Abstract
Myxomycete communities are an integral component of forest biocenoses. For the first time, a comparative study of the composition and biodiversity of myxomycete complexes was carried out on the example of two sites of the Nurgush Reserve. It was found that the species diversity of myxomycetes is higher at the Nurgush site, and the interspecific associations of these organisms are more diverse at the Tulashor site. An important component of the myxomycete communities are lower and higher fungi. Micromycetes act as parasites, and higher fungi act as organisms that help myxomycetes develop new substrates, in particular, decomposing wood. An important component of communities are bacteria, which are not only a trophic resource for myxomycetes, but also contribute to their adaptation to the environment. Among the bacteria dominating in the composition of myxomycete communities, species synthesizing indole-3-acetic acid – a phytohormone of auxin nature are identified, in connection with which the sporophores of myxomycetes can be potential sources of biotechnologically valuable strains.