Wpływ sztucznego odnawiania drzewostanów w borze mieszanym na skład zbiorowisk leśnych w Wigierskim Parku Narodowym

The paper presents the effect of artificial regeneration of stands with pine on a clear−cut area on the species composition of Calamagrostio−Piceetum association of reed−bed – spruce mixed coniferous stands frequently occurring in the Wigry National Park. The studies were carried out in two groups of pine stands: the old−growth stand at the age of 130−150 years, possibly established by way of natural regeneration and young−growth stands established by planting pine on clear−cut areas. Using traditional methods of phytosociological analysis no significant qualitative differences were found between the herbaceous vegetation of the both stands.