Quimica nova | |
Nutrients fluxes from groundwater discharge into Mangueira Lagoon (Rio Grande do Sul, Brasil) | |
Santos, Isaac R.1  Milani, Idel C.2  Niencheski, Luis F. H.3  Milani, Marcio R.3  Andrade, Carlos F. F.3  Attisano, Karina K.3  | |
[1] Florida State University, Tallahassee, United States of America;Universidade Federal de Pelotas, Pelotas, Brasil;Universidade Federal do Rio Grande, Rio Grande, Brasil | |
关键词: nutrients; coastal lagoons; submarine groundwater discharge.; | |
DOI : 10.1590/S0100-40422012000100002 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
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.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO201902019640534ZK.pdf | 855KB | download |