Keynote Speakers Sally Hacker Oregon State University, Corvallis, OR, USA. Jonathan Jeschke Ludwig-Maximilians-Universität München, Munich, Germany. Hugh MacIsaac University of Windsor, ON, Canada.     Ronaldo Sousa Universidade do Minho, Braga, Portugal. David Strayer Cary Institute of Ecosystem Studies, Millbrook, NY, USA. Diego Vázquez Universidad Nacional del Cuyo, Mendoza, Argentina. CANCELLED