Floristic features of types of birch forests in the northern forest-steppe of Western Siberia

The article presents the results of studying the floristic composition of the living ground cover of native birch forests in the conditions of the northern forest-steppe of Western Siberia. Despite the fact that the vegetation of birch forests of Western Siberia is given great attention [1-6], the flora of birch forests of different typological affiliations in the subzone of the northern forest-steppe remains insufficiently studied. The investigations were carried out on the territory of the Abatsky leskhoz of the Tyumen region in the middle-aged birch forests, unbroken by felling, with a density of 0.5-0.8. It is shown that in placer conditions, the largest proportion of birch forest formations occurs in the types of the mixed-herb group. Four types of birch forests have been identified, which, as the moisture content and soil wealth of ecotopes increase, can be arranged in the following range: wood-reed-berry, wood-reed-grass, cereal - grass and dropwort-cereal. Complete lists of species of grass cover are given, indicating their abundance on the Drude scale for each of the types of birch forests studied...