Czeremcha amerykańska Prunus serotina Ehrh. na terenie Parku Krajobrazowego „Dolina Jezierzycy”

Mass introduction of black cherry Prunus serotina as a forest component in Europe, since the second half of the 1900s, resulted in negative changes in many thus enriched forest communities. The aim of our study was to record the distribution of P. serotina within the Jezierzyca Valley Landscape Park and to determine possible modifications in floristic composition that might be ascribed to the presence of this alien species. The analysis of plant communities in sample plots with and without P. serotina demonstrated a considerable destructive effect of this neophyte on the floristic composition over the area of the park. Furthermore, the incidence of the black cherry in the vicinity of riparian and alder sites may threaten these floristically valuable areas. In our opinion, such situation requires control.