Responses of forest ecosystems in Europe to decreasing nitrogen deposition - Schmitz, Andreas (University of Göttingen. Department Silviculture and Forest Ecology of the Temperate Zones) ; Sanders, Tanja G. M. (Thünen Institute of Forest Ecosystems) ; Bolte, Andreas (Thünen Institute of Forest Ecosystems) ; Bussotti, Filippo (University of Florence. Department of Agrifood Production and Environmental Sciences) ; Dirnböck, Thomas (Environment Agency Austria. Department for Ecosystem Research and Environmental Information Management) ; Johnson, Jim (University College Dublin. School of Agriculture and Food Science) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Pollastrini, Martina (University of Florence. Department of Agrifood Production and Environmental Sciences) ; Prescher, Anne-Katrin (Thünen Institute of Forest Ecosystems) ; Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Verstraeten, Arne (Research Institute for Nature and Forest (Brusel·les, Bèlgica)) ; Vries, Wim de (Wageningen University and Research, Environmental Research (the Netherlands))