- Diversity of Cyanobacterial Species and Phylotypes in Biofilms from the Littoral Zone of Lake Baikal
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Ekaterina G. Sorokovikova , Olga I. Belykh , Anna S. Gladkikh , Oleg V. Kotsar , Irina V. Tikhonova , Oleg A. Timoshkin , Valentina V. Parfenova
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J. Microbiol. 2013;51(6):757-765. Published online December 19, 2013
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DOI: https://doi.org/10.1007/s12275-013-3240-4
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The majority of naturally occurring biofilms contain numerous
microorganisms that have not yet been cultured.
Additionally, there is little information available regarding
the genetic structure and species diversity of these communities.
Therefore, we characterised the species diversity, structure
and metagenome of biofilms grown on stones and
steel plates in the littoral zone of Lake Baikal (East Siberia,
Russia) by applying three different approaches. First, light
microscopy enabled identification of the species diversity of
biofilm-forming cyanobacteria on different substrates with
the dominance of Rivularia rufescens, Tolypothrix limbata,
Chamaesiphon fuscus, Сh. subglobosus, and Heteroleibleinia
pusilla. Additionally, scanning electron microscopy was used
to show the spatial structure of biofilms. Finally, sequence
analysis of 30,660 16S rRNA clones indicated a high diversity
within the biofilm communities, with the majority of the
microbes being closely related to Cyanobacteria (8–46% sequences),
Proteobacteria (14–43%), and Bacteroidetes (10–
41%). Rivularia sp., Pseudanabaena sp., and Chamaesiphon
spp. were the dominant cyanobacterial phylotypes.
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Citations
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- Ecological Development and Genetic Diversity of Microcystis aeruginosa from Artificial Reservoir in Russia
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Nikolay A. Gaevsky , Vladimir I. Kolmakov , Olga I. Belykh , Irina V. Tikhonova , Yochan Joung , Tae Seok Ahn , Valentina A. Nabatova , Anna S. Gladkikh
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J. Microbiol. 2011;49(5):714-720. Published online November 9, 2011
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DOI: https://doi.org/10.1007/s12275-011-0523-5
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783
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12
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Abstract
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Microcystis aeruginosa is a well-known Cyanobacterium responsible for the formation of toxic water blooms around the world. Shallow, warm, and eutrophic reservoirs provide the most favourable conditions for M. aeruginosa development. Numerous studies have been devoted to this species, but there still is a necessity to develop additional approaches for the monitoring of cyanobacteria in reservoirs. In this study, M. aeruginosa in the water column of a hypereutrophic Siberian reservoir was investigated by fluorescence, light, and electron microscopy as well as genetic analysis using a mcyE marker. Here, we demonstrate the genetic diversity and features of the fluorescence spectra for different ecotypes of this species. We suggest that a fluorescence approach can be used to identify M. aeruginosa in a natural environment in order to increase the effectiveness of ecological monitoring and water quality evaluation.
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Citations
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Judit Padisák, Gábor Vasas, Gábor Borics
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Seung-Hyun Joung, Hee-Mock Oh, Kyung-A You
Journal of Microbiology.2016; 54(8): 543. CrossRef - Determination of phytoplankton density, and study of the variation of nutrients and heavy metals in the surface water of Riva Stream; one of the water sources of Istanbul, Turkey
Nese Yilmaz, Ibrahim Ilker Ozyigit, Goksel Demir, Ibrahim Ertugrul Yalcin
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Ginji Nakamura, Shigeko Kimura, Yoshihiko Sako, Takashi Yoshida
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