Nitrogen dynamics in subtropical fringe and basin mangrove forests inferred from stable isotopes.
Oecologia
; 183(3): 841-848, 2017 03.
Article
em En
| MEDLINE
| ID: mdl-27913865
Mangroves exhibit low species richness compared to other tropical forests, but great structural and functional diversity. Aiming to contribute to a better understanding of the functioning of mangrove forests, we investigated nitrogen (N) dynamics in two physiographic types of mangroves (fringe and basin forests) in southeastern Brazil. Because fringe forests are under great influence of tidal flushing we hypothesized that these forests would exhibit higher N cycling rates in sediment and higher N losses to the atmosphere compared to basin forests. We quantified net N mineralization and nitrification rates in sediment and natural abundance of N stable isotopes (δ15N) in the sediment-plant-litter system. The fringe forest exhibited higher net N mineralization rates and δ15N in the sediment-plant-litter system, but net nitrification rates were similar to those of the basin forest. The results of the present study suggest that fringe forests exhibit higher N availability and N cycling in sediment compared to basin forests.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Áreas Alagadas
/
Nitrogênio
Idioma:
En
Revista:
Oecologia
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Alemanha