1. Department of Renewable Resources University of Alberta Edmonton Alberta Canada
2. Department of Ecology, Evolution and Environment La Trobe University Bundoora Victoria Australia
3. Zhejiang Tiantong Forest Ecosystem National Observation and Research Station School of Ecological and Environmental Sciences East China Normal University Shanghai China
4. Centre for Invasion Biology Department of Mathematical Sciences Stellenbosch University Matieland South Africa
5. Biodiversity Informatics Unit African Institute for Mathematical Sciences Cape Town South Africa