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	Provedor de dados Scientia Agricola (1) Rev. Bras. Bot. (1) Autor Martinelli,L.A. (2) Camargo,P.B. de (1) Higuchi,N. (1) Mardegan,S.F. (1) Nardoto,G.B. (1) Reinert,F. (1) Salomão,R. de P. (1) Trumbore,S. (1) Mais... Palavra-chave Amazon (1) Brazil-nut (1) Radiocarbon age (1) Stable isotopes (1) White-sand vegetation (1) Δ13C (1) Δ15N (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (1) 1994 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Variation in nitrogen use strategies and photosynthetic pathways among vascular epiphytes in the Brazilian Central Amazon Rev. Bras. Bot. Mardegan,S.F.; Nardoto,G.B.; Higuchi,N.; Reinert,F.; Martinelli,L.A.. The variation in nitrogen use strategies and photosynthetic pathways among vascular epiphyte families was addressed in a white-sand vegetation in the Brazilian Central Amazon. Foliar nitrogen and carbon concentrations and their isotopic composition (δ15N and δ13C, respectively) were measured in epiphytes (Araceae, Bromeliaceae and Orchidaceae) and their host trees. The host tree Aldina heterophylla had higher foliar N concentration and lower C:N ratio (2.1 ± 0.06% and 23.6 ± 0.8) than its dwellers. Tree foliar δ15N differed only from that of the orchids. Comparing the epiphyte families, the aroids had the highest foliar N concentration and lowest C:N ratios (1.4 ± 0.1% and 34.9 ± 4.2, respectively). The orchids had more negative foliar δ15N values (-3.5 ±... Tipo: Info:eu-repo/semantics/article Palavras-chave: Δ13C; Δ15N; Stable isotopes; White-sand vegetation. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000100003 How old are large Brazil-nut trees (Bertholletia excelsa) in the Amazon? Scientia Agricola Camargo,P.B. de; Salomão,R. de P.; Trumbore,S.; Martinelli,L.A.. The age of a large Brazil-nut tree (Bertholletia excelsa) is measured by radiocarbon dating, and a discussion is made about their importance in the Amazon rain-forest ecosystem. Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Brazil-nut; Radiocarbon age. Ano: 1994 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000200028 Registros recuperados: 2 Primeira ... 1 ... Última

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