Ekologické zvláštnosti pozorované u dvou druhů Caloplaca v pohoří Bükk v Maďarsku

Species of Caloplaca appear to be strongly substrate specific in general. Caloplaca monacensis (related to C. cerina) and C. pyracea (related to C. holocarpa) are not exceptions both are epiphytic species with rather restricted niches. The former is termophilous and baziphilous occurring in central and southern Europe, but the later occurs on nitrogen-rich barks throughout Europe. Possessing different ecology, both species can hardly grow side by side, however, we observed them together in rich populations on cherty limestone in the Bükk Mts. A specific SiO2 addition in the limestone rocks harbouring these species may explain this ecological abnormality. Identification of both species was confirmed by ITS nrDNA molecular data.