Melting Glaciers: A Probable Source of DDT to the Antarctic Marine EcosystemEntry ID: ECA041
Abstract: This dataset compares data on DDT concentration of Adelie penguin (Pygoscelis adeliae) eggs and found that p,p'-DDE levels have not declined in the Palmer population of Adelie penguins in more than 30 years. In contrast, ΣDDT decreased significantly from 1975 to 2003 in Arctic seabird eggs. ∑DDT in the fat of Adelie penguins from Cape Crozier measured in 2006 was significantly higher than that ... measured about in 1960 . p,p'- DDT/p,p'-DDE ratios <1.0 for several Antarctic organisms, including Adelie penguin eggs, suggest contamination by old DDT. Indeed, the p,p'-DDT/p,p'-DDE ratio measured in Adelie penguins has significantly declined since 1964, indicating a predominance of old rather than new sources of ΣDDT in the Antarctic. Two independent measurements of ΣDDT indicate that 14 kg• y-1 ΣDDT is currently being released into the Antarctic marine environment due to glacier ablation.
Start Date: 2004-01-01Stop Date: 2006-12-30
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Geisz, H. N., Dickhut, R. M., Cochran, M. A., Fraser, W. R., and Ducklow, H. W., 2008: Melting glaciers: A probable source of DDT to the Antarctic marine ecosystem. Environmental Science & Technology, 42, 3958-3962.
Chiuchiolo, A. L.; Dickhut, R. M.; Cochran, M. A.; Ducklow, H. W., 2004. Persistent organic pollutants at the base of the Antarctic marine food web Environ. Sci. Technol., 38, 3551-3557.
Corsolini, S.; Covaci, A.; Ademollo, N.; Focardi, S.; Schepens, P., 2006.Occurrence of organochlorine pesticides (OCPs) and their enantiomeric signatures, and concentrations of polybrominanted diphenyl ether (PBDEs) in the Adlie penguin food web, Antarctica Environ. Pollut., 140, 371-382
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Creation and Review Dates
DIF Creation Date: 2010-06-25
Last DIF Revision Date: 2010-06-30