1. Department
of Renewable Resources, University of Alberta, 348B South Academic Building, Edmonton, Alberta T6G 2H1, Canada
2. Department
of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, United Kingdom
3. Department
of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
4. Département
de Géographie, Université du Québec à Montréal Montréal, Québec H2V 2B8, Canada
5. Quality Radioanalytical
Support, LLC, 123 Cougar Trail, PO Box 774 Grand Marais, Minnesota 55604, United States
6. Department
of the Sciences of Agriculture, Food and Environment, University of Foggia, Via Napoli, 71122 Foggia, Italy