Abstract
The environmental effects of sediments upon water quality and the aquatic ecosystem are currently being investigated by bulk sediment analysis or elutriate procedures, with neither procedure being totally adequate. Using a sediment bioassay procedure developed at the Central Regional Laboratory, U.S. EPA, Region V by Prater and Anderson (1977), sediment bioassays were conducted on eight sediments collected from Duluth and Superior Harbors in July of 1976. The stations were chosen to reflect areas that were suspected to be heavily polluted, moderately polluted, and nonpolluted. In addition, a correlation was drawn between the percent mortality of biological test organisms and the bulk sediment chemistry data collected by Bowden (1976).
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