Nitrogen availability patterns in white-sand vegetations of central brazilian amazon
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...
| Autor principal: | Mardegan, Sílvia Fernanda |
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| Outros Autores: | Nardoto, G. B., Higuchi, Niro, Moreira, Marcelo Z., Martinelli, Luiz Antônio |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Trees - Structure and Function
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18430 |
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oai:repositorio:1-18430 |
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oai:repositorio:1-18430 Nitrogen availability patterns in white-sand vegetations of central brazilian amazon Mardegan, Sílvia Fernanda Nardoto, G. B. Higuchi, Niro Moreira, Marcelo Z. Martinelli, Luiz Antônio Campina Campinarana Nitrogen Availability Nitrogen Stable Isotopes White-sand Vegetation Concentration (process) Forestry Isotopes Nitrogen Sand Soils Vegetation Concentration Ecosystems Forestry Isotopes Nitrogen Plants Sand Soil Aldina Heterophylla 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. 2020-06-15T21:54:56Z 2020-06-15T21:54:56Z 2009 Artigo https://repositorio.inpa.gov.br/handle/1/18430 10.1007/s00468-008-0293-9 en Volume 23, Número 3, Pags. 479-488 Restrito Trees - Structure and Function |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Campina Campinarana Nitrogen Availability Nitrogen Stable Isotopes White-sand Vegetation Concentration (process) Forestry Isotopes Nitrogen Sand Soils Vegetation Concentration Ecosystems Forestry Isotopes Nitrogen Plants Sand Soil Aldina Heterophylla |
| spellingShingle |
Campina Campinarana Nitrogen Availability Nitrogen Stable Isotopes White-sand Vegetation Concentration (process) Forestry Isotopes Nitrogen Sand Soils Vegetation Concentration Ecosystems Forestry Isotopes Nitrogen Plants Sand Soil Aldina Heterophylla Mardegan, Sílvia Fernanda Nitrogen availability patterns in white-sand vegetations of central brazilian amazon |
| topic_facet |
Campina Campinarana Nitrogen Availability Nitrogen Stable Isotopes White-sand Vegetation Concentration (process) Forestry Isotopes Nitrogen Sand Soils Vegetation Concentration Ecosystems Forestry Isotopes Nitrogen Plants Sand Soil Aldina Heterophylla |
| description |
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. |
| format |
Artigo |
| author |
Mardegan, Sílvia Fernanda |
| author2 |
Nardoto, G. B. Higuchi, Niro Moreira, Marcelo Z. Martinelli, Luiz Antônio |
| author2Str |
Nardoto, G. B. Higuchi, Niro Moreira, Marcelo Z. Martinelli, Luiz Antônio |
| title |
Nitrogen availability patterns in white-sand vegetations of central brazilian amazon |
| title_short |
Nitrogen availability patterns in white-sand vegetations of central brazilian amazon |
| title_full |
Nitrogen availability patterns in white-sand vegetations of central brazilian amazon |
| title_fullStr |
Nitrogen availability patterns in white-sand vegetations of central brazilian amazon |
| title_full_unstemmed |
Nitrogen availability patterns in white-sand vegetations of central brazilian amazon |
| title_sort |
nitrogen availability patterns in white-sand vegetations of central brazilian amazon |
| publisher |
Trees - Structure and Function |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18430 |
| _version_ |
1787142110532599808 |
| score |
11.755432 |