Epiphytic algoflora of trees and mosses in the urban environment

Abstract

The study of the taxonomic and ecological structure of the epiphytic algoflora of woody plants and mosses under conditions of aerotechnogenic pollution has been made for the first time/ Four species of trees were selected as objects for research: deciduous (Tilia cordata Mill., Quercus robur L.) and coniferous (Pisea obovata Ledeb., Pinus sylvestris L.); and four species of mosses Ceratodon purpureus (Hedw.) Brid, Dicranum montanum Hedw., Nyholmiella obtusifolia (Brid.) Holmen & E.Warncke, Pylaisia polyantha (Hedw.) Schimp. A taxonomic list has been compiled, including 113 species and intraspecific taxa of algae belonging to 4 divisions, 9 classes, 44 families, and 62 genera, of which 85 were found on trees and 48 on mosses. Representatives of the Chlorophyta and Cyanobacteria divisions prevailed. The most common species were Desmococcus olivaceus, Trentepohlia umbrina, Trebouxia arboricola and Mychonaster homoshaera. As the species diversity of the epiphytic algoflora decreases, woody plants are arranged in the following order Tilia cordata – 42 taxa, Picea obovata  –  38, Pinus sylvestris –35, Quercus robur –32; mosses Dicranum montanum –23, Ceratodon purpureus –18, Pylaisia polyantha – 13. Nyholmiella obtusifolia –10. The general formula of the ecobiomorph is: Ch28 P17 H12 X11 CF9 Aer9 C9 B9 hydr4 amph4 PF1 M1. For bark of trees: Ch24 P17 H10 CF9 X5 C5 Aer4 B4 hydr4 amph2 PF1, for mosses: Ch9 Aer6 P5 B5 H5 X5 CF4 C4 hydr3 amph1 M1. The specificity of the epiphytic algoflora of woody plants and mosses has not been revealed depending on the habitat conditions, it has been shown that the results obtained cannot be used for biomonitoring.