Laura Gemery¹, Harry J Dowsett², Lee W Cooper³, Thomas M Cronin² and Jacqueline M. Grebmeier⁴, (1)USGS Headquarters, Reston, VA, United States, (2)U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, VA, United States, (3)Univ Maryland, Solomons, MD, United States, (4)University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, Solomons, MD, United States