Wątrobowce jako wskaźniki sukcesji odtwarzającej siedliska borealnych świerczyn bagiennych w Dolinie Czarnej Hańczy (Wigierski Park Narodowy)

The research problem discussed in the paper concerns the reaction of cryptogams (liverworts) to changes in the habitat and microclimate of the forest interior, which occur in the successive sequence closing the return of the forest to the former grassland (meadow or pasture) in the river valley. The study was conducted on two groups of habitats and groups of species occurring in them, i.e. epigeic and epixylic liverworts. The research results showed that when forests returned to former grassland (meadow or pasture), the soil habitat regenerated faster. The recreation of epixylic flora is a long process.