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, ?DDT 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 ?DDT in the Antarctic. Two independent measurements of ?DDT indicate that 14 kg? y-1 ?DDT 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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Data Set Progress
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: 2016-11-18