1. Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland
2. Centre for Invasion Biology, Stellenbosch University, Stellenbosch, South Africa
3. Universidad de Concepción, Chile
4. Institute of Ecology and Biodiversity (IEB), Concepción, Chile
5. Instituto Argentino de Investigaciones de Zonas Áridas (IADIZA), Centro Científico Tecnológico (CCT) CONICET-Mendoza, Argentina