Use este identificador para citar ou linkar para este item:
https://repositorio.inpa.gov.br/handle/1/17768
Registro completo de metadados
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Nardoto, G. B. | - |
dc.contributor.author | Quesada, Carlos Alberto | - |
dc.contributor.author | Patiño, Sandra | - |
dc.contributor.author | Saiz, Gustavo | - |
dc.contributor.author | Baker, Timothy R. | - |
dc.contributor.author | Schwarz, Michael | - |
dc.contributor.author | Schrodt, Franziska | - |
dc.contributor.author | Feldpausch, Ted R. | - |
dc.contributor.author | null, Tomas | - |
dc.contributor.author | Marimon, Beatriz Schwantes | - |
dc.contributor.author | Marimon Júnior, Ben Hur | - |
dc.contributor.author | Guimarães Vieira, Ima Cèlia | - |
dc.contributor.author | Silveira, Marcos | - |
dc.contributor.author | Bird, Michael I. | - |
dc.contributor.author | Phillips, Oliver L. | - |
dc.contributor.author | Lloyd, Jon | - |
dc.contributor.author | Martinelli, Luiz Antônio | - |
dc.date.accessioned | 2020-06-15T21:49:10Z | - |
dc.date.available | 2020-06-15T21:49:10Z | - |
dc.date.issued | 2014 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/17768 | - |
dc.description.abstract | Background: Patterns in tropical forest nitrogen cycling are poorly understood. In particular, the extent to which leguminous trees in these forests fix nitrogen is unclear. Aims: We aimed to determine factors that explain variation in foliar δ15N (δ15NF) for Amazon forest trees, and to evaluate the extent to which putatively N2-fixing Fabaceae acquire nitrogen from the atmosphere. Methods: Upper-canopy δ15NF values were determined for 1255 trees sampled across 65 Amazon forest plots. Along with plot inventory data, differences in δ15NF between nodule-forming Fabaceae and other trees were used to estimate the extent of N2 fixation. Results: δ15NF ranged from -12.1‰ to +9.3‰. Most of this variation was attributable to site-specific conditions, with extractable soil phosphorus and dry-season precipitation having strong influences, suggesting a restricted availability of nitrogen on both young and old soils and/or at low precipitation. Fabaceae constituted fewer than 10% of the sampled trees, and only 36% were expressed fixers. We estimated an average Amazon forest symbiotic fixation rate of 3 kg N ha-1 year-1. Conclusion: Plant δ15N indicate that low levels of nitrogen availability are only likely to influence Amazon forest function on immature or old weathered soils and/or where dry-season precipitation is low. Most Fabaceae species that are capable of nodulating do not fix nitrogen in Amazonia. © 2014 Copyright 2013 Botanical Society of Scotland and Taylor & Francis. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 7, Número 1-2, Pags. 173-187 | pt_BR |
dc.rights | Restrito | * |
dc.title | Basin-wide variations in Amazon forest nitrogen-cycling characteristics as inferred from plant and soil 15N:14N measurements | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1080/17550874.2013.807524 | - |
dc.publisher.journal | Plant Ecology and Diversity | pt_BR |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Não existem arquivos associados a este item.
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.