Abstract
92 lichen taxa were recorded within the course of the lichen biodiversity survey in the Čertoryje National Nature Reserve in the White Carpathians Mts in 2012. The most important records are epiphytes Acrocordia gemmata, Arthonia helvola, Bacidia subincompta, Flavoparmelia caperata, Hyperphyscia adglutinata, and Ramonia chrysophaea.
All these species are very rare in the reserve. The lichenicolous fungus Dactylospora microspora is new to the Czech Republic and it is firstly known from thallus of Agonimia allobata.
Majority of recorded lichens were observed on solitary oaks, which are common throughout the reserve. We have observed an interesting process of colonization of lichen and moss communities on oaks.
We suppose that most of trees were nearly without epiphytic flora about 20 years ago because of acid rains and air pollution. Nowadays, number of oaks is covered by a single dominant lichen species.
It may be explained by fast local distribution of one or few lichen species in habitats without competition pressure of other lichens. We cannot exclude recent lichen colonization from outside the territory, but the recent expansion of autochthonous lichens is perhaps more probable.