MICROBIAL BIOMASS AND ITS ACTIVITY IN PEAT BOGS OF SIBERIA
The authors studied soil microbial activity in oligotrophic, eutrophic and mesotrophic peat bogs of Siberia by method of substrate-induced respiration (SIR). Intensity of microbiological processes depends on the type of peat bogs and hydrothermal conditions. The average for vegetation period 2013, the highest microbial biomass was observed in oligotrophic peat bog of Vasyugan (4,16 mcg/g dry peat, with limits – 1,66–8,28 mcg/g d. p.). The minimum value of microbial biomass was recorded in mesotrophic peat bogs Kutushskoe (3,29 mcg/g d. p., with limits 0,78–6,94 mcg/g d. p.). Eutrophic bog Tagan on the microbial biomass took an intermediate position (middle – 3,74 mcg/g d. p., limits – 0,41–13,43 mcg/g d. p.). Investigated bogs can be arranged in the following order of intensive basal respiration: eutrophic bog Tagan > oligotrophic bog Vasyugan > mesotrophic bog Kutushskoe. It is fixed that in spite of genetic differences all bogs had the stable ecophysiological status. Functioning of microbial communities of peat bogs is within natural variability, and indicates their environmental sustainability. The eutrophic bog Tagan is not resistant to environmental factors.
Keywords: Siberia, peat bogs, microbial activity, substrate-induced respiration (SIR) method, microbial biomass, basal respiration, metabolic quotient
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Issue: 2, 2015
Series of issue: Issue 2
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