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...
| Authors: | , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2012 |
| Country: | Brasil |
| Institution: | Universidade Federal de Pelotas (UFPEL) |
| Repository: | Repositório Institucional da UFPel - Guaiaca |
| Language: | Portuguese |
| OAI Identifier: | oai:guaiaca.ufpel.edu.br:prefix/10364 |
| Online Access: | http://guaiaca.ufpel.edu.br/xmlui/handle/prefix/10364 |
| Access Level: | Open access |
| Keyword: | Nutrients Coastal lagoons Submarine groundwater discharge |
| Summary: | 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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