This paper presents the results of the floristic and taxonomic analysis of of algae of the National Nature Park Pripyat–Stokhid. A total of 593 species (620 infraspecies taxa) from 10 divisions of algae are cited for the park's water bodies. Bacillariophyta (27.4%) and Chlorophyta (26.8%) lead in species number. Algae were unevenly distributed in water bodies of different types. The greatest diversity found in lakes (62.4% of the total species number) and rivers (51.6%); in swamps their composition was less diverse (25.3%). Peculiarities of algal diversity in various water bodies and the nature of their similarity are discussed. Species composition of algae was most similar in the rivers, ameliorative canals and lakes; marshes and wetlands were most peculiar in terms of algal flora. In the National Nature Park Pripyat–Stokhid 11 rare and regionally rare species (13 intraspecific taxa) of algae were recorded including one listed in the Red Data Book of Ukraine.
Keywords: algae, species diversity, rare species, National Nature Park Pripyat–Stokhid, Ukraine
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