Keynote speakers Our keynote speakers will summarise the core issues associated with the three conference themes: Owen Lewis (Department of Zoology University of Oxford, UK) Christian Mulder (National Institute for Public Health and the Environment Laboratory for Ecological Risk, The Netherlands) Peter de Ruiter (Wageningen University and Research Centre, The Netherlands) Alastair Fitter (Department of Biology, University of York, UK) Richard J. Norby (Oak Ridge National Laboratory, TN, USA) Hans Pretzsch (Chair of Forest Growth and Yield, TU Munich) Andrew Hector (Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Switzerland) Mary Firestone (Department of Environmental Science, Policy, and Management, University of California, Berkeley, USA) Louise Jackson (Department of Land, Air and Water Resources, University of California, USA) Ivette Perfecto (School of Natural Resources and Environment, University of Michigan, USA ) Andreas Lüscher (Agroscope, Zurich, Switzerland) David Kleijn (Alterra, Centre for Ecosystem Studies, Wageningen, The Netherlands) Vojtech Novotny (Institute of Entomology, University of South Bohemia, Czech Republic) John Vandermeer (University of Michigan, USA)