1. Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS), Petrozavodsk, Russia
2. Forest Research Institute of the Karelian Research Centre of the Russian Academy of Sciences (FRI KarRC RAS), Petrozavodsk, Russia
3. Pasvik State Reserve, Rajakoski, Russia
4. Institute of the Industrial Ecology Problems of the North of the Kola Science Center of the Russian Academy of Sciences (INEP KSC RAS), Apatity, Russia