1. University of Wisconsin–Madison, Madison, Wisconsin, United States
2. Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota–Twin Cities, St. Paul, Minnesota, time of this work, and is now the invasive species grants and research coordinator for the Ecological and Water Resources Division of the Minnesota Department of Natural Resources, in St. Paul, Minnesota, United States
3. Redpath Museum and McGill School of Environment, McGill University, Montreal, Quebec, Canada, and is a research associate at the Centre for Invasion Biology at Stellenbosch University, Stellenbosch, South Africa