| Abstract: | We quantified total mercury in surficial sediments (uppermost 5 cm) of six small seepage lakes. Fifty cores were taken from each lake, based on a random sampling design stratified by water depth. Volumetric concentrations (mass per volume of wet sediment) more accurately portrayed the depth distribution of mercury in the lakes than did dry-weight concentrations, which underrepresented the significance of the shallow-water sediments as a reservoir of potentially available mercury. Estimates of whole-lake burdens (masses) of mercury in the surficial sediment, which represents the maximum amount of sedimentary mercury available for methylation, ranged from 45 to 149 g. We hypothesize that the observed variation in areal burdens of mercury was partly due to variation among lakes in the pH-related efflux of gaseous mercury (Hg super(0)) from the lakes to the atmosphere. |
| Genre: | Article |
| ProdID: | 1003171 |
| Citation Author: | Rada, R. G.; Powell, D. E.; Wiener, J. G. |
| Citation Contributing Office: | Upper Midwest Environmental Sciences Center |
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| Citation End Page: | 873 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Fisheries and Aquatic Sciences |
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| Citation Number Of Pages: | 9 |
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| Citation Phsyical Description: | pp. 865-873 |
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| Citation Publisher: | University of Wisconsin River Studies Center |
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| Citation Search Results Text: | Whole-lake burdens and spatial distribution of mercury in surficial sediments in Wisconsin seepage lakes; 1993; Article; Journal; Canadian Journal of Fisheries and Aquatic Sciences; Rada, R. G.; Powell, D. E.; Wiener, J. G. |
| Citation Start Page: | 865 |
| Citation Volume: | 50 |
| Citation Year: | 1993 |
| Type: | citation/reference |
| Text: | Whole-lake burdens and spatial distribution of mercury in surficial sediments in Wisconsin seepage lakes; 1993; Article; Journal; Canadian Journal of Fisheries and Aquatic Sciences; Rada, R. G.; Powell, D. E.; Wiener, J. G. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1993 00:00 -0600 |
| Publisher: | University of Wisconsin River Studies Center |
