Affiliation: | 1. Department of Natural Forests, Forest Research Institute, Park Dyrekcyjny 6, 17-230 Białowieża, Poland;2. Natural Resources Institute Finland (Luke), Yliopistokatu 6B, FI-80100 Joensuu, Finland;3. Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, 00-679 Warsaw, Poland |