| |
|
|
| Registros recuperados : 26 | |
| 7. |  | LONGO, M. L.; AZEVEDO JUNIOR, N. P. de; BURIN, P. C.; VARGAS JUNIOR, F. M. de; MONTAGNER, D. B. Alelopátia de cultivares de Brachiaria brizantha sobre Estilozantes Campo Grande. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 48., 2011, Belém, PA. O desenvolvimento da produção animal e a responsabilidade frente a novos desafios: anais. Belém, PA: SBZ, 2011. 1 CD-ROM. SBZ 2011. 1-3 1 CD-ROM SBZ 2011| Biblioteca(s): Embrapa Gado de Corte. |
|   |
| 8. | | MORTON, D. C.; RUBIO, J.; COOK, B. D.; GASTELLU-ETCHEGORRY, J-P; LONGO, M.; CHOI, H.; HUNTER, M.; KELLER, M. Amazon forest structure generates diurnal and seasonal variability in light utilization. Biogeosciences, v. 13, p. 2195?2206, 2016.| Biblioteca(s): Embrapa Territorial. |
|  |
| 9. | | SANTOS, M. N. dos; PINAGÉ, E. R.; LONGO, M.; ARAUJO, L. S. de; ADAMI, M.; MORTON, D.; KELLER, M. Lidar-based assessment of forest edge effects across a degraded landscape in the Brazilian Amazon. In: CONFERENCE ON LIDAR APPLICATIONS FOR ASSESSING AND MANAGING FOREST ECOSYSTEMS, 14., 2015. La Grande Motte, France. Proceedings of SilviLaser... La Grande Motte, France: IGN, 2015. p. 81-83.| Biblioteca(s): Embrapa Territorial. |
| |
| 10. | | VARGAS JUNIOR, F. M. de; SOUZA, C. G. de; COSTA, J. A. A. da; FERREIRA, M. B.; SOUZA, M. R. de; REIS, F. A.; LONGO, M. L. Compendio de conservación y producción de recursos zoogenéticos locales: los ovinos Pantaneiro. Archivos Latinoamericanos de Producción Animal, v. 28, n. 34, p. 165-180, 2020.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
| |
| 11. | | VARGAS JUNIOR, F. M.; CANSIAN, K.; PEREIRA, H. L.; LONGO, M. L.; VALÉRIO, A. C.; ORRICO JUNIOR, M. A. P.; RETORE, M.; SIQUEIRA, A. B. R.; FERNANDES, T. Ingestive behaviour and performance of feedlot lambs fed saccharine sorghum and corn silages. South African Journal of Animal Science, v. 50, n. 2, p. 233-240, 2020.| Biblioteca(s): Embrapa Agropecuária Oeste. |
| |
| 12. | | SALESKA, S.; RESTREPO-COUPE, N.; CAMPOS, K. S.; ALVES, L.; IVANOV, V.; LONGO, M.; OLIVEIRA JUNIOR, R. C. de; SILVA, R.; SMITH, M.; TAPAJOS, R.; TAYLOR, T. Do local-scale climate tipping points exist in Amazon forests, and can they warn of impending basin-scale tipping point vulnerability? In: EGU GENERAL ASSEMBLY, 2024, Vienna, Austria. EGU24-14707. Abstract. [S.l.]: EGU, 2024.| Biblioteca(s): Embrapa Amazônia Oriental. |
| |
| 13. | | STARK, S. C.; ENQUIST, B. J.; SALESKA, S. R.; LEITOLD, V.; SCHIETTI, J.; LONGO, M.; ALVES, L. F.; CAMARGO, P. B.; OLIVEIRA, R. C. Linking canopy leaf area and light environments with tree size distributions to explain Amazon forest demography. Ecology Letters, v. 18, n. 7, p. 636-645, July 2015.| Biblioteca(s): Embrapa Amazônia Oriental. |
|  |
| 14. | | TEODORO, A. L.; OLIVEIRA, M. V. M.; VARGAS JUNIOR, F. M.; JULIANO, R. S.; LONGO, M. L.; SENO, L. O.; OLIVEIRA, C. A. L. Níveis de proteína na dieta de novilhas da raça pantaneira: desempenho e digestibilidade aparente. Archivos de Zootecnia, v. 62, n. 239, p. 369-378, 2013. 10 p.| Biblioteca(s): Embrapa Pantanal. |
| |
| 15. | | VARGAS JÚNIOR, F. M. de; JACINTO, M. A. C.; MARTINS, C. F.; PINTO, G. S.; REIS, F. A.; OLIVEIRA, A. R.; OSÓRIO, J. C. S.; LONGO, M. L. Espesor y resistencia de la piel ovina según genotipo. In: CONGRESO DE LA SOCIEDAD ESPAÑOLA DE OVINOTECNIA Y CAPRINOTECNIA, 36, 2011, Donostia, San Sebastián. Actas... Donostia, San Sebastián: Sociedad Española Ovinotecnia Caprinotecnia, 2011. p. 300-303.| Biblioteca(s): Embrapa Caprinos e Ovinos; Embrapa Gado de Corte. |
| |
| 16. | | WOFSY, S.; HAYEK, M.; SALESKA, S.; LONGO, M.; MOORCROFT, P.; MUNGER, J.; RESTREPO-COUPE, N.; WIEDEMANN, K.; SILVA, R. da; CAMARGO, P.; COSME, R.; ALVES, L. Response of Amazonian tropical forests to short- and long-term climatic variations. In: AGU FALL MEETING, 2014, San Francisco. [Proceedings]. [San Francisco]: AGU, 2014.| Biblioteca(s): Embrapa Amazônia Oriental. |
| |
| 17. | | SCARANELLO, M. A.; LONGO, M.; SANTOS, M. N. dos S.; KELLER, M.; LEITOLD, V.; MORTON, D. C.; BOLFE, E. L.; BATISTELLA, M. Uso de lidar para quantificação de mudanças no estoque de carbono acima do solo em São Jorge, Pará. In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 18., 2017, Santos. Anais... Santos: Inpe, 2017. 3307-3314| Biblioteca(s): Embrapa Unidades Centrais. |
