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- Title
PESTICIDE ACCUMULATION RATES IN A MANAGED MARSH ALONG LAKE ERIE.
- Authors
Spongberg, Alison L.; Gottgens, Johan F.; Muller, Barry E.
- Abstract
Cores from two marshes along the southern shore of Lake Erie were 210Pb age-dated and analyzed for persistent pesticide pollutants using column chromatographic separation and analysis with gas chromatography. Soils in both watersheds have low to very low permeability and are dominated by a very poorly drained silty clay. Land-use practices in the watersheds of either marsh changed little since 1950; however, both watersheds are marked by decreased area dedicated to orchards and concurrent increase in residential and road area. The increase in grain size in recent years may be associated with a period of high water in Lake Erie since the early 1970s. The pesticide accumulation rates were calculated and indicate an airborne source for HCHs and endrin and possibly current illegal usage of DDT. The ratio of metabolite to parent molecule did not appear to change with sediment age. Also, there appeared to be a delay between pesticide application and deposition in the marshes.
- Subjects
LAKE Erie; PESTICIDES &; wildlife; PESTICIDE pollution; PERSISTENT pollutants; POLLUTANTS; PESTICIDE toxicology; WATERSHEDS
- Publication
Water, Air & Soil Pollution, 2004, Vol 152, Issue 1-4, p387
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/B:WATE.0000015370.62419.14