Ecological and cenotic characteristics of communities involving the species of

On the territory of the Middle and Southern Urals, P. vulgaris is found in pine, spruce-pine, birch forests, meadows and in artificial spruce-larch forest plantations; P. grandiflora − in birch forests, less often on meadows. P. vulgaris is confined to half-open places or light-forest with moistening from sub-forest-meadow to wet forest-meadow with not very rich or rather rich soils. P. grandiflora grows in semi-open spaces and in light forests with moistening from wet-steppe to dry-forest-meadow with rather poor soils. Both species are found on very poor soils and the ones that are poor in nitrogen, having a weak acidic and acidic soil medium. According to the soil acidity factor, the amplitude of the ecological space of P. grandiflora coenopopulations on studied territory goes beyond the ranges of the ecological range according to the scales of D.N. Tsyganov