Jeff Mitton, professor and chair of CU-Â鶹ӰԺ's ecology and evolutionary biology department, is available to talk about the repercussions of oil spills. Mitton was on sabbatical in 1979-1980 at the Marine Biological Laboratory in Woods Hole, Mass., where he studied a 1969 oil spill that seeped into the Sippewissett Marsh.