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Exotic Species, Migratory Birds, Sea Level Rise, Wetlands, And Contaminants...USGS Scientists Discuss Innovative Chesapeake Bay Restoration Studies

copper, lead, and zinc and for an acidic ash characteristic of sediment. Sediment samples also were analyzed for the same metals. The results suggest that comparative evaluation of sediment contamination levels and sediment ingestion accounts for virtually all of the lead ingested by mute swans. This finding suggests that this approach should be incorporated in ecosystem toxicological risk assessments of waterfowl. ("Relation of Lead Exposure to Sediment Ingestion in Mute Swans: A Chesapeake Bay Risk Assessment,"by W. Nelson Beyer, Daniel D. Day, Anna Morton, USGS, Laurel, Md., and Yakov Pachepsky, USDA, Beltsville, Md.)


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Contact: Bob Reynolds
rreynold@usgs.gov
703-648-6829
United States Geological Survey
8-Dec-1998


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