SS3.04 Biogeochemistry of DOC/DON in a Watershed Context
Date: Wednesday, June 12, 2002
Location: Poster Session - VCC
 
KelleyCA, University of Missouri, Columbia, USA, kelleyc@missouri.edu
Wicks, C, M, University of Missouri, Columbia, USA, wicksc@missouri.edu
Peterson, E, W, University of Missouri, Columbia, USA, ewp4bb@mizzou.edu
Nbuka, C, I, University of Missouri, Columbia, USA, cin8d1@mizzou.edu
Lerch, R, , USDA-ARS, Columbia, USA, lerchr@missouri.edu
 
MASS FLUX OF NATURAL ESTROGEN THROUGH A KARST SPRING SYSTEM
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Natural estrogen (17-B estradiol) concentrations and particulate organic carbon (POC) were measured directly downstream from the spring at Devilís Ice Box, MO from April 2000 to April 2001. Estrogen concentrations were determined using an ELISA kit and ranged from 14 to 68 ng/L. The estrogen concentration was inversely correlated with % POC. In addition, hourly samples of estrogen, both upstream and downstream from the spring, were also obtained for two time periods. These data suggest that the predominant source of estrogen is the losing stream. Water discharge at the spring was also continually monitored. From these data, mass fluxes of estrogen were determined to assess dosage of the estrogen to indigenous populations.