Checklist of lithophytic algae in Bulgaria (1905-2024)

Abstract

The present paper provides a specified Checklist of lithophytic algae recorded in Bulgaria during the last 120 years, with indication of their epilithic or endolithic type. Altogether 369 taxa from seven phyla were reported in scientific papers from Bulgarian and foreign scientists: Cyanoprokaryota (208), Chlorophyta (83) and Streptophyta (22), Ochrophyta (52), Rhodophyta (2), Pyrrophyta (1) and Euglenophyta (1). Most of these algae were found from epilithic samples (342), and only 27 were endolithes. The number of taxa, identified after application of cultivation procedures and following of different stages of their development, is significantly lower (147) than the number of algae identified from field material by direct microscopy (222). However, it has to be stressed that during the last two decades all reports of lithophytes were based on a preliminary cultivation. The paper underlines the importance of living algal cultures, including those of lithophytes, for wide spectrum of biotechnological applications and stresses the need for future studies of this ecological group in Bulgaria.

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