1. U.S. Geological Survey/INSTAAR, Boulder, CO, USA
2. The Academy of Natural Sciences of Drexel University, Philadelphia, PA, USA
3. Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, USA
4. U.S. Environmental Protection Agency, Office of Research and Development, Center for Public Health and Environmental Assessment, Washington, DC, USA
5. Strange Attractor LLC, Boulder, CO, USA
6. Department of Palaeoanthropology, Senckenberg Research Institute, Frankfurt am Main, Germany
7. Department of Biology, St. Catherine University, St. Paul, MN, USA
8. Science Museum of Minnesota, St. Croix Watershed Res. Station, Marine on St. Croix, MN, USA