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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Pecuária Sul. |
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Data corrente: |
13/02/2020 |
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Data da última atualização: |
21/02/2020 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SMITH, M. N.; SCHITTI, J.; GONÇALVES, N.; MINOR, D.; ALMEIDA, D. R. A. de; ROCHA, D. G.; ARAGÓN, S.; MENIN, M.; GUEDES, M. C.; TONINI, H.; SILVA, K. E. da; ROSA, D. M.; NELSON, B. W.; CORDEIRO, C. L. O.; OLIVEIRA JUNIOR, R. C. de; SHAO, G.; SOUZA, M. S.; MCMAHON, S.; ALMEIDA, D.; ARAGÃO, L. E. O. C.; LIMA, N. Z. de; OLIVEIRA, G. de; ASSIS, R. L. de; CAMARGO, J. L.; MESQUITA, R. G.; SALESKA, S. R.; BRESHEARS, D. D.; COSTA, F. R. C.; STARK, S. C. |
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Afiliação: |
MARIELLE NATASHA SMITH, Michigan State University; JULIANA SCHITTI, INPA; NATHAN GONÇALVES, Michigan State University; DAVID MINOR, University of Maryland College Park; DANILO ROBERTI ALVES DE ALMEIDA, USP/ESALQ; DANIEL GOMES ROCHA, INPA; SUSAN ARAGÓN, UFOPA; MARCELO MENIN, UFAM; MARCELINO CARNEIRO GUEDES, CPAF-Amapá; HELIO TONINI, CPPSUL; KATIA EMIDIO DA SILVA, CPAA; DIOGO MARTINS ROSA, INPA; BRUCE W NELSON, INPA; CARLOS LEANDRO OLIVEIRA CORDEIRO, IIS; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; GANG SHAO, Michigan State University; MENDELL S. SOUZA, UFOPA; SEAN MCMAHON, Smithsonian Environmental Research Center (SERC); DANIEL ALMEIDA, UFOPA; LUIZ E. O. C. ARAGÃO, INPE; NICOLAS ZASLAVSKY DE LIMA, UFOPA; GABRIELA DE OLIVEIRA, University of Kansas; RAFAEL LEANDRO DE ASSIS, INPA; JOSÉ L. CAMARGO, INPA; RITA G MESQUITA, INPA; SCOTT R SALESKA, University of Arizona; DAVID D. BRESHEARS, University of Arizona; FLAVIA REGINA CAPELLOTTO COSTA, INPA; SCOTT C. STARK, Michigan State University. |
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Título: |
Variations in Amazonian forest canopy structure and light environments across environmental and disturbance gradients. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
In: AGU FALL MEETING, 2019, San Francisco. Anais... San Francisco: AGU, 2019. |
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Idioma: |
Inglês |
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Notas: |
Paper 499657. |
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Conteúdo: |
A critical problem in tropical forest ecology is understanding how vegetation structure and function vary over environmental gradients. The degree to which forest structure changes across the Amazon basin and the role of environmental variability in shaping forest structure and dynamics are poorly characterised, despite the importance of these forests for regional and global climate. To address these challenges, we connected 10 years of investigations to amass a large database of ground-based profiling canopy lidar (PCL) data from 297 Amazon forest plots across large-scale environmental and disturbance gradients. Mean annual precipitation varied from 1,963 to 3,159 mm, number of dry season months from 0 to 5, and plot soil types covered about half of the variation in phosphorus, exchangeable cation, and soil physical property values observed in Amazonia. We quantified detailed metrics of vertical and horizontal structure and canopy light environments. Forest structure varied considerably across plots; maximum canopy height ranged from 6.1 to 35.7 m, gap fraction from 0.00 to 0.36, LAI from 0.5 to 7.3, rugosity from 1.5 to 7.5 m, and the relative height of 50% light transmission from 0.3 to 0.8. Disturbed sites exhibited almost twice the level of variation (SD) to non-disturbed sites for many metrics. Vertical leaf area density (LAD) profiles also showed high between plot variability, especially at low and high relative canopy heights. Plots with similar LAD profiles sometimes exhibited different distributions of ?canopy photic environment layers??where canopy leaf area is separated into photic environment layers by depth from canopy surface. This demonstrates that LAD profiles alone are insufficient for characterising canopy environments, essential to light-driven regeneration and carbon cycle processes. In addition, we evaluated relationships between lidar metrics and environmental variables extracted from geospatial layers. Our dataset allows a unique and detailed multi-site analysis of canopy structure and environments across the Amazon, including regions with little or no lidar sampling. Examining how structural attributes alter across environmental gradients is critical to understanding how current and future climate influences Amazonian forest structure, function, and dynamics. MenosA critical problem in tropical forest ecology is understanding how vegetation structure and function vary over environmental gradients. The degree to which forest structure changes across the Amazon basin and the role of