Vertical-storey stratification of oligosporeous actinomycetes in differenttypes of biogeocenoses

The distribution of oligosporeous actinomycetes, conventionally combining t he representatives of the genera Actinomadura, Saccaromonospora, and Thermo monospora, Nocardia in the vertical-storey structure of forest, steppe, and semidesert biogeocenoses, was studied, and the share of the oligosporeous forms in the actinomycetes complexes was determined. The presence of calciu m and decomposing organic matter in the substrate promotes the development of oligosporeous actinomycetes. Oligosporeous actinomycetes are not rare in biogeocenoses and are most often found in coniferous forest and semidesert biogeocenoses.