Vertical distribution of communities of epiphytic myxomycetes on woody introduced plants in Siberia
A. V. Vlasenko1, M. A. Tomoshevich1, B. P. Chelobanov2,3
1Central Siberian Botanical Garden SB RAS, Novosibirsk, Russia
2Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
3Novosibirsk State University, Novosibirsk, Russia
Keywords: vertical structure of communities, mushroom-like protists, arboretum, introduced plants, new species for Russia, scanning electron microscopy, slime molds, ecology, epiphytes
Abstract
The taxonomic diversity of epiphytic myxomycetes on living woody plants in the arboretum of the Central Siberian Botanical Garden SB RAS was studied. The regularity of the distribution community of epiphytic myxomycetes by trunk height has been established. All samples of myxomycetes were obtained by cultivation moist chambers in Petri dishes in the laboratory. Bark sampling from live woody plants was carried out at the height of the trunks from 0 to 15 meters from the soil level. Nine species of deciduous woody introduced plants participated in the experiment: Fraxinus pennsylvanica, Prunus maackii, Populus alba, Salix alba, S. pentandra, S. triandra, Sorbus aucuparia, Tilia cordata, Junglans mandshuria. Fifty-one species of myxomycetes have been identified. The species composition of myxomycetes on the studied woody plants differs significantly from that on native tree species growing on the territory of the botanical garden. Two species have been identified as new to science from the genera Arcyria and Trichia, three species are new to Russia (Didymium clavodecus, D. ovoideum, D. synsporon), eighteen species are new to the Novosibirsk region. The change in the taxonomic composition of myxomycetes community′s correlates with the height from the soil surface. Representatives of the genus Perichaena are found at all altitudes, but the greatest species diversity is noted in the basal part. There are 7 species noted here, while the species of the genus Didymium have the maximum species diversity (6 species) at an altitude of 5 meters, including 3 species new to Russia, noted only at this altitude. The distribution of the number of collected samples by height showed that the bark of living woody plants is most abundantly populated at a height of 5 meters (72 samples) and in the basal part (50 samples).
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