Use este identificador para citar ou linkar para este item:
https://repositorio.inpa.gov.br/handle/1/18430
Registro completo de metadados
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Mardegan, Sílvia Fernanda | - |
dc.contributor.author | Nardoto, G. B. | - |
dc.contributor.author | Higuchi, Niro | - |
dc.contributor.author | Moreira, Marcelo Z. | - |
dc.contributor.author | Martinelli, Luiz Antônio | - |
dc.date.accessioned | 2020-06-15T21:54:56Z | - |
dc.date.available | 2020-06-15T21:54:56Z | - |
dc.date.issued | 2009 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/18430 | - |
dc.description.abstract | Addressing spatial variability in nitrogen (N) availability in the Central Brazilian Amazon, we hypothesized that N availability varies among white-sand vegetation types (campina and campinarana) and lowland tropical forests (dense terra-firme forests) in the Central Brazilian Amazon, under the same climate conditions. Accordingly, we measured soil and foliar N concentration and N isotope ratios (δ15N) throughout the campina-campinarana transect and compared to published dense terra-firme forest results. There were no differences between white-sand vegetation types in regard to soil N concentration, C:N ratio and δ15N across the transect. Both white-sand vegetation types showed very low foliar N concentrations and elevated foliar C:N ratios, and no significant difference between site types was observed. Foliar δ15N was depleted, varying from -9.6 to 1.6‰ in the white-sand vegetations. The legume Aldina heterophylla had the highest average δ15N values (-1.5‰) as well as the highest foliar N concentration (2.1%) while the non-legume species had more depleted δ15N values and the average foliar N concentrations varied from 0.9 to 1.5% among them. Despite the high variation in foliar δ15N among plants, a significant and gradual 15N-enrichment in foliar isotopic signatures throughout the campina-campinarana transect was observed. Individual plants growing in the campinarana were significantly enriched in 15N compared to those in campina. In the white-sand N-limited ecosystems, the differentiation of N use seems to be a major cause of variations observed in foliar δ15N values throughout the campina-campinarana transect. © 2008 Springer-Verlag. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 23, Número 3, Pags. 479-488 | pt_BR |
dc.rights | Restrito | * |
dc.subject | Campina | en |
dc.subject | Campinarana | en |
dc.subject | Nitrogen Availability | en |
dc.subject | Nitrogen Stable Isotopes | en |
dc.subject | White-sand Vegetation | en |
dc.subject | Concentration (process) | en |
dc.subject | Forestry | en |
dc.subject | Isotopes | en |
dc.subject | Nitrogen | en |
dc.subject | Sand | en |
dc.subject | Soils | en |
dc.subject | Vegetation | en |
dc.subject | Concentration | en |
dc.subject | Ecosystems | en |
dc.subject | Forestry | en |
dc.subject | Isotopes | en |
dc.subject | Nitrogen | en |
dc.subject | Plants | en |
dc.subject | Sand | en |
dc.subject | Soil | en |
dc.subject | Aldina Heterophylla | en |
dc.title | Nitrogen availability patterns in white-sand vegetations of central brazilian amazon | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1007/s00468-008-0293-9 | - |
dc.publisher.journal | Trees - Structure and Function | 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.