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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: |
25/09/2012 |
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Data da última atualização: |
10/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VASCONCELOS, S. S.; ZARIN, D. J.; ARAÚJO, M. M.; MIRANDA, I. de S. |
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Afiliação: |
STEEL SILVA VASCONCELOS, CPATU; DANIEL JACOB ZARIN, UNIVERSITY OF FLORIDA; MARISTELA MACHADO ARAÚJO, UNIVERSIDADE FEDERAL DE SANTA MARIA; IZILDINHA DE SOUZA MIRANDA, UFRA. |
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Título: |
Aboveground net primary productivity in tropical forest regrowth increases following wetter dry-seasons. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 276, p. 82-87, Jul. 2012. |
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DOI: |
http://dx.doi.org.ez103.periodicos.capes.gov.br/10.1016/j.foreco.2012.03.034 |
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Idioma: |
Inglês |
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Conteúdo: |
Aboveground net primary productivity (ANPP) represents an important integrated measure of resource effects on forest ecosystem functions. Rates of ANPP, as well as resource availability controls over ANPP, are poorly understood for tropical forest regrowth following agricultural abandonment, although such regrowth accounts for a large and growing proportion of tropical landscapes. Here, we report on the response of ANPP to inter-annual variability in dry-season precipitation and to four years of dry-season irrigation in a forest regrowth stand in eastern Amazonia. ANPP was most strongly correlated with previous-year annual and dry-season precipitation inputs, suggesting a lag effect of the influence of precipitation on ANPP. The dry-season irrigation experiment provides some confirmation of this lag effect: ANPP response to treatment was significant for 2002 and 2003, following strong previous-year dry seasons, but not during the first treatment year (2001) or 2004, following the weak 2003 dry season. ANPP response to both inter-annual precipitation variability and to dry-season was largely due to a response in aboveground biomass increment rather than litterfall. Drought constraints on aboveground biomass increment suggest that the potential of forest regrowth to sequester atmospheric carbon will decrease with projected reductions in regional rainfall. |
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Thesagro: |
Biomassa; Floresta Secundaria; 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 02102naa a2200217 a 4500
001 1934504
005 2022-11-10
008 2012 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org.ez103.periodicos.capes.gov.br/10.1016/j.foreco.2012.03.034$2DOI
100 1 $aVASCONCELOS, S. S.
245 $aAboveground net primary productivity in tropical forest regrowth increases following wetter dry-seasons.$h[electronic resource]
260 $c2012
520 $aAboveground net primary productivity (ANPP) represents an important integrated measure of resource effects on forest ecosystem functions. Rates of ANPP, as well as resource availability controls over ANPP, are poorly understood for tropical forest regrowth following agricultural abandonment, although such regrowth accounts for a large and growing proportion of tropical landscapes. Here, we report on the response of ANPP to inter-annual variability in dry-season precipitation and to four years of dry-season irrigation in a forest regrowth stand in eastern Amazonia. ANPP was most strongly correlated with previous-year annual and dry-season precipitation inputs, suggesting a lag effect of the influence of precipitation on ANPP. The dry-season irrigation experiment provides some confirmation of this lag effect: ANPP response to treatment was significant for 2002 and 2003, following strong previous-year dry seasons, but not during the first treatment year (2001) or 2004, following the weak 2003 dry season. ANPP response to both inter-annual precipitation variability and to dry-season was largely due to a response in aboveground biomass increment rather than litterfall. Drought constraints on aboveground biomass increment suggest that the potential of forest regrowth to sequester atmospheric carbon will decrease with projected reductions in regional rainfall.
650 $aAmazonia
650 $aBiomassa
650 $aFloresta Secundaria
650 $aFloresta Tropical
700 1 $aZARIN, D. J.
700 1 $aARAÚJO, M. M.
700 1 $aMIRANDA, I. de S.