environmental variability in shaping forest structure and dynamics are poorly characterised, despite the importance of these forests for regional and global climate. To address these challenges, we connected 10 years of investigations to amass a large database of ground-based profiling canopy lidar (PCL) data from 297 Amazon forest plots across large-scale environmental and disturbance gradients. Mean annual precipitation varied from 1,963 to 3,159 mm, number of dry season months from 0 to 5, and plot soil types covered about half of the variation in phosphorus, exchangeable cation, and soil physical property values observed in Amazonia. We quantified detailed metrics of vertical and horizontal structure and canopy light environments. Forest structure varied considerably across plots; maximum canopy height ranged from 6.1 to 35.7 m, gap fraction from 0.00 to 0.36, LAI from 0.5 to 7.3, rugosity from 1.5 to 7.5 m, and the relative height of 50% light transmission from 0.3 to 0.8. Disturbed sites exhibited almost twice the level of variation (SD) to non-disturbed sites for many metrics. Vertical leaf area density (LAD) profiles also showed high between plot variability, especially at low and high relative canopy heights. Plots with similar LAD profiles sometime... Mostrar Tudo |
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Thesagro: |
Climatologia; Ecologia Florestal; Floresta Tropical. |
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Thesaurus Nal: |
Climatology; Forest ecology; Tropical forests. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03844naa a2200541 a 4500
001 2120544
005 2020-02-21
008 2019 bl uuuu u00u1 u #d
100 1 $aSMITH, M. N.
245 $aVariations in Amazonian forest canopy structure and light environments across environmental and disturbance gradients.$h[electronic resource]
260 $c2019
500 $aPaper 499657.
520 $aA critical problem in tropical forest ecology is understanding how vegetation structure and function vary over environmental gradients. The degree to which forest structure changes across the Amazon basin and the role of environmental variability in shaping forest structure and dynamics are poorly characterised, despite the importance of these forests for regional and global climate. To address these challenges, we connected 10 years of investigations to amass a large database of ground-based profiling canopy lidar (PCL) data from 297 Amazon forest plots across large-scale environmental and disturbance gradients. Mean annual precipitation varied from 1,963 to 3,159 mm, number of dry season months from 0 to 5, and plot soil types covered about half of the variation in phosphorus, exchangeable cation, and soil physical property values observed in Amazonia. We quantified detailed metrics of vertical and horizontal structure and canopy light environments. Forest structure varied considerably across plots; maximum canopy height ranged from 6.1 to 35.7 m, gap fraction from 0.00 to 0.36, LAI from 0.5 to 7.3, rugosity from 1.5 to 7.5 m, and the relative height of 50% light transmission from 0.3 to 0.8. Disturbed sites exhibited almost twice the level of variation (SD) to non-disturbed sites for many metrics. Vertical leaf area density (LAD) profiles also showed high between plot variability, especially at low and high relative canopy heights. Plots with similar LAD profiles sometimes exhibited different distributions of ?canopy photic environment layers??where canopy leaf area is separated into photic environment layers by depth from canopy surface. This demonstrates that LAD profiles alone are insufficient for characterising canopy environments, essential to light-driven regeneration and carbon cycle processes. In addition, we evaluated relationships between lidar metrics and environmental variables extracted from geospatial layers. Our dataset allows a unique and detailed multi-site analysis of canopy structure and environments across the Amazon, including regions with little or no lidar sampling. Examining how structural attributes alter across environmental gradients is critical to understanding how current and future climate influences Amazonian forest structure, function, and dynamics.
650 $aClimatology
650 $aForest ecology
650 $aTropical forests
650 $aClimatologia
650 $aEcologia Florestal
650 $aFloresta Tropical
700 1 $aSCHITTI, J.
700 1 $aGONÇALVES, N.
700 1 $aMINOR, D.
700 1 $aALMEIDA, D. R. A. de
700 1 $aROCHA, D. G.
700 1 $aARAGÓN, S.
700 1 $aMENIN, M.
700 1 $aGUEDES, M. C.
700 1 $aTONINI, H.
700 1 $aSILVA, K. E. da
700 1 $aROSA, D. M.
700 1 $aNELSON, B. W.
700 1 $aCORDEIRO, C. L. O.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aSHAO, G.
700 1 $aSOUZA, M. S.
700 1 $aMCMAHON, S.
700 1 $aALMEIDA, D.
700 1 $aARAGÃO, L. E. O. C.
700 1 $aLIMA, N. Z. de
700 1 $aOLIVEIRA, G. de
700 1 $aASSIS, R. L. de
700 1 $aCAMARGO, J. L.
700 1 $aMESQUITA, R. G.
700 1 $aSALESKA, S. R.
700 1 $aBRESHEARS, D. D.
700 1 $aCOSTA, F. R. C.
700 1 $aSTARK, S. C.
