1. Chesapeake Biological Laboratory, Center for Environmental and Estuarine Studies, and Department of Microbiology, University of Maryland, Solomons 20688-0038
2. Chesapeake Biological Laboratory, Center for Environmental and Estuarine Studies, and Department of Chemistry, University of Maryland, Solomons
3. Chesapeake Biological Laboratory, Center for Environmental and Estuarine Studies, and Department of Microbiology, University of Maryland, Solomons