Data/hora: 13/06/2024 00:55:58

Provedor de dados: | 52
País: | Brazil
Título: | Dissolved Nitrogen and Phosphorus Dynamics in the Lower Portion of the Paraiba do Sul River, Campos dos Goytacazes, RJ, Brazil
Autores: | Silva,Mônica Aparecida Leite; Calasans,Claudia Ferreira; Ovalle,Alvaro Ramon Coelho; Rezende,Carlos Eduardo.
Data: | 2001-12-01
Ano: | 2001
Palavras-chave: | Dissolved nutrients; Paraíba do Sul River; Temporal dynamics; Nitrogen; Phosphorus; Discharge.
Resumo: | The Paraíba do Sul river lower reach was monitored monthly between August 1995 and July 1996. This study was aimed at evaluating the temporal dynamics of dissolved nitrogen and phosphorus and its main controlling factors. Minimum and maximum observed values were as follows: N-NO2- - 0.08/0.51; N-NO3- - 21/57; N-NH4+ - 1.4/6.7; DON - 4.9/86.0; DIN -24.5/60.9; P-PO4(3-) - 0.43/1.66; DOP - 0.05/0.92; pH - 6.2/7.8; Dissolved Oxygen - 6.4/10.1; Conductivity - 48/74; Temperature - 20.5/31.1 (Nutrients - µM; Dissolved Oxygen - mg/l; Conductivity - µS/cm; Temperature - °C). Discharge presented a characteristic seasonal variation, showing a peak in January. Increasing P-PO4(3-), DOP, N-NH4+ and N-NO2- concentrations with increasing discharges could be associated to the partial flooding of inumerous fluvial islands and floodplains and to the agricultural practices of sugar cane crops that during the wet season could transfer nitrogen and phosphorus compounds to the fluvial channel.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000400006
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132001000400006
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.44 n.4 2001
Fonte: | info:eu-repo/semantics/openAccess