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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: |
22/08/2006 |
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Data da última atualização: |
28/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VASCONCELOS, S. S.; ZARIN, D. J.; CAPANU, M.; LITTELL, R.; DAVIDSON, E. A.; ISHIDA, F. Y.; SANTOS, E. B.; ARAÚJO, M. M.; ARAGÃO, D. V.; RANGEL-VASCONCELOS, L. G. T.; OLIVEIRA, F. de A.; MCDOWELL, W. H.; CARVALHO, C. J. R. de. |
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Afiliação: |
STEEL S. VASCONCELOS, University of Florida; CLAUDIO JOSE REIS DE CARVALHO, CPATU. |
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Título: |
Moisture and substrate availability constrain soil trace gas fluxes in an eastern Amazonian regrowth forest. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Global Biogeochemical Cycles, v. 18, n. 2, p. 1-10, Jun. 2004. |
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DOI: |
10.1029/2003GB002210 |
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Idioma: |
Inglês |
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Conteúdo: |
Changes in land-use and climate are likely to alter moisture and substrate availability in tropical forest soils, but quantitative assessment of the role of resource constraints as regulators of soil trace gas fluxes is rather limited. The primary objective of this study was to quantify the effects of moisture and substrate availability on soil trace gas fluxes in an Amazonian regrowth forest. We measured the efflux of carbon dioxide (CO2), nitric oxide (NO), nitrous oxide (N2O), and methane (CH4) from soil in response to two experimental manipulations. In the first, we increased soil moisture availability during the dry season by irrigation; in the second, we decreased substrate availability by continuous removal of aboveground litter. In the absence of irrigation, soil CO2 efflux decreased during the dry season while irrigation maintained soil CO2 efflux levels similar to the wet season. Large variations in soil CO2 efflux consistent with a significant moisture constraint on respiration were observed in response to soil wet-up and dry-down events. Annual soil C efflux for irrigated plots was 27 and 13% higher than for control plots in 2001 and 2002, respectively. Litter removal significantly reduced soil CO2 efflux; annual soil C efflux in 2002 was 28% lower for litter removal plots compared to control plots. The annual soil C efflux:litterfall C ratio for the control treatment (4.0?5.2) was consistent with previously reported values for regrowth forests that indicate a relatively large belowground C allocation. In general, fluxes of N2O and CH4 were higher during the wet season and both fluxes increased during dry-season irrigation. There was no seasonal effect on NO fluxes. Litter removal had no significant impact on N oxide or CH4 emissions. Net soil nitrification did not respond to dry-season irrigation, but was somewhat reduced by litter removal. Overall, these results demonstrate significant soil moisture and substrate constraints on soil trace gas emissions, particularly for CO2, and suggest that climate and land-use changes that alter moisture and substrate availability are therefore likely to have an impact on atmosphere chemistry. MenosChanges in land-use and climate are likely to alter moisture and substrate availability in tropical forest soils, but quantitative assessment of the role of resource constraints as regulators of soil trace gas fluxes is rather limited. The primary objective of this study was to quantify the effects of moisture and substrate availability on soil trace gas fluxes in an Amazonian regrowth forest. We measured the efflux of carbon dioxide (CO2), nitric oxide (NO), nitrous oxide (N2O), and methane (CH4) from soil in response to two experimental manipulations. In the first, we increased soil moisture availability during the dry season by irrigation; in the second, we decreased substrate availability by continuous removal of aboveground litter. In the absence of irrigation, soil CO2 efflux decreased during the dry season while irrigation maintained soil CO2 efflux levels similar to the wet season. Large variations in soil CO2 efflux consistent with a significant moisture constraint on respiration were observed in response to soil wet-up and dry-down events. Annual soil C efflux for irrigated plots was 27 and 13% higher than for control plots in 2001 and 2002, respectively. Litter removal significantly reduced soil CO2 efflux; annual soil C efflux in 2002 was 28% lower for litter removal plots compared to control plots. The annual soil C efflux:litterfall C ratio for the control treatment (4.0?5.2) was consistent with previously reported values for regrowth forests that indicate a re... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Irrigação; Metano; Respiração do Solo; Teor de Umidade. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03200naa a2200349 a 4500
001 1408531
005 2022-11-28
008 2004 bl uuuu u00u1 u #d
024 7 $a10.1029/2003GB002210$2DOI
100 1 $aVASCONCELOS, S. S.
