Epiphyllous bryophytes in Arboretum Stradch (Ukraine)

Abstract

This work done in Arboretum Stradch (Ukraine) extended the investigation of the epiphyllous bryophytes diversity in the temperate zone started by Pundiak and Michalko (2020) in Arboretum Mlyňany (Slovakia). It was identified two taxa of not typically epiphyllous bryophytes, all belonging to mosses and considered as generalists and obligate members of bryoflora of Ukraine at low risk of extinction: Brachythecium salebrosum (Hoffm. ex F. Weber & D. Mohr) Schimp. and Hypnum cupressiforme Hedw. As epiphylls these taxa were also the most abundant in Mlyňany. The both identified epiphylls occurred mainly on young individuals of a gymnosperm phorophyte Abies alba Mill., which grew near the trunks of 50 years lindens Tilia cordata Mill.  abundantly covered by mosses. H. cupressiforme also occurred rarely on leaves of two deciduous angiosperm phorophytes: Corylus avellana L. and Ulmus glabra Huds. growing near trunks of 140 years oaks Quercus robur L. densely covered by the same moss species. B. salebrosum occurred also on one species of evergreen angiosperm phorophyte Rubus caesius L. (near mentioned trunks of T. cordata)  and on one species of deciduous angiosperm phorophyte Ulmus glabra Huds. (near mentioned trunks of Q. robur), but scarcely.