Jodi Switzer Blum1, Allana Burns Bindi1, J. Buzzelli2, John F. Stolz2, Ronald S. Oremland1
1US Geological Survey, ms 480, 345 Middlefield Road, Menlo Park, CA 94025, USA e-mail: [email protected] Tel. +1-650-329-4482; Fax +1-650-329-4463, , US 2Department of Biological Sciences, Duquesne University, Pittsburg, PA 15282, USA, US