Micromosaic structure and phytomass of ground vegetation in main types of dark conifer forests in the Pechora-Ilych state nature reserve

The micromosaic structure of plant communities in dark conifer forests of dwarf shrub-true moss, boreal small herb-true moss, tall fern, and boreal tall herb subsections was studied in the Pechora-Ilych reserve. A typological scheme of microsites was constructed and the alpha-diversity of plants was assessed in microsites of different types; dominant and high-constancy species were identified. The proportions of area occupied by different microsites in test plots were calculated, and amounts of aboveground and belowground phytomass were estimated for every vascular plant species, dominant moss species, and the moss synusia as a whole in microsites of each type.