The structure of the microbial communities in low-moor and high-moor peat bogs of Tomsk oblast |
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| Authors: | T G Dobrovol’skaya A V Golovchenko O S Kukharenko A V Yakushev T A Semenova L A Inisheva |
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| Institution: | 1.Faculty of Soil Science,Lomonosov Moscow State University,Moscow,Russia;2.Severtsov Institute of Ecology and Evolution,Russian Academy of Sciences,Moscow,Russia;3.Tomsk State Pedagogical University,Tomsk,Russia |
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| Abstract: | The number, structure, and physical state of the microbial communities in high-moor and low-moor peat bogs were compared.
Distinct differences in these characteristics were revealed. The microbial biomass in the high-moor peat exceeded that in
the low-moor peat by 2–9 times. Fungi predominated in the high-moor peat, whereas bacteria were the dominant microorganisms
in the low-moor peat. The micromycetal complexes of the high-moor peat were characterized by a high portion of dark-colored
representatives; the complexes of the low-moor peat were dominated by fast-growing fungi. The species of the Penicillum genus were dominant in the high-moor peat; the species of Trichoderma were abundant in the low-moor peat. In the former, the bacteria were distinguished as minor components; in the latter, they
predominated in the saprotrophic bacterial complex. In the high-moor peat, the microorganisms were represented by bacilli,
while, in the low-moor peat, by cytophages, myxobacteria, and actinobacteria. The different physiological states of the bacteria
in the studied objects reflecting the duration of the lag phase and the readiness of the metabolic system to consume different
substrates were demonstrated for the first time. The relationships between the trophic characteristics of bacterial habitats
and the capacity of the bacteria to consume substrates were established. |
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