| |
| 18. | | RESTREPO-COUPE, N.; CHRISTOFFERSEN, B. O.; LONGO, M.; ALVES, L. F.; CAMPOS, K. S.; ARAUJO, A. C. de; OLIVEIRA JUNIOR, R. C. de; PROHASKA, N.; SILVA, R. da; TAPAJOS, R.; WIEDEMANN, K. T.; WOFSY, S. C.; SALESKA, S. R. Asymmetric response of Amazon forest water and energy fluxes to wet and dry hydrological extremes reveals onset of a local drought-induced tipping point. Global Change Biology, v. 29, n. 21, p. 6077-6092, Nov. 2023.| Biblioteca(s): Embrapa Amazônia Oriental. |
| |
| 19. | | ARANDA, A. N.; SILVA, M. C.; SOUZA, L. H.; LONGO, M. L.; CANSIAN, K.; COSTA, J. A.; REIS, F. A.; BARBOSA-FERREIRA, M.; VARGAS JUNIOR, F. M.; GRISOLIA, A. B. Levantamento e validação de hipóteses relacionadas ao fenótipo de ovelhas pantaneiras: contribuições para o padrão racial. In: SIMPOSIO IBEROAMERICANO SOBRE CONSERVACIÓN Y UTILIZACIÓN DE RECURSOS ZOOGENÉTICOS, 18., 2017, Chiquimula, Guatemala. [Anais...]. São Carlos de Guatemala: Universidad de São Carlos de Guatemala, 2017. p. 24.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
| |
| 20. | | JACINTO, M. A. C.; MARTINS, C. F.; PINTO, G. S.; REIS, F. A.; OLIVEIRA, A. R. de; OSÓRIO, J. C. S.; LONGO, M. L.; VARGAS JÚNIOR, F. M. de. Espesor y resistencia de la piel ovina según genotipo. In: CONGRESO DE LA SOCIEDAD ESPAÑOLA DE OVINOTECNIA Y CAPRINOTECNIA, 36., 2011, Donostia, San Sebastián. Actas... Donostia, San Sebastián: Sociedad Española Ovinotecnia Caprinotecnia, 2011. p. 300-303.| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| Registros recuperados : 26 | |
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Territorial. |
|
Data corrente: |
10/06/2016 |
|
Data da última atualização: |
13/06/2016 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
MORTON, D. C.; RUBIO, J.; COOK, B. D.; GASTELLU-ETCHEGORRY, J-P; LONGO, M.; CHOI, H.; HUNTER, M.; KELLER, M. |
|
Afiliação: |
DOUGLAS C. MORTON, NASA; JEREMY RUBIO, NASA - Université de Toulouse; BRUCE D. COOK, NASA; JEAN-PHILIPPE GASTELLU-ETCHEGORRY, Université de Toulouse; MARCOS LONGO, BOLSISTA CNPM; HYEUNGU CHOI, Global Science & Technology Inc.; MARIA HUNTER, University of New Hampshire; MICHAEL KELLER, USDA Forest Service/ Pesquisador visitante CNPM. |
|
Título: |
Amazon forest structure generates diurnal and seasonal variability in light utilization. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
Biogeosciences, v. 13, p. 2195?2206, 2016. |
|
DOI: |
10.5194/bg-13-2195-2016 |
|
Idioma: |
Português |
|
Conteúdo: |
The complex three-dimensional (3-D) structure of tropical forests generates a diversity of light environments for canopy and understory trees. Understanding diurnal and seasonal changes in light availability is critical for interpreting measurements of net ecosystem exchange and improving ecosystem models. Here, we used the Discrete Anisotropic Radiative Transfer (DART) model to simulate leaf absorption of photosynthetically active radiation (lAPAR) for an Amazon forest. The 3-D model scene was developed from airborne lidar data, and local measurements of leaf reflectance, aerosols, and PAR were used to model lAPAR under direct and diffuse illumination conditions. Simulated lAPAR under clear-sky and cloudy conditions was corrected for light saturation effects to estimate light utilization, the fraction of lAPAR available for photosynthesis. Although the fraction of incoming PAR absorbed by leaves was consistent throughout the year (0.80?0.82), light utilization varied seasonally (0.67?0.74), with minimum values during the Amazon dry season. Shadowing and light saturation effects moderated potential gains in forest productivity from increasing PAR during dry-season months when the diffuse fraction from clouds and aerosols was low. Comparisons between DART and other models highlighted the role of 3-D forest structure to account for seasonal changes in light utilization. Our findings highlight how directional illumination and forest 3-D structure combine to influence diurnal and seasonal variability in light utilization, independent of further changes in leaf area, leaf age, or environmental controls on canopy photosynthesis. Changing