1. Climate Change Institute, University of Maine, Orono, ME 04469, USA.
2. School of Biology and Ecology, University of Maine, Orono, ME 04469, USA.
3. Department of Anthropology, Adelphi University, Garden City, NY 11530-0701, USA.
4. Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, USA.
5. School of Earth and Climate Sciences, University of Maine, Orono, ME 04469, USA.
6. Department of Anthropology, University of Maine, Orono, ME 04469, USA.
7. Department of Earth System Science, University of California-Irvine, Irvine, CA 92697, USA.
8. South Atlantic Environmental Research Institute, Stanley, Falkland Islands.
9. School of Biological Sciences (Zoology), University of Aberdeen, Aberdeen AB24 2TZ, UK.
10. Department of Geology, University of Cincinnati, Cincinnati, OH 45221, USA.