Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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The Bacterial Community of Southern Lake Baikal in Winter

  • Ahn, Tae-Seok (Department of Environmental Science, Kangwon National University, Chunchon) ;
  • Hong, Sung-Hee (Department of Environmental Science, Kangwon National University, Chunchon) ;
  • Kim, Dong-Joo (Department of Environmental Science, Kangwon National University, Chunchon) ;
  • Suck, Jung-Hyun (Department of Environmental Science, Kangwon National University, Chunchon) ;
  • Valentin V. Drucker (Limnological Institute Russian Academy of Science Siberian Branch, Russia)
  • Published : 1999.03.01
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Abstract

The bacterial abundance, proportion of respiring bacteria, and bacterial community of southern Lake Baikal were analyzed at 1 m and 400m depths during winter. The total bacterial numbers were 5.1${\times}$105 cells ml-1 at 1 m and 2.5${\times}$105 cells ml-1 at 400 m depth, which are about half and quarter of the numbers of other lakes. The proportion of respiring bacteria was as low as 2.5% at 1 m and 1.4% at 400 m depth. Considering the amount of organic carbon which need to be degraded and low proportion of respiring bacteria, the bacteria could be assumed to have high activities. The EUB/DAPI ratios were 77 and 89% at 1 m and 400 m depths, respectively. Of the bacterial community, the other group was dominant at both depths, and gamma group of protebacteria followed next. But the beta group of proteobacteria and Cytophaga-Flavobacterium groups occupied very small proportions.

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References

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