1. Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
2. Spatial Foodweb Ecology Group, Department of Agricultural Sciences, University of Helsinki, Helsinki, Finland.
3. Environmental and Marine Biology, Åbo Akademi University, Turku 20500, Finland.
4. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.
5. Institute of Biodiversity, Friedrich Schiller University, Jena, Germany.