Wood decay community of raised bogs in West Siberia

Inventory of wood decay community of raised bogs wa st rted in taiga zone of West Siberia (near the K antyMansiysk town). We examined dead wood of Pinus sylvestris which creates substantial biomass in treed Pine – dwarfshrubs – Sphagnum ombrotrophic communities. 49 species of larger fun gi from five groups (corticioid, polyporoid, heterobasidiomycetous, agaricoid, clava rioid basidiomycetes, and discomycetes) were regist red by direct observation of fruit bodies. Inhabited substrates w ere: partly buried in sphagnum decorticated logs, s tumps, butts of standing logs, and bark. Only one publication about wood decay fungi on Pinus sylvestris in the region was previously concerned with bog wood, species lists of two studi es only partly coincide. 13 identified species repr esent new records for the region, three of them with a few collection s i Russia. Two xerotolerant species were register ed regularly on bog wood (Amyloporia xantha, Sistotremastrum suecicum ). Some species represented by several collections: Coniophora arida, Peniophorella praetermissa, Phlebiella pseud ots gae, Piloderma byssinum, and Dacrymyces stillat us. Major part of the list (43 species) were collected once and tw ice. Large part of species from the list are adapted for decomposition of wide spectrum of coniferous and d eciduous trees and also reported on mosses, and miscellaneou s substrates of soil litter. Six species cause brow n rot type, 23 species are white rotters, discomycetes cause poor decomposition (soft rot), and six corticioid specie s form mycorrhiza with Pine. Other authors have showed ability of wood decompo sers to cause weight loss of Sphagnum peat, propagules of Antrodia and Gloeophyllum were isolated from peat. This confirmed in our stu dy: eight corticioid species were registered on peaty substrates adjoining wood surfa ces, and two species were growing on living Sphagnum in absence of wood.