1. Department of Geological SciencesUniversity of Florida Gainesville FL USA
2. Now at Department of Earth, Ocean, and Atmospheric SciencesFlorida State University Tallahassee FL USA
3. Now at Geochemical and Environmental Research GroupTexas A&M University College Station TX USA
4. Land Use and Environmental Change InstituteUniversity of Florida Gainesville FL USA
5. Whitney Laboratory for Marine BioscienceUniversity of Florida St. Augustine FL USA
6. Department of Soil and Water SciencesUniversity of Florida Gainesville FL USA