Research interests focus on biogeochemical processes in aquatic systems, with special emphasis on the impacts of human activity on water quality and element cycles in lakes. Both field studies, including experimental manipulations in large systems, and modeling approaches are emphasized. Current activities focus on effects of acid deposition on chemical processes in lakes, rates of recovery of acidified lakes and the role of alkalinity-generating processes in this recovery, sources and bioaccumulation of mercury in lakes, and lake eutrophication and restoration.

B.A., Chemistry, Marquette, Iowa, 1963
M.S., Water Chemistry, University of Wisconsin-Madison, 1965
Ph.D., Water Chemistry, University of Wisconsin-Madison, 1968