||Calculated Contribution of Surface Microlayer PCB to Contamination of Lake Michigan Lake Trout.
Connolly, J. P. ;
Thomann, R. V. ;
||Manhattan Coll., Bronx, NY. Environmental Engineering and Science Program.;Environmental Research Lab.-Duluth, MN.
Lake Michigan ;
Polychlorinated biphenyls ;
Water pollution effects(Animals)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
The possible significance of PCB concentration in the surface microlayer of Lake Michigan to contamination of lake trout was examined using a modification of a previously developed food chain model. Vertically migrating zooplankton were assumed to spend a fraction of each day exposed to a surface microlayer with dissolved and phytoplankton PCB concentrations at values that resulted in an average exposure concentration 2.1 times greater than subsurface levels. Considering a worst case scenario, the model indicated that approximately 12% (3 micrograms/g) of the PCB concentration in adult lake trout could be contributed from the microlayer.