Challenges for biodiversity research in Europe by De Meester, L, Van Tienderen, P, Werger, M, Hector, A, Wörheide, G, Niemelä, J, Aguilar, A, Smets, E, Godfray, C, Sutherland, W, Bauhus, J, Courchamp, F, Gandini, G, Koch, M, Le Maho, Y, Manuel, M, Pawlowski, J, Quéinnec, E, Owens, I, Keustermans, L