining why both modeled and observed EVI, which is especially sensitive to NIR, captures canopy seasonal dynamics well. Our improved analysis of canopy-scale biophysics rules out satellite artifacts as significant causes of satellite-observed seasonal patterns at this site, implying that aggregated phenology explains the larger scale remotely observed patterns. This work significantly reconciles current controversies about satellite-detected Amazon phenology, and improves our use of satellite observations to study climate?phenology relationships in the tropics. MenosSatellite observations of Amazon forests show seasonal and interannual variations, but the underlying biological processes remain debated. Here we combined radiative transfer models (RTMs) with field observations of Amazon forest leaf and canopy characteristics to test three hypotheses for satellite-observed canopy reflectance seasonality: seasonal changes in leaf area index, in canopy-surface leafless crown fraction and/or in leaf demography. Canopy RTMs (PROSAIL and FLiES), driven by these three factors combined, simulated satellite-observed seasonal patterns well, explaining c. 70% of the variability in a key reflectance-based vegetation index (MAIAC EVI, which removes artifacts that would otherwise arise from clouds/aerosols and sun?sensor geometry). Leaf area index, leafless crown fraction and leaf demography independently accounted for 1, 33 and 66% of FLiES-simulated EVI seasonality, respectively. These factors also strongly influenced modeled near-infrared (NIR) reflectance, explaining why both modeled and observed EVI, which is especially sensitive to NIR, captures canopy seasonal dynamics well. Our improved analysis of canopy-scale biophysics rules out satellite artifacts as significant causes of satellite-observed seasonal patterns at this site, implying that aggregated phenology explains the larger scale remotely observed patterns. This work significantly reconciles current controversies about satellite-detected Amazon phenology, and improves our use of satellite... Mostrar Tudo |
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Palavras-Chave: |
Sazonalidade. |
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Thesagro: |
Fenologia; Floresta tropical. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02563naa a2200361 a 4500
001 2087194
005 2018-05-02
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1111/nph.14939$2DOI
100 1 $aWU, J.
245 $aBiological processes dominate seasonality of remotely sensed canopy greenness in an Amazon evergreen forest.$h[electronic resource]
260 $c2018
520 $aSatellite observations of Amazon forests show seasonal and interannual variations, but the underlying biological processes remain debated. Here we combined radiative transfer models (RTMs) with field observations of Amazon forest leaf and canopy characteristics to test three hypotheses for satellite-observed canopy reflectance seasonality: seasonal changes in leaf area index, in canopy-surface leafless crown fraction and/or in leaf demography. Canopy RTMs (PROSAIL and FLiES), driven by these three factors combined, simulated satellite-observed seasonal patterns well, explaining c. 70% of the variability in a key reflectance-based vegetation index (MAIAC EVI, which removes artifacts that would otherwise arise from clouds/aerosols and sun?sensor geometry). Leaf area index, leafless crown fraction and leaf demography independently accounted for 1, 33 and 66% of FLiES-simulated EVI seasonality, respectively. These factors also strongly influenced modeled near-infrared (NIR) reflectance, explaining why both modeled and observed EVI, which is especially sensitive to NIR, captures canopy seasonal dynamics well. Our improved analysis of canopy-scale biophysics rules out satellite artifacts as significant causes of satellite-observed seasonal patterns at this site, implying that aggregated phenology explains the larger scale remotely observed patterns. This work significantly reconciles current controversies about satellite-detected Amazon phenology, and improves our use of satellite observations to study climate?phenology relationships in the tropics.
650 $aFenologia
650 $aFloresta tropical
653 $aSazonalidade
700 1 $aKOBAYASHI, H.
700 1 $aSTARK, S. C.
700 1 $aMENG, R.
700 1 $aGUAN, K.
700 1 $aTRAN, N. N.
700 1 $aGAO, S.
700 1 $aYANG, W.
700 1 $aRESTREPO-COUPE, N.
700 1 $aMIURA, T.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aROGERS, A.
700 1 $aDYE, D. G.
700 1 $aNELSON, B. W.
700 1 $aSERBIN, S. P.
700 1 $aHUETE, A. R.
700 1 $aSALESKA, S. R.
773 $tNew Phytologist$gv. 217, n. 4, p. 1507-1520, Mar. 2018.
