Jens Kattge, Max Planck Institute for Biogeochemistry, Jena, Germany, Gerhard W Boenisch, MPI Biogeochemie, Jena, Germany, Sandra Díaz, Universidad Nacionalde Córdoba, Instituto Multidisciplinario de Biología Vegetal, Córdoba, Argentina, Sandra Lavorel, Laboratoire d’Ecologie Alpine (LECA), CNRS, Grenoble, France, Iain Colin Prentice, Imperial College London, London, United Kingdom, Paul Leadley, University of Paris-Sud 11, Orsay, France, Christian Wirth, University of Leipzig, Leipzig, Germany and TRY Consortium