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.