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| 45. |  | ALVES, E. R. de A.; SOUZA, G. da S. e. O Semiárido segundo o censo agropecuário 2006 e os censos de população 1991, 2000 e 2010. Revista de Política Agrícola, Brasília, DF., ano, 24, n.1, p. 74-85, Jan./Fev./Mar. 2015. Na publicação: Eliseu Alves.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 49. | | SOUZA, G. da S. e; GOMES, E. G. The effect of marketing imperfection variables on production in the context of brazilian agriculture. In: INTERNATIONAL CONFERENCE ON OPERATIONS RESEARCH AND ENTERPRISES SYSTEMS, 7., 2018, Funchal, Madeira, Portugal. Proceedings... Funchal, Madeira, Portugal: ScitePress, v.1, p. 15-20, 2018.| Biblioteca(s): Embrapa Unidades Centrais. |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
27/02/2008 |
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Data da última atualização: |
23/11/2022 |
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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: |
DAVIDSON, E. A.; CARVALHO, C. J. R. de; FIGUEIRA, A. M.; ISHIDA, F. Y.; OMETTO, J. P. H. B.; NARDOTO, G. B.; SABÁ, R. T.; HAYASHI, S. N.; LEAL, E. C.; VIEIRA, I. C. G.; MARTINELLI, L. A. |
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Afiliação: |
Eric A. Davidson, The Woods Hole Research Center; CLAUDIO JOSE REIS DE CARVALHO, CPATU; Adelaine Michela Figueira, CENA; Françoise Yoko Ishida, CENA; Jean Pierre H. B. Ometto, CENA; Gabriela B. Nardoto, CENA; Renata Tuma Sabá, bolsista CPATU; Sanae N. Hayashi, MPEG; Eliane C. Leal, MPEG; Ima Célia G. Vieira, MPEG; Luiz A. Martinelli, CENA. |
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Título: |
Recuperation of nitrogen cycling in Amazonian forests following agricultural abandonment. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Nature, v. 447, n. 7147, p. 995-998, Jun. 2007. |
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DOI: |
10.1038/nature05900 |
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Idioma: |
Português |
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Notas: |
Disponível também on-line. |
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Conteúdo: |
Phosphorus (P) is generally considered the most common limiting nutrient for productivity of mature tropical lowland forests growing on highly weathered soils1, 2, 3, 4, 5. It is often assumed that P limitation also applies to young tropical forests, but nitrogen (N) losses during land-use change may alter the stoichiometric balance of nutrient cycling processes. In the Amazon basin, about 16% of the original forest area has been cleared6, and about 30?50% of cleared land is estimated now to be in some stage of secondary forest succession following agricultural abandonment7. Here we use forest age chronosequences to demonstrate that young successional forests growing after agricultural abandonment on highly weathered lowland tropical soils exhibit conservative N-cycling properties much like those of N-limited forests on younger soils in temperate latitudes. As secondary succession progresses, N-cycling properties recover and the dominance of a conservative P cycle typical of mature lowland tropical forests re-emerges. These successional shifts in N:P cycling ratios with forest age provide a mechanistic explanation for initially lower and then gradually increasing soil emissions of the greenhouse gas nitrous oxide (N2O). The patterns of N and P cycling during secondary forest succession, demonstrated here over decadal timescales, are similar to N- and P-cycling patterns during primary succession as soils age over thousands and millions of years, thus revealing that N availability in terrestrial ecosystems is ephemeral and can be disrupted by either natural or anthropogenic disturbances at several timescales. MenosPhosphorus (P) is generally considered the most common limiting nutrient for productivity of mature tropical lowland forests growing on highly weathered soils1, 2, 3, 4, 5. It is often assumed that P limitation also applies to young tropical forests, but nitrogen (N) losses during land-use change may alter the stoichiometric balance of nutrient cycling processes. In the Amazon basin, about 16% of the original forest area has been cleared6, and about 30?50% of cleared land is estimated now to be in some stage of secondary forest succession following agricultural abandonment7. Here we use forest age chronosequences to demonstrate that young successional forests growing after agricultural abandonment on highly weathered lowland tropical soils exhibit conservative N-cycling properties much like those of N-limited forests on younger soils in temperate latitudes. As secondary succession progresses, N-cycling properties recover and the dominance of a conservative P cycle typical of mature lowland tropical forests re-emerges. These successional shifts in N:P cycling ratios with forest age provide a mechanistic explanation for initially lower and then gradually increasing soil emissions of the greenhouse gas nitrous oxide (N2O). The patterns of N and P cycling during secondary forest succession, demonstrated here over decadal timescales, are similar to N- and P-cycling patterns during primary succession as soils age over thousands and millions of years, thus revealing that N availabi... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Agricultura; Floresta; Nitrogênio. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02556naa a2200325 a 4500
001 1409000
005 2022-11-23
008 2007 bl uuuu u00u1 u #d
024 7 $a10.1038/nature05900$2DOI
100 1 $aDAVIDSON, E. A.
245 $aRecuperation of nitrogen cycling in Amazonian forests following agricultural abandonment.$h[electronic resource]
260 $c2007
500 $aDisponível também on-line.
520 $aPhosphorus (P) is generally considered the most common limiting nutrient for productivity of mature tropical lowland forests growing on highly weathered soils1, 2, 3, 4, 5. It is often assumed that P limitation also applies to young tropical forests, but nitrogen (N) losses during land-use change may alter the stoichiometric balance of nutrient cycling processes. In the Amazon basin, about 16% of the original forest area has been cleared6, and about 30?50% of cleared land is estimated now to be in some stage of secondary forest succession following agricultural abandonment7. Here we use forest age chronosequences to demonstrate that young successional forests growing after agricultural abandonment on highly weathered lowland tropical soils exhibit conservative N-cycling properties much like those of N-limited forests on younger soils in temperate latitudes. As secondary succession progresses, N-cycling properties recover and the dominance of a conservative P cycle typical of mature lowland tropical forests re-emerges. These successional shifts in N:P cycling ratios with forest age provide a mechanistic explanation for initially lower and then gradually increasing soil emissions of the greenhouse gas nitrous oxide (N2O). The patterns of N and P cycling during secondary forest succession, demonstrated here over decadal timescales, are similar to N- and P-cycling patterns during primary succession as soils age over thousands and millions of years, thus revealing that N availability in terrestrial ecosystems is ephemeral and can be disrupted by either natural or anthropogenic disturbances at several timescales.
650 $aAmazonia
650 $aAgricultura
650 $aFloresta
650 $aNitrogênio
653 $aBrasil
700 1 $aCARVALHO, C. J. R. de
700 1 $aFIGUEIRA, A. M.
700 1 $aISHIDA, F. Y.
700 1 $aOMETTO, J. P. H. B.
700 1 $aNARDOTO, G. B.
700 1 $aSABÁ, R. T.
700 1 $aHAYASHI, S. N.
700 1 $aLEAL, E. C.
700 1 $aVIEIRA, I. C. G.
700 1 $aMARTINELLI, L. A.
773 $tNature$gv. 447, n. 7147, p. 995-998, Jun. 2007.
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