Fred Beaulieu, beaulieuf@agr.gc.ca, Agriculture and Agri-Food Canada, 32 Main Street, Kentville, NS, Canada, David E. Walter, dewmite@shaw.ca, University of Alberta, Department of Biological Sciences, Edmonton, Alberta, Canada, Heather C. Proctor, University of Alberta, Department of Biological Sciences, 144 Earth Sciences Bldg, Edmonton, AB, Canada, and Roger Kitching, r.kitching@griffith.edu.au, Griffith University, School of Environmental Studies, 170 Kessels Road, Nathan, Queensland, Australia.