1. Graduate School of Geography, Clark University, Worcester, MA 01610, USA
2. Department of Geography, College of the Social Sciences, University of California, Los Angeles, CA 90095, USA
3. Department of Natural Resource Sciences, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
4. Clark Labs, Clark University, Worcester, MA 01610, USA
5. Bieler School of Environment, McGill University, Montréal, QC H3A 2A7, Canada