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Great Lakes Trends Analysis

The Office of the Great Lakes, Michigan Department of Environmental Quality, has made it's publication "Great Lakes Trends: A Dynamic Ecosystem" available in electronic format on its Internet HomePage.  The report reviews such trends as PCB levels in coho salmon and Herring Gull eggs; annual phosphorus loadings from the Detroit River; lead and mercury in Lake Michigan sediments; atmospheric deposition; land use changes; and the introduction of exotic species.
The document must be viewed in Adobe Acrobat, which can be downloaded free of charge at the site: