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	Provedor de dados Acta Amazonica (2) Autor PAROLIN,Pia (2) ARMBRÜSTER,Nicole (1) JUNK,Wolfgang J. (1) WORBES,Martin (1) Palavra-chave Amazonia (1) Blackwater floodplain forest (1) Central Amazonia (1) Floodplain (1) Growth strategy (1) Igapó (1) Increment rings (1) Leaf nitrogen (1) Rio Jaú (1) Várzea (1) Waterlogging (1) Wood density (1) Wood specific gravity (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2002 (1) 2000 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Wood density of trees in black water floodplains of Rio Jaú National Park, Amazonia, Brazil Acta Amazonica PAROLIN,Pia; WORBES,Martin. The Jaú National Park is the largest protected forested area in the world. The Vitória Amazônica Foundation is working towards understanding its ecosystem, to which this paper contributes. Wood density was analysed in 27 common tree species growing in the blackwater flood-plains of the Rio Jaú, an affluent of the Rio Negro (Amazonia, Brazil). Wood was sampled with an increment borer. Mean wood density of the analysed species ranged from 0.35 to 0.87 g cm-3. The mean of all sampled species was 0.67 g cm-3 (st. dev. 0.13). Lowest density was found for Hevea spruceana with 0.32 g cm-3 and highest for Crudia amazonica with 0.9 g cm-3. Tipo: Info:eu-repo/semantics/article Palavras-chave: Wood specific gravity; Wood density; Increment rings; Blackwater floodplain forest; Igapó; Rio Jaú; Central Amazonia. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000300441 Seasonal changes of leaf Nitrogen content in trees of Amazonian floodplains Acta Amazonica PAROLIN,Pia; ARMBRÜSTER,Nicole; JUNK,Wolfgang J.. In Amazonian floodplains the trees are exposed to extreme flooding of up to 230 days a year. Waterlogging of the roots and stems affects growth and metabolic activity of the trees. An increased leaf fall in the aquatic period and annual increment rings in the wood indicate periodical growth reductions. The present study aims at documenting seasonal changes of metabolism and vitality of adult trees in the annual cycle as expressed by changes of leaf nitrogen content. Leaves of six tree species common in floodplains in Central Amazonia and typical representants of different growth strategies were collected every month between May 1994 and June 1995 in the vicinity of Manaus, Brazil. Mean leaf nitrogen content varied between 1.3% and 3.2% in the non-flooded... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf nitrogen; Growth strategy; Waterlogging; Várzea; Floodplain; Amazonia. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672002000200231 Registros recuperados: 2 Primeira ... 1 ... Última

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