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Spatial Distribution and Interannual Dynamics of Bacterioplankton in the Taishir and Durgun Reservoirs (Western Mongolia)

  • AQUATIC MICROBIOLOGY
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Abstract

The spatial distribution and interannual dynamics of the abundance and biomass of heterotrophic bacterioplankton have been evaluated in two recently formed large freshwater reservoirs (the Taishir and Durgun reservoirs, the Great Lakes Depression, Western Mongolia). The total abundance of bacteria range from 2.5 × 106 to 14.5 × 106 cells/mL; biomass is from 45 to 386 mg C/m3. These parameters reach the level of eutrophic waters in both reservoirs, but they are on average 1.4 times higher in the Durgun reservoir. The bacterioplankton of the reservoirs is probably in the formation stage. Free-living cells are the basis of the number and biomass of bacterioplankton. They average 91.0% of the total biomass. The larger aggregated and filamentous bacteria contribute significantly less to the total biomass of the community—an average of 6.7 and 2.3%, respectively—and reach the highest abundance and biomass in the littoral zone of the reservoirs.

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Funding

This work was carried out as part of State Assignment no. AAAA-A18-118012690098-5. Expeditionary studies were carried out with financial and organizational support of the Joint Russian–Mongolian Integrated Biological Expedition of the Russian Academy of Sciences and Mongolian Academy of Sciences.

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  1. Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Nekouzskii raion, Yaroslavl oblast, Russia

    D. B. Kosolapov

  2. Cherepovets State University, Cherepovets, Russia

    D. B. Kosolapov

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  1. D. B. Kosolapov
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Correspondence to D. B. Kosolapov.

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Translated by Z. Litvinenko

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Kosolapov, D.B. Spatial Distribution and Interannual Dynamics of Bacterioplankton in the Taishir and Durgun Reservoirs (Western Mongolia). Inland Water Biol 13, 387–398 (2020). https://doi.org/10.1134/S1995082920030098

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  • DOI: https://doi.org/10.1134/S1995082920030098

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