My research is focused on characterizing how microbes influence the geochemistry and carbon and nutrient cycling in surface water, ground water and coastal marine water and associated sediment systems thru the application of phylogenetics, microbial energetics and stable isotopes and radiolabeled substrates.
Professional Experience
2004-present Microbial Ecologist, USGS Center for Coastal & Watershed Studies, St. Petersburg, FL
2002-present Affiliate Graduate Faculty in the University of South Florida’s Biology Department
2002-2009 Assistant Courtesy Professor in the University of South Florida’s College of Marine Sciences
2002-2004 USGS Mendenhall Fellow, Center for Coastal & Watershed Studies, St. Petersburg, FL
2001-2002 Microbial Ecologist, NASA, Astrobiology Institute for the Study of Biomarkers, Johnson Space Center, Houston
2000-2001 Research Microbiologist, Lockheed Martin, NASA Astrobiology Institute for Biomarkers, Johnson Space Center, Houston
1998-2000 Assistant Research Professor, Department of Microbiology, Montana State University
1996-1998 Post-doctoral research fellow at Montana State University/Dr. Gordon McFeters, Department of Microbiology
Education and Certifications
1996 Ph.D., University of South Florida, College of Public Health
1983 M.S., Eastern Kentucky University, Department of Biology
1978 B.S., Eastern Kentucky University, Department of Biology
Affiliations and Memberships*
Collaborating scientist (2005-2007). The influence on microbial activities on arsenic mobilization from Floridan aquifer material (Dr. John Arthur/FLDEP).
Collaborating scientist (2005-2007). Microbial chemotaxis in hydrocarbon contaminated aquifers (Dr. Ron Harvey/USGS NRP).
Collaborating scientist (2004-Present). Characterization of bacterial and bacteriophage dynamics in ice and selected glacial melt streams and permanently ice-covered lakes in the Antarctic Dry Valleys
Science and Products
Collaborative Science Provides Understanding of Contaminants in Bottled Water-an Increasingly Common Alternate Drinking Water Source
Science and Products
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- Science
Collaborative Science Provides Understanding of Contaminants in Bottled Water-an Increasingly Common Alternate Drinking Water Source
U.S. Geological Survey researchers and public health experts collaborated to determine what contaminants occur in bottled water, which is an increasingly common alternate drinking water source, to broaden their understanding of human exposure to contaminants in drinking water supply chains. Bottled water, like public-supply and private-well tap water supply chains, contained multiple organic...
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government