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This paper is the first report on Cladonia species from Ardahan, a north-eastern province of Turkey. A circumpolar boreal-low arctic species, Cladonia acuminata, rarely reported from Asia, and the recently described Cladonia monomorpha are reported as new for Turkey. Their detailed descriptions and taxonomical remarks are provided. Localities of other ascertained Cladonia species in the province supplement the knowledge of their distribution patterns in the country. In addition, the typically corticolous/lignicolous species Vulpicida pinastri is mentioned as also growing on primary squamules and podetia of C. pyxidata

This study was carried out in the province of Artvin, district of Murgul. A total of 94 species in 41 genera belonging to Ascomycetes were found, two of which are varieties and three are subspecies. Eight of these species are new records for Turkey.

Radioactivity levels in lichens collected from Akçaabat and Çamlihemşin in the Eastern Black Sea region of Turkey were investigated. Radioactive pollution was detected in all samples and varied with species, area and location. The highest concentrations of Cs-137 were found in Parmelia perlata, Parmelia caperata, Parmelia conspersa, Xanthoria parietina, Diploschistes ocellatus, Cladonia portentosa and Dermatocarpon miniatum and the lowest activity in Peltigera praetextata, Cladonia furcata, Cladonia rangiformis and Lobaria pulmonaria. A great variation was not observed among the individuals of Peltigera praetextata and Parmelia caperata collected from Akçaabat and Çamlihem, in.

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