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Embrapa Amazônia Oriental (CPATU) |
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| 3. |  | CORREA, F. S.; MAUES, M. M.; SANTOS, A. S. Análise do déficit de polinização da castanheira-do-brasil (Bertholletia excelsa BONPL., LECYTHIDACEAE) através de crescimento de tubos polínicos em pistilos submetidos a testes de polinização controlada. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012, Belém, PA. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2012. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 5. | | VERDI, M.; SEVEGNANI, L.; SANTOS, A. S. dos. Estrutura de comunidade arbóreo-arbustiva: base para estudos de longa duração - encosta sul, Parque Natural Municipal São Francisco de Assis, Blumenau, SC. In: SEMINÁRIO NACIONAL SOBRE DINÂMICAS DE FLORESTAS, 1., 2008, Curitiba. Anais. Colombo: Embrapa Florestas, 2008. 1 CD-ROM. Resumo 33.| Biblioteca(s): Embrapa Florestas. |
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| 6. | | SANTOS, A. S. dos; SEVEGNANI, L.; VERDI, M. Estrutura de comunidade arbóreo-arbustiva e levantamento florístico da sinúsia herbácea - base para estudos de longa duração - encosta norte, Parque Natural Municipal São Francisco de Assis, Blumenau, SC. In: SEMINÁRIO NACIONAL SOBRE DINÂMICAS DE FLORESTAS, 1., 2008, Curitiba. Anais. Colombo: Embrapa Florestas, 2008. 1 CD-ROM. Resumo 32.| Biblioteca(s): Embrapa Florestas. |
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| 7. | | MAUES, M. M.; CAVALCANTE, M. C.; SANTOS, A. S.; COOREA, F. S. Agrobiodiversidade de polinizadores em duas áreas cultivadas com castanheira-do-brasil (Bertholletia excelsa Bonpl.) . In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012, Belém, PA. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2012. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 8. | | SOUZA FILHO, A. P. S.; TITAN, G. N. A.; ALVES, S. de M.; SANTOS, A. S. Atividade potencialmente alelopática em extratos aquosos de sementes e parte aérea de Pueraria phaseoloides. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 37., 2000, Viçosa. Anais. Viçosa: SBZ, 2000. p. 1-3. 1 CD-ROM. Resumo também publicado em: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 37., 2000, Viçosa, MG. Resumos dos trabalhos apresentados. Viçosa, MG: Sociedade Brasileira de Zootecnia, 2000. p. 25.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 14. | | FIGUEIREDO, F. J. C.; ALVES, S. de M.; SANTOS, A. S.; ROCHA NETO, O. G. da. Otimização da extração de óleo essencial e do teor de safrol de pimenta longa (Piper hispidinervum C.DC.): 2 - Estudo de carga de biomassa no destilador. In: WORKSHOP DE ENCERRAMENTO DO PROJETO DE DESENVOLVIMENTO DE TECNOLOGIAS PARA PRODUÇÃO DE SAFROL A PARTIR DE PIMENTA LONGA (Piper hispidinervum), 1., 2001, Rio Branco, AC. Anais... Rio Branco, AC: Embrapa Acre, 2001. p. 163-167. il. (Embrapa Acre. Documentos, 75).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 15. | | FIGUEIREDO, F. J. C.; ALVES, S. de M.; ROCHA NETO, O. G. da; SANTOS, A. S. Otimização da extração de óleo essencial e do teor de safrol de pimenta longa (Piper hispidinervum C.DC.): 4 - Avaliação da quantidade do óleo no decorrer da destilação. In: WORKSHOP DE ENCERRAMENTO DO PROJETO DE DESENVOLVIMENTO DE TECNOLOGIAS PARA PRODUÇÃO DE SAFROL A PARTIR DE PIMENTA LONGA (Piper hispidinervum), 1., 2001, Rio Branco, AC. Anais... Rio Branco, AC: Embrapa Acre, 2001. p. 174-179. il. (Embrapa Acre. Documentos, 75).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 16. | | WOLKOFF, D. B.; SANTOS, A. S.; MORETTI, R. H.; DELLA MODESTA, R. C.; MATTA, V. M. Estudo da preferencia de misturas de sucos para formulacao de repositor hidroeletrolitico. In: SIMPOSIO LATINO AMERICANO DE CIENCIA DE ALIMENTOS, 4., 2001, Campinas, SP. Livro de Resumos... 2001. p.226, ref. 0747-254.1.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 19. | | SANTOS, A. S.; LEDO, C. A. da S.; FERREIRA, C. F.; ARAÚJO, J. S. Caracterização de acessos de mandioca silvestre para uso no pré-melhoramento de Manihot esculenta Crantz. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012, Belém, PA. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2012. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| Registros recuperados : 174 | |
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