1. Department of Environmental Sciences Université du Québec à Trois-Rivières, 3351 boul. des Forges, C.P. 500, Trois-Rivières, Quebec G9A 5H7, Canada
2. Center for Northern Studies, Université Laval, 2405 rue de la Terrasse, Québec G1V 0A6, Canada
3. Environmental Archaeology and Materials Science National Museum of Denmark, Frederiksholms Kanal 12, DK-1220 Copenhagen, Denmark
4. Department of Bioscience Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark
5. Arctic Research Centre, Aarhus University, C.F. Møllers Allé 8, DK-8000 Aarhus C, Denmark