1Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, 62-035 Kórnik, Poland
2Wroclaw Division, Institute of Meteorology and Water Management, Parkowa 30, 51-616 Wrocław, Poland
3Department of Biology, University of Zielona Góra, Szafrana 1, 65-516 Zielona Góra, Poland
4Department of Botany, Kazimierz Wielki University, Ossolinski Avenue 12, 85-064 Bydgoszcz, Poland
Pol. J. Environ. Stud. 2011;20(1):45–52