245 $aMoisture and substrate availability constrain soil trace gas fluxes in an eastern Amazonian regrowth forest.$h[electronic resource]
260 $c2004
520 $aChanges in land-use and climate are likely to alter moisture and substrate availability in tropical forest soils, but quantitative assessment of the role of resource constraints as regulators of soil trace gas fluxes is rather limited. The primary objective of this study was to quantify the effects of moisture and substrate availability on soil trace gas fluxes in an Amazonian regrowth forest. We measured the efflux of carbon dioxide (CO2), nitric oxide (NO), nitrous oxide (N2O), and methane (CH4) from soil in response to two experimental manipulations. In the first, we increased soil moisture availability during the dry season by irrigation; in the second, we decreased substrate availability by continuous removal of aboveground litter. In the absence of irrigation, soil CO2 efflux decreased during the dry season while irrigation maintained soil CO2 efflux levels similar to the wet season. Large variations in soil CO2 efflux consistent with a significant moisture constraint on respiration were observed in response to soil wet-up and dry-down events. Annual soil C efflux for irrigated plots was 27 and 13% higher than for control plots in 2001 and 2002, respectively. Litter removal significantly reduced soil CO2 efflux; annual soil C efflux in 2002 was 28% lower for litter removal plots compared to control plots. The annual soil C efflux:litterfall C ratio for the control treatment (4.0?5.2) was consistent with previously reported values for regrowth forests that indicate a relatively large belowground C allocation. In general, fluxes of N2O and CH4 were higher during the wet season and both fluxes increased during dry-season irrigation. There was no seasonal effect on NO fluxes. Litter removal had no significant impact on N oxide or CH4 emissions. Net soil nitrification did not respond to dry-season irrigation, but was somewhat reduced by litter removal. Overall, these results demonstrate significant soil moisture and substrate constraints on soil trace gas emissions, particularly for CO2, and suggest that climate and land-use changes that alter moisture and substrate availability are therefore likely to have an impact on atmosphere chemistry.
650 $aAmazonia
650 $aIrrigação
650 $aMetano
650 $aRespiração do Solo
650 $aTeor de Umidade
653 $aBrasil
700 1 $aZARIN, D. J.
700 1 $aCAPANU, M.
700 1 $aLITTELL, R.
700 1 $aDAVIDSON, E. A.
700 1 $aISHIDA, F. Y.
700 1 $aSANTOS, E. B.
700 1 $aARAÚJO, M. M.
700 1 $aARAGÃO, D. V.
700 1 $aRANGEL-VASCONCELOS, L. G. T.
700 1 $aOLIVEIRA, F. de A.
700 1 $aMCDOWELL, W. H.
700 1 $aCARVALHO, C. J. R. de
773 $tGlobal Biogeochemical Cycles$gv. 18, n. 2, p. 1-10, Jun. 2004.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Registros recuperados : 9 | |
| 1. |  | LUCAS, N. M.; CASTILHOS, Z. M. de S.; SAIBRO, J. C. de; SAVIAN, J. F.; VARELLA, A. C. Rendimento de forragem e taxa de crescimento diário de cultivares de Panicum maximum Jacq. ao sol e sob sombra de Eucalipto no Planalto Médio do RS. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p. 419-421. (Embrapa Florestas. Documentos, 98).| Biblioteca(s): Embrapa Florestas. |
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| 2. | | VARELLA, A. C.; BARRO, R.; PONTES, L. S.; SILVA, J. L. S.; PORFIRIO-DA-SILVA, V.; SAIBRO, J. C. Seleção, manejo e produtividade do componente forrageiro em sistemas silvipastoris. Integración Ganadería Forestación, n. 1, p. 42-51, oct. 2017. Edição do I Seminario en Sistemas Silvopastoriles. Producción integrada para optimizar la rentabilidad.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas; Embrapa Pecuária Sul. |
