The authors revealed the patterns of changes in forest ecosystems located in the zone of influence of the Ukhta-Torzhok gas main. The geobothanical mapping of the area under study is performed. Polypores were used as bioindicators of xylium transformations. The greatest changes in wood-inhabiting mycobiota occurred in the spruce forests, birch forests and aspen forests, which belong to the wood sorrel, bilberry and grass-oak series. Probable cause of the observed changes in forest communities are the changes in the hydrological regime and the underflooding of the most part of the territory.

forest ecosystems, bioindication, polypores, species composition, degradation degree, gas main

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