РОСЛИННІСТЬ СОЮЗУ NYMPHAEION ALBAE OBERDORFER 1957 НАЦІОНАЛЬНОГО ПРИРОДНОГО ПАРКУ «ПИРЯТИНСЬКИЙ»

Abstract

National Nature Park “Pyryatynsky” is a valuable reserve of flora and vegetation of the Left-Bank Dnipro. The extensive hydrological network of the Udai River and the wide representation within this nature reserve of floodplain reservoirs are the reason for the high diversity of plant communities of higher aquatic vegetation. In this article, we classified the communities of alliance Nymphaeion albae Oberdorfer 1957 in the National nature park "Pyryatynskyi" and identify the features of their syntaxonomic and ecological differentiation. The literature on this type of vegetation is fragmentary, without any geobotanical information and detailed characteristics of the structure of phytoceonoses, synecology and synchorology. All obtained results are based on original field data. In total, 46 geobotanical relieves were performed during the period 2010–2017. The description of communities was carried out within their natural boundaries. Treatment of fitosociological data was performed with the JUICE software package. The nomenclature of syntaxons was consistent with the International Code of Phytosociological Nomenclature (ICFN).The alliance Nymphaeion albae Oberdorfer 1957 on the territory of NPP "Pyriatynsky" is represented by 4 associations Nymphaeo albae–Nupharetum luteae Nowinski 1927, Nymphaeetum albae Vollmar 1947, Nymphaeetum candidae Miljan 1958 and Potamo natantis–Persicarietum natantis Knapp et Stoffers 1962 nom. mutat. propos.This is first prodrome of alliance Nymphaeion albae Oberdorfer 1957 for the territory of National Nature Park “Pyryatynskyi”. The communities of this syntaxon occupy small areas and have a limited distribution in the region. Most of them are rare and vulnerable to changes in environmental conditions. Monitoring of their structure, chorology, and dynamics is an important task to maintain and preserve the species and coenotic diversity of NPP "Pyryatynsky".