Program and Abstracts : 30th Conference on Great Lakes Research, May 11-14, 1987, the University of Michigan, Ann Arbor, Michigan ; Conference Hosts, the University of Michigan Great Lakes Research Division and Great Lakes Environmental Research Laboratory, National Oceanic and Atmospheric Administration in Cooperation with the University of Michigan Extension Service, Department of Conferences and Institutes ; Conference Co-chairs, Marlene S. Evans, Brian J. Eadie ; International Association for Great Lakes Research