1. Department of Environmental Sciences, University of North Carolina Wilmington, Wilmington, NC, USA
2. Forest Resources and Environmental Conservation, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
3. Department of Parks, Recreation, and Tourism Management and Department of Forestry and Natural Resources, Clemson University, Clemson, SC, USA
4. North Cascades Institute, Sedro-Woolley, WA, USA