Stony Brook Southampton continues its Marine Science talks with “Mapping Bottom Habitats of Eastern Long Island’s Estuaries” on Friday, April 4, at 7:30 p.m. in Duke Lecture Hall.?The talk will be presented by Roger D. Flood and Robert M. Cerrato, professors at Stony Brook University’s School of Marine and Atmospheric Sciences.?Professor Flood earned his doctorate from Massachusetts Institute of Technology/Woods Hole Oceanographic Institution. His current research includes sedimentation patterns in modern environments, including the Great Lakes, the Hudson River and local estuaries, research that is important for understanding marine and freshwater environmental problems.?Professor Cerrato earned his doctorate from Yale. His research has noted how the decline of large suspension feeding bivalves such as the hard clam in Long Island bays has affected plankton populations and contributed to the toxic Brown Tide. His work suggests that recovery may not occur unless suspension feeding bivalve stocks are replenished.?The event is free and open to the public with a reception to follow. For more information, call 283-4020.