Ecological characteristic of the secondary pine forests in the Levocska kotlina basin

This contribution is dealing with the ecological characteristic of the the secondary pine forests in the Levoeska kotlina basin. Regarding to their lo ng-dated existence on this habitat they have a specific composition of the herb layer and therefore they were classified to the association Luzulo pil osaa-culti-Pinetum ass. nova hoc loco. They were given to syngenetic relati on with potential vegetation of this territory on the base of tenuos rests of the original (natural) forests. Changes in cover and biomass (above- bel owground and total) of the herb layer of this community are discussed.