Lišejníky NPR Drbákov-Albertovy skály ve středním Povltaví

Drbákov-Albertovy skály National Nature Reserve (61,03 ha; 270– 474 m a.s.l.) represents one of the most prominent natural sites of the Middle Vltava region, well known for its diverse geology, vegetation and high conservation value. Key habitats include extensive rocks locally enriched with calcium or iron, formerly coppiced scree forests with Taxus baccata, and small heathlands. Despite the absence of historical records, the lichens of the area have been studied relatively intensively during the past two decades, with several important finds published, including taxa new to the Czech Republic and even species described as new to science. In this study, I summarise the results of twelve field excursions carried out between 2020 and 2025, complemented with data from earlier surveys. Altogether, 260 lichen taxa, five lichenicolous fungi and eight non-lichenised fungi traditionally studied by lichenologists have recently been recorded, of which 42 species (~16%) are red-listed in the Czech Republic. Combined with previous data, the total number of lichens known from the reserve reaches 295 taxa. Saxicolous lichens clearly dominate (147 species), followed by epiphytes, terricolous and lignicolous taxa. Peccania corallina, Verrucaria bulgarica, and Xanthoparmelia perrugata are published here as new to the Czech Republic. A few other recorded species (from genera Chaenotheca sp., Sagedia sp., and Verrucaria sp.) are potentially undescribed. Absconditella trivialis, Arthonia atra, A. granitophila, A. thoriana, Catillaria atomarioides, Diploschistes euganeus, Lecidea fuscoatrina, L. sarcogynoides, Pyrenula nitidella, Rhizocarpon oederi, R. simillimum, Rimularia insularis, Rinodina moziana, Rufoplaca griseomarginata, and Sparria endlicheri represent other remarkable records. DNA barcoding (ITS, mtSSU) was applied to verify the identity of 23 specimens. The results underline the exceptional importance of Drbákov-Albertovy skály for lichen diversity in Central Bohemia and contribute to a better understanding of the distribution of several rare and taxonomically critical lichens in the Czech Republic.