Protected area of old-growth beech forest “Uholka–Shyrokyi Luh” surveyed by Dymytrova et al.  by a systematic sampling on circular plots of 500 m2 (black dots). The area is divided into a southern part, Uholka, and the northern one, Shyrokyi Luh. We surveyed only a part of Uholka, the valley of the brook Velyka Uholka (area in grey) where we selected four plots (black squares) in hot-spots of lichen diversity. Forest habitat diversity is distinctly greater at lower altitude, in the area with limestone bedrock (below the dotted line).