Home – Home – Jornals – Contemporary Problems of Ecology 2005 number 1

Changes of the species composition and structure of the living surface cover under the influence of controlled burning in the pine stand of shrub-lichen-green moss subzone of middle taiga of Central Siberia were studied. Destruction of the moss-lichen cover and degradation of mosses and lichens take place already in the first year after a fire. The direction of the initial stage of pyrogenic succession is determined by the depth of burning of the litter and by the degree of damage of the surface cover. After fires of weak intensity, the cover mosaicism is decreased due to magnification of small contours, and after strong ones, formation of a small-contour mosaicism is observed. In this case, the leading role in the cover structurization is played by explerent or early succession species. Thanks to the pyrofitness of the pine and manifoldity of the formed pyroecological regimes, the species diversity of the grass-shrub storey is conserved, and it is only the abundance and the projective cover of plant species that change.