Ecological and floristic characteristics of Cyanophyceae of Pryazovskyi National Nature Park

. The north-western coast of the Sea of Azov is a set of natural systems that are characterized by a high level of biological diversity, economic value and have a high recreational potential. The harmonization of nature protection goals, optimization of economic efficiency and maintenance of recreational value are extremely complex scientific and scientific-practical tasks. The development of a strategy for the rational use of nature should be based on the study of natural complexes that are within the protected areas as reference areas. In addition to the role of markers of the level of biological diversity, the objects of the nature reserve fund act as factors of functional stability of natural complexes in general. Therefore, the study of ecological features of Cyanoprokaryota Priazovsky National Nature Park is an important scientific problem. There were 9 experimental landfills on the territory of Priazovsky Park, which covered steppe areas or slopes, salt marshes, coastal sandy soils (bars) and reservoirs (rivers, lakes, estuaries, sea bays, lagoons). As a result of research, 124 species of cyanoprokaryotes were identified, which include 127 intraspecific taxa. According to the systematic structure, the found species of cyanoproka- ryotes belong to the class Cyanophyceae Sachs, within which 3 subclasses, 6 orders, 18 families and sharply in freshwater. According to Pielow, the diversity grows within this range and reaches the highest level in freshwater. Prospects for further research include assessing the systematic nature of the taxonomic structure of flora depending on the type of ecosystems, the study of ecototype groups of Cyanophyceae in the context of their preferences for habitat types and salinity conditions. the flora of Cyanophyceae is represented by a much smaller number of genera compared to other types of biogeocenoses. According to the Shannon index, diversity increases in the series steppe → salt marsh → psammophytic stations → salt water and decreases sharply in freshwater. According to Pielow, the diversity grows within this range and reaches the highest level in freshwater. Prospects for further research include assessing the systematic nature of the taxonomic structure of flora depending on the type of eco systems, the study of ecototype groups of Cyanophyceae in the context of their preferences for habitat types and salinity conditions. According to Pielow, the diversity grows within this range and reaches the highest level in freshwater. Prospects for further research include assessing the systematic nature of the taxonomic structure of flora depending on the type of ecosystems, the study of ecototype groups of Cyanophyceae in the context of their preferences for habitat types and salinity conditions.