Affiliation: | U.S. Geological Survey, 2045 Route 112, Coram, NY 11727. E-mail:;Department of Microbiology, Southern Illinois University, Carbondale, IL 62901.;Department of Geosciences, SUNY-Stony Brook, Stony Brook, NY 11790.;Long Island Groundwater Research Institute, SUNY-Stony Brook, Stony Brook, NY 11790. |