Johan Varekamp, the Harold T. Stearns Professor in Earth Science, and Ellen Thomas, research professor of earth and environmental sciences, presented papers at the Estuaries and Coasts in a Changing World conference of the Coastal and Estuarine Research Federation in Portland, Ore. Nov. 1-5. Their talks were titled "Proxies for Eutrophication in Long Island Sound" and " Hypoxia in Long Island Sound - Since When and Why."