773 $tForest Ecology and Management$gv. 276, p. 82-87, Jul. 2012.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
13/08/2007 |
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Data da última atualização: |
08/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
ARAÚJO, G. C. L.; LEMOS, S. G.; FERREIRA, A. G.; FREITAS, H.; NOGUEIRA, A. R. de A. |
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Afiliação: |
G. C. L. ARAÚJO, UFSCar; SERLAN G. LEMOS, UFSCar; ANTONIO GILBERTO FERREIRA, UFSCar; H. FREITAS, UFSCar; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Effect of pre-treatment and supporting media on Ni(II), Cu(II), Al(III) and Fe(III) sorption by plant root material. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Chemosphere, v. 68, n. 3, p. 537-545, jun. 2007. |
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DOI: |
10.1016/j.chemosphere.2006.12.054 |
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Idioma: |
Inglês |
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Conteúdo: |
In this work Paspalum notatum root material was used to elucidate the influence of acid leaching pre-treatment and of sorption medium on metal adsorption. Ground P. notatum root was leached with 0.14 M HNO3. Leached root material (LRM) and non-leached root material (NLRM) were employed to flow sorption of Ni(II), Cu(II), Al(III) and Fe(III) in 0.5 M CH3COONH4 medium at pH 6.5. For LRM the sorption was also studied in 0.5 M KNO3 medium. The acid pre-treatment increased the sorption capacity (SC) for all ions studied. For the KNO3 medium, Cu(II) and Fe(III) sorption was higher than in CH3COONH4 and the type of the Ni(II) isotherm?s model changed. The Freundlich model was the most representative isotherm model to describe metallic ions sorption. The 1H NMR spectra showed differences between LRM and NLRM and the acid-basic potentiometric titration elucidated that acid-leaching procedure affected the root material sorption sites once only two predominant sorption sites were found for LRM (phenolic and amine, both able cations sorption) and five sorption sites (two carboxylic, amine and two phenolic) were founded for NLRM. |
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Palavras-Chave: |
Pre treatment effect; Sorption sites investigation; Supporting media. |
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Thesaurus NAL: |
biosorption. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 01874naa a2200229 a 4500
001 1032566
005 2023-03-08
008 2007 bl uuuu u00u1 u #d
024 7 $a10.1016/j.chemosphere.2006.12.054$2DOI
100 1 $aARAÚJO, G. C. L.
245 $aEffect of pre-treatment and supporting media on Ni(II), Cu(II), Al(III) and Fe(III) sorption by plant root material.$h[electronic resource]
260 $c2007
520 $aIn this work Paspalum notatum root material was used to elucidate the influence of acid leaching pre-treatment and of sorption medium on metal adsorption. Ground P. notatum root was leached with 0.14 M HNO3. Leached root material (LRM) and non-leached root material (NLRM) were employed to flow sorption of Ni(II), Cu(II), Al(III) and Fe(III) in 0.5 M CH3COONH4 medium at pH 6.5. For LRM the sorption was also studied in 0.5 M KNO3 medium. The acid pre-treatment increased the sorption capacity (SC) for all ions studied. For the KNO3 medium, Cu(II) and Fe(III) sorption was higher than in CH3COONH4 and the type of the Ni(II) isotherm?s model changed. The Freundlich model was the most representative isotherm model to describe metallic ions sorption. The 1H NMR spectra showed differences between LRM and NLRM and the acid-basic potentiometric titration elucidated that acid-leaching procedure affected the root material sorption sites once only two predominant sorption sites were found for LRM (phenolic and amine, both able cations sorption) and five sorption sites (two carboxylic, amine and two phenolic) were founded for NLRM.
650 $abiosorption
653 $aPre treatment effect
653 $aSorption sites investigation
653 $aSupporting media
700 1 $aLEMOS, S. G.
700 1 $aFERREIRA, A. G.
700 1 $aFREITAS, H.
700 1 $aNOGUEIRA, A. R. de A.
773 $tChemosphere$gv. 68, n. 3, p. 537-545, jun. 2007.
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