vegetal associations edified by pinus sylvestris l. in neagra broŞtenilor hydrographic basin

The diversity of the natural habitats specific to Neagra Broşteni hydrographical basin have favoured installation of two different types of pine phytocoenoses. Although both of these plants communities are characteristic to acid substrata, one is specific to oligotrophic peat - bogs (Oxycocco – Sphagnetea) and the other to mountain versants presenting acidophilous soils and accentuated slopes (Vaccinio – Piceetea). These vegetal associations are presented in phytosociological tables and analysed in this paper from the bioforms, floristic elements and ecological requests perspectives.