Fluxos de nutrientes associados às descargas de água subterrânea para a Lagoa Mangueira (Rio Grande do Sul, Brasil)
This study assesses the importance of groundwater discharge to dissolved nutrient levels in Mangueira Lagoon. A transect of an irrigation canal in the margin of Lagoon demonstrated a strong geochemical gradient due to high groundwater inputs in this area. Using 222Rn as a quantitative groundwater tr...
| Autores: | , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | Brasil |
| Recursos: | Universidade Federal de Pelotas (UFPEL) |
| Repositorio: | Repositório Institucional da UFPel - Guaiaca |
| Idioma: | portugués |
| OAI Identifier: | oai:guaiaca.ufpel.edu.br:prefix/10364 |
| Acesso em linha: | http://guaiaca.ufpel.edu.br/xmlui/handle/prefix/10364 |
| Access Level: | acceso abierto |
| Palavra-chave: | Nutrients Coastal lagoons Submarine groundwater discharge |
| Resumo: | This study assesses the importance of groundwater discharge to dissolved nutrient levels in Mangueira Lagoon. A transect of an irrigation canal in the margin of Lagoon demonstrated a strong geochemical gradient due to high groundwater inputs in this area. Using 222Rn as a quantitative groundwater tracer, we observed that the flux of dissolved inorganic nitrogen (DIN), silicate and phosphate (1178 and 1977; 26190 and 35652; 167 and 188 mol d-1 for winter and summer, respectively) can continually supply/ sustain primary production. The irrigation canals act as an artificial underground tributary and represent a new source of nutrients to coastal lagoons. |
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