1. Laboratory of Ecology, Institute of Dendrology, Polish Academy of Sciences; Kórnik Poland
2. Faculty of Forestry, Department of Game Management and Forest Protection; Poznań University of Life Sciences; Poznań Poland
3. Faculty of Biology, Department of Systematic Zoology; Adam Mickiewicz University; Poznań Poland
4. Department of Botany and Ecology, Faculty of Biological Sciences; University of Zielona Góra; Zielona Góra Poland