| Abstract: | An analysis of the abundance and taxonomical structure of the heterotrophic block of aerobic and conditionally anaerobic bacteria
in hydromorphic tundra and taiga soils was carried out. The decline of the cultivating temperature from 20° to 5° did not
result in the reduction of bacterial abundance. The spectrum of the bacterial dominants in the northern cryogenic soils is
wider under 4–6°, which is indicative of the lowtemperature adaptation of bacteria. Oligotrophs and copiotrophs predominate
the bacterial communities of the explored soils. However, among hydrolytic bacteria, active chitin destructors, represented
by Bacillus and Janthinobacterium, were found. |
