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Microbiology

, Volume 87, Issue 6, pp 817–824 | Cite as

Role of Cultured Microorganisms from Biofilms Formed on Rocky Substrates in the Lake Baikal Self-Purification System

  • M. Yu. Suslova
  • O. S. Pestunova
  • E. V. Sukhanova
  • Yu. R. Shtykova
  • T. Ya. Kostornova
  • I. V. Khanaev
  • M. V. Sakirko
  • V. V. Parfenova
EXPERIMENTAL ARTICLES
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Abstract

Differences in the quantitative and qualitative compositions of various physiological and biochemical groups of cultured microorganisms were revealed in biofilms formed on stony substrates in the littoral zone of Southern Baikal (August 2012) in the areas with different anthropogenic load. Maximal abundance of microorganisms was registered in epilithic biofilms from the area of Baikalsk Pulp and Paper Plant: organotrophs (770.2 ± 290.3 × 103 CFU/cm2); amylolytics (38.1 ± 7.7 × 103 CFU/cm2); phosphate-solubilizing microorganisms (4.8 ± 1.4 × 103 CFU/cm2); phosphate-mobilizing microorganisms (212.0 ± 27.6 × 103 CFU/cm2); phenol-oxidizing microorganisms (15.7 ± 2.4 × 103 CFU/cm2); molds (3.2 ± 0.4 × 103 CFU/cm2); and total coliform bacteria (193.3 ± 28.2 CFU/cm2), with the total microbial abundance (TMA at 37°C) of 24.9 ± 1.7 × 103 CFU/cm2, which indicated high degrading activity of the biofilms in response to the anthropogenic load in the area. Epilithic biofilms of the Bol’shie Koty area exhibited the lowest abundance of organotrophic and phosphate-solubilizing microorganisms, while molds were absent.

Keywords:

Lake Baikal epilithic biofilms organotrophs amylolytics phosphate-solubilizing microorganisms phosphate-mobilizing microorganisms oil-oxidizing microorganisms phenol-oxidizing microorganisms cellulose-degrading microorganisms 

Notes

ACKNOWLEDGMENTS

The study was carried out as a part of the government task, project no. 0345-2016-0003 (Microbial and viral communities in biofilms…; AAAA-A16-116122110061-6).

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • M. Yu. Suslova
    • 1
  • O. S. Pestunova
    • 1
  • E. V. Sukhanova
    • 1
  • Yu. R. Shtykova
    • 1
  • T. Ya. Kostornova
    • 1
  • I. V. Khanaev
    • 1
  • M. V. Sakirko
    • 1
  • V. V. Parfenova
    • 1
  1. 1.Limnological Institute, Siberian Branch, Russian Academy of SciencesIrkutskRussia

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