Nitrógeno, fósforo y cociente C/N en los sedimentos superficiales de la laguna de Chacopata, Sucre, Venezuela / Nitrogen, phosphorus and the C/N ratio in superficial sediments of Chacopata lagoon from Sucre, Venezuela
Rev. biol. trop
; 48(Supl.1): 261-268, dic. 2000.
Article
em Es
| LILACS
| ID: lil-503254
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BR1.1
ABSTRACT
The basal behaviour and relationship with organic carbon (Corg) content and prevailing granulometric fractions, of organic nitrogen (Norg), total phosphorus (P-total) and C/N ratio in surface sediments of Chacopata lagoon, Sucre State, Venezuela, were studied. Concentrations and spatial gradients were determined in sixteen stations following a common method for marine sediments. Norg concentrations varied between 0.102 and 0.510% (x = 0.237%), total phosphorus between 0.012 and 0.094% (x = 0.058%) and C/N ratio between 9.27 and 44.47 (x = 20.53). The higher contents of Norg and total phosphorus are from sections with an abundance of mangroves, marine phanerogams, macroalgae, benthonic biomass and migratory birds shelters. The C/N ratio shows the typical values for carbonated sediments, indicating that the nitrogenous compounds are rapidly degraded and the organic matter presents itself as humic substances. This parameter was moderately associated with silt and clay, and showed antagonism with sand, whereas Norg and phosphorus showed no correlation with them. The organic contribution is purely autochthonous no anthropogenous contributions were found.
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Índice:
LILACS
Assunto principal:
Compostos Orgânicos
/
Fósforo
/
Carbono
/
Sedimentos Geológicos
/
Água Doce
/
Nitrogênio
País/Região como assunto:
America do sul
/
Venezuela
Idioma:
Es
Revista:
Rev. biol. trop
Assunto da revista:
BIOLOGIA
/
MEDICINA TROPICAL
Ano de publicação:
2000
Tipo de documento:
Article