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| 3. | | VARELLA, A. C.; BARRO, R. S.; SILVA, J. L. S. da; PORFIRIO-DA-SILVA, V.; SAIBRO, J. C. de. Silvopastoral systems in the cold zone of Brazil. In: PERI, P. L.; DUBE, F.; VARELLA, A. (Ed.). Silvopastoral systems in Southern South America. [Cham]: Springer International Publishing Switzerland, 2016. p. 231-255. (Advances in agroforestry, 11).| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Clima Temperado; Embrapa Florestas; Embrapa Pecuária Sul. |
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| 4. | | LUCAS, N. M.; CASTILHOS, Z. M. de S.; SILVA, J. L. S. da; SAVIAN, J. F.; SAIBRO, J. C. de. Desempenho animal e dinâmica de pastagens estivais sob sistema silvipastoril com acácia-negra no planalto médio do RS. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p.128-130. (Embrapa Florestas. Documentos, 98).| Biblioteca(s): Embrapa Florestas. |
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| 5. | | VARELLA, A. C.; PORFIRIO-DA-SILVA, V.; RIBASKI, J.; SOARES, A. B.; MORAES, A.; MORAIS, H.; SAIBRO, J. C. de; BARRO, R. S. Estabelecimento de plantas forrageiras em sistemas de integração floresta-pecuária no Sul do Brasil. In: FONTANELI, R. S.; SANTOS, H. P. dos; FONTANELI, R. S. (Ed.). Forrageiras para integração lavoura-pecuária-floresta na região sul-brasileira. Passo Fundo: Embrapa Trigo, 2009. p. 283-303.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Florestas. |
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| 6. | | VARELLA, A. C.; PORFIRIO-DA-SILVA, V.; RIBASKI, J.; SOARES, A. B.; MORAES, A. de; MORAIS, H.; SAIBRO, J. C. de; BARRO, R. S. Estabelecimento de plantas forrageiras em sistemas de integração floresta-pecuária no Sul do Brasil. 2. ed. In: FONTANELI, R. S.; SANTOS, H. P. dos; FONTANELI, R. S. (Ed.). Forrageiras para integração lavoura-pecuária-floresta na região sul-brasileira. Brasília, DF: Embrapa, 2012. p. 435-460.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Florestas; Embrapa Pecuária Sul. |
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| 7. | | SAIBRO, J. C.; CASTILHOS, Z. M. S.; SILVA, J. L. S. da; VARELLA, A. C.; LUCAS, N. M.; SAVIAN, J. F. Gestão em sistemas silvipastoris no Rio Grande do Sul: Desempenho animal. In: SIMPÓSIO LATINO-AMERICANO SOBRE MANEJO FLORESTAL, 3., 2004, Santa Maria. Anais. Santa Maria: UFSM, Programa de Pós-Graduação em Engenharia Florestal, 2004. p.450-460. Palestras.| Biblioteca(s): Embrapa Florestas. |
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| 8. | | VARELLA, A. C.; BARRO, R. S.; PONTES, L. DA S.; SILVA, J. L. S. da; PORFIRIO-DA-SILVA, V.; SAIBRO, J. C. de; MAIA, M. B. Manejo de pastagens subtropicais e temperadas para a integração floresta-pecuária. In: BUNGENSTAB, D. J.; ALMEIDA, R. G. de; LAURA, V. A.; BALBINO, L. C.; FERREIRA, A. D. (Ed.). ILPF: inovação com integração de lavoura, pecuária e floresta. Brasília, DF: Embrapa, 2019. p. 405-427.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Clima Temperado; Embrapa Florestas; Embrapa Pecuária Sul. |
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| 9. | | VARELLA, A. C.; RIBASKI, J.; SILVA, V. P.; SOARES, A. B.; MORAES, A.; MORAIS, H.; SAIBRO, J. C.; BARRO, R. S.; POLI, C. H. E. C.; PAULINO, B. M. Recomendações para a escolha e manejo de plantas forrageiras em sistemas silvipastoris no Sul do Brasil. Bagé: Embrapa Pecuária Sul, 2008. 25 p. il. color. (Embrapa Pecuária Sul. Documentos, 76). Disponível no formato online.| Biblioteca(s): Embrapa Florestas; Embrapa Pecuária Sul. |
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| Registros recuperados : 9 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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