1. CSIC; Global Ecology Unit CREAF-CEAB-CSIC-UAB; 08913 Cerdanyola del Vallès Catalonia Spain
2. CREAF; 08913 Cerdanyola del Vallès Catalonia Spain
3. UA; Antwerpen Belgium
4. Ecotoxicology of Air Pollution; CIEMAT; Avda Complutense 22 (edif. 70) Madrid 28040 Spain
5. Freie Universität Berlin; Institut für Biologie; Altensteinstrasse 6 D-14195 Berlin Germany
6. Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB); D-14195 Berlin Germany
7. Thünen-Institute of Forest Ecosystems; Federal Research Institute for Rural Areas, Forestry and Fisheries; Alfred-Moeller-Strasse 1 16225 Eberswalde Germany
8. Institute for Botany and Landscape Ecology; University Greifswald; Grimmer Strasse 88 17487 Greifswald Germany