Species diversity of ground lichens in the raised bog vegetationof the Irtysh left-bank terraces

The article presents first data obtained while studying lichen flora of the oligotrophic peatland near the Field Station Mukhrino which is located on the Irtysh left-bank terrace 30 km southwest of Khanty-Mansiysk (60º53' N, 68º42' E). Vegetation study resulted in detecting ground lichen species of pine-dwarf shrub sphagnum moss communities in the region ombrotrophic mires including 19 species and subspecies of Cladonia, 2 species of Cetraria and a representative of crustose lichen - Icmadophila ericetorum. The most widespread species of the ombrotrophic sphagnum mires at the main study site are Cladonia stygia, C. stellaris, C. sulphurina, C. cornuta, C. cenotea, C. chlorophaea.
The importance of thorough investigation of the ombrotrophic mire lichens as a global climate change bio indicators is being considered. For this reason an attempt has been made to compare species composition of ground lichens for one-type pine-dwarf shrub sphagnum moss communities of Milio anomala-Sphagnetum fusci association in different bioclimatic zones (sub-taiga, southern taiga, middle taiga) of Western Siberia. It is ascertained that such species as Cladonia deformis, C. fimbriata, to a less extend C. portentosa, are more phytocenologically active in a milder climate in the south of forest zone, though the species' geographic range is wide enough. Cladonia stygia, C. arbuscula, C. sulphurina, C. crispata occur more frequently northward.

Cladonia, peatland lichen flora, ground lichens, Cladonia, raised bog, ombrotrophic mires, Western Siberia, global climate change