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LIMNOLOGY OF MICHIGAN'S NEARSHORE WATERS OF LAKES SUPERIOR AND HURON
Citation:
Basch, R., C. Pecor, R. Waybrant, AND D. Kenaga. LIMNOLOGY OF MICHIGAN'S NEARSHORE WATERS OF LAKES SUPERIOR AND HURON. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-80/059.
Description:
Limnological assessments, including water and sediment chemistry, bacterial densities, zoo- and phyto-plankton and benthic macroinvertebrate community structure, and fish contaminants, were performed at 24 locations in Michigan's nearshore waters of Lakes Superior and Huron in 1974 and 1975. The nearshore waters of Lake Superior were all oligotrophic with generally high water quality as reflected by consistently high dissolved oxygen, reactive silica and nitrate, and low phosphorus, total dissolved solids (TDS), chlorophyll a and bacterial densities. A statistical trend analysis based on 1974 through 1976 (GLECS) data indicated significant increases in the concentrations of dieldrin, DDT and mercury in Lake Superior lake trout. These same data show no statistical changes in PCB concentrations from 1974 to 1976.