773 $tIn: AGU FALL MEETING, 2019, San Francisco. Anais... San Francisco: AGU, 2019.
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Registro original: |
Embrapa Pecuária Sul (CPPSUL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
01/11/1996 |
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Data da última atualização: |
04/02/2019 |
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Autoria: |
CABRAL, O. M. R. |
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Afiliação: |
OSVALDO MACHADO RODRIGUES CABRAL, CPAA. |
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Título: |
Armazenagem da água num solo com floresta de terra firme e com seringal implantado. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Sao Jose dos Campos: INPE, 1991. |
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Páginas: |
104p. |
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Idioma: |
Português |
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Notas: |
Dissertacao Mestrado. |
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Conteúdo: |
Foram realizadas medidas periodicas da umidade (sonda de neutrons) e potenciais matricos (tensiometros) em um solo com seringal implantado e com floresta de terra firme, no periodo de 1985-1986, em Manaus. No seringal, os niveis de umidade no solo foram elevados (>70% da capacidade de armazenamento) e, durante dez meses (novembro-agosto), foi observada a drenagem profunda do excesso de precipitacao. Durante a estacao seca de 1985 (setembro-outubro), a variacao no armazenamento de agua foi de (-27,4 a mais ou menos 6,6)mm na camada de (0-170)cm. A absorcao radicular mais intensa ocorreu entre (50-120)cm de solo, devido a compactacao nas profundidades entre (20-40)cm. Na floresta, mesmo durante a estacao das chuvas (janeiro-abril), em resposta as pequenas estiagens, foi observado absorcao de agua pela vegetacao nas camadas superficiais, interrompendo temporariamente o processo de drenagem profunda. A variacao de armazenamento, nesse periodo, foi de (-57 a mais ou menos 7,0)mm, abrangendo todo o perfil de (0-170)cm, embora, o conteudo de umidade tenha sido superior a 60% da capacidade de armazenamento de agua pelo solo. A taxa media de evapotranspiracao diaria da floresta, estimada em 1985, foi de (2,5 a mais ou menos 6)cm/dia, correspondendo a uma diferenca de 17% com relacao a floresta de terra firme. |
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Palavras-Chave: |
Amazonas; Brasil; Manaus; Rubber tree. |
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Thesagro: |
Água; Armazenamento; Evapotranspiração; Meteorologia; Seringueira; Solo; Umidade. |
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Thesaurus NAL: |
evapotranspiration; meteorology; soil; storage; water. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/191588/1/Tese-Oswaldo-ID-3398.pdf
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Marc: |
LEADER 02123nam a2200325 a 4500
001 1667434
005 2019-02-04
008 1991 bl uuuu m 00u1 u #d
100 1 $aCABRAL, O. M. R.
245 $aArmazenagem da água num solo com floresta de terra firme e com seringal implantado.
260 $aSao Jose dos Campos: INPE$c1991
300 $a104p.
500 $aDissertacao Mestrado.
520 $aForam realizadas medidas periodicas da umidade (sonda de neutrons) e potenciais matricos (tensiometros) em um solo com seringal implantado e com floresta de terra firme, no periodo de 1985-1986, em Manaus. No seringal, os niveis de umidade no solo foram elevados (>70% da capacidade de armazenamento) e, durante dez meses (novembro-agosto), foi observada a drenagem profunda do excesso de precipitacao. Durante a estacao seca de 1985 (setembro-outubro), a variacao no armazenamento de agua foi de (-27,4 a mais ou menos 6,6)mm na camada de (0-170)cm. A absorcao radicular mais intensa ocorreu entre (50-120)cm de solo, devido a compactacao nas profundidades entre (20-40)cm. Na floresta, mesmo durante a estacao das chuvas (janeiro-abril), em resposta as pequenas estiagens, foi observado absorcao de agua pela vegetacao nas camadas superficiais, interrompendo temporariamente o processo de drenagem profunda. A variacao de armazenamento, nesse periodo, foi de (-57 a mais ou menos 7,0)mm, abrangendo todo o perfil de (0-170)cm, embora, o conteudo de umidade tenha sido superior a 60% da capacidade de armazenamento de agua pelo solo. A taxa media de evapotranspiracao diaria da floresta, estimada em 1985, foi de (2,5 a mais ou menos 6)cm/dia, correspondendo a uma diferenca de 17% com relacao a floresta de terra firme.
650 $aevapotranspiration
650 $ameteorology
650 $asoil
650 $astorage
650 $awater
650 $aÁgua
650 $aArmazenamento
650 $aEvapotranspiração
650 $aMeteorologia
650 $aSeringueira
650 $aSolo
650 $aUmidade
653 $aAmazonas
653 $aBrasil
653 $aManaus
653 $aRubber tree
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Embrapa Amazônia Ocidental (CPAA) |
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