illumination geometry constitutes an alternative biophysical explanation for observed seasonality in Amazon forest productivity without changes in canopy phenology. MenosThe complex three-dimensional (3-D) structure of tropical forests generates a diversity of light environments for canopy and understory trees. Understanding diurnal and seasonal changes in light availability is critical for interpreting measurements of net ecosystem exchange and improving ecosystem models. Here, we used the Discrete Anisotropic Radiative Transfer (DART) model to simulate leaf absorption of photosynthetically active radiation (lAPAR) for an Amazon forest. The 3-D model scene was developed from airborne lidar data, and local measurements of leaf reflectance, aerosols, and PAR were used to model lAPAR under direct and diffuse illumination conditions. Simulated lAPAR under clear-sky and cloudy conditions was corrected for light saturation effects to estimate light utilization, the fraction of lAPAR available for photosynthesis. Although the fraction of incoming PAR absorbed by leaves was consistent throughout the year (0.80?0.82), light utilization varied seasonally (0.67?0.74), with minimum values during the Amazon dry season. Shadowing and light saturation effects moderated potential gains in forest productivity from increasing PAR during dry-season months when the diffuse fraction from clouds and aerosols was low. Comparisons between DART and other models highlighted the role of 3-D forest structure to account for seasonal changes in light utilization. Our findings highlight how directional illumination and forest 3-D structure combine to influence diurnal an... Mostrar Tudo |
|
Thesaurus NAL: |
Tropical forests. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/144318/1/4729.pdf
|
|
Marc: |
LEADER 02479naa a2200229 a 4500
001 2046806
005 2016-06-13
008 2016 bl uuuu u00u1 u #d
024 7 $a10.5194/bg-13-2195-2016$2DOI
100 1 $aMORTON, D. C.
245 $aAmazon forest structure generates diurnal and seasonal variability in light utilization.$h[electronic resource]
260 $c2016
520 $aThe complex three-dimensional (3-D) structure of tropical forests generates a diversity of light environments for canopy and understory trees. Understanding diurnal and seasonal changes in light availability is critical for interpreting measurements of net ecosystem exchange and improving ecosystem models. Here, we used the Discrete Anisotropic Radiative Transfer (DART) model to simulate leaf absorption of photosynthetically active radiation (lAPAR) for an Amazon forest. The 3-D model scene was developed from airborne lidar data, and local measurements of leaf reflectance, aerosols, and PAR were used to model lAPAR under direct and diffuse illumination conditions. Simulated lAPAR under clear-sky and cloudy conditions was corrected for light saturation effects to estimate light utilization, the fraction of lAPAR available for photosynthesis. Although the fraction of incoming PAR absorbed by leaves was consistent throughout the year (0.80?0.82), light utilization varied seasonally (0.67?0.74), with minimum values during the Amazon dry season. Shadowing and light saturation effects moderated potential gains in forest productivity from increasing PAR during dry-season months when the diffuse fraction from clouds and aerosols was low. Comparisons between DART and other models highlighted the role of 3-D forest structure to account for seasonal changes in light utilization. Our findings highlight how directional illumination and forest 3-D structure combine to influence diurnal and seasonal variability in light utilization, independent of further changes in leaf area, leaf age, or environmental controls on canopy photosynthesis. Changing illumination geometry constitutes an alternative biophysical explanation for observed seasonality in Amazon forest productivity without changes in canopy phenology.
650 $aTropical forests
700 1 $aRUBIO, J.
700 1 $aCOOK, B. D.
700 1 $aGASTELLU-ETCHEGORRY, J-P
700 1 $aLONGO, M.
700 1 $aCHOI, H.
700 1 $aHUNTER, M.
700 1 $aKELLER, M.
773 $tBiogeosciences$gv. 13, p. 2195?2206, 2016.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Territorial (CNPM) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
