Epiphytic bryophyte communities of the Dendrological Park 'Olexandria' of the NAS of Ukraine

The article presents the results of research on epiphytic bryophyte communities of the Dendrological Park “Olexandria”. The study was conducted in the historical part of the arboretum in 2021. Among the investigated phorophytes were the following tree species: Acer platanoides, A. pseudoplatanus, Betula pendula, Carpinus betulus, Fraxinus excelsior, Quercus robur, Populus sp., Salix babylonica, and some others. The research results showed that the epiphytic bryophyte vegetation of the historical part of the Dendrological Park “Olexandria” is represented by two unranked communities and 11 associations belonging to six unions, four orders, and three classes. The most widespread in the arboretum are the associations Dicrano scoparii-Hypnetum filiformis, Platygyrietum repentis, Leskeetum polycarpae, and the rankless community Leucodon sciuroides of the class Frullanio dilatatae-Leucodontetea sciuroidis. It is shown that in terms of the number of detected bryophyte associations, the Dendrological Park “Olexandria” is similar to the National Nature Park “Homilsha Woods”, which is located in the Kharkiv region (hosts 11 reported associations) and the Nature Reserve “Kanivskyi” in the Cherkasy region (12 reported associations). However, it is poorer than the National Nature Park “Holosiivskyi” in Kyiv, where 16 bryoassociations were registered.