1. National High Magnetic Field Laboratory Geochemistry Group and Department of Earth, Ocean, and Atmospheric Science Florida State University Tallahassee FL USA
2. Now at: Department of Biological Sciences University of Lethbridge Lethbridge AB Canada
3. Division of Math & Science, Babson College and Department of Earth and Environment Boston University Boston MA USA
4. Now at: Department of Chemistry Pontchartrain Institute for Environmental Sciences, Shea Penland Coastal Education & Research Facility, Chemical Analysis & Mass Spectrometry Facility, University of New Orleans New Orleans LA USA
5. Department of Biology Boston University Boston MA USA
6. Now at: Yale School of the Environment Yale University New Haven CT USA