| Title |
Microbial life in Bourlyashchy, the hottest thermal pool of Uzon Caldera, Kamchatka
|
|---|---|
| Published in |
Extremophiles, September 2015
|
| DOI | 10.1007/s00792-015-0787-5 |
| Pubmed ID | |
| Authors |
Nikolay A. Chernyh, Andrey V. Mardanov, Vadim M. Gumerov, Margarita L. Miroshnichenko, Alexander V. Lebedinsky, Alexander Y. Merkel, Douglas Crowe, Nikolay V. Pimenov, Igor I. Rusanov, Nikolay V. Ravin, Mary Ann Moran, Elizaveta A. Bonch-Osmolovskaya |
| Abstract |
Bourlyashchy is the largest and hottest pool in the Uzon Caldera, located in the territory of Kronotsky Nature Reserve, Kamchatka, Russia, with sediment surface temperatures at the margins ranging from 86 to 97 °C, and pH from 6.0 to 7.0. The microbial communities of the pool water and sediments were studied comprehensively from 2005 to 2014. Radioisotopic tracer studies revealed the processes of inorganic carbon assimilation, sulfate reduction, lithotrophic methanogenesis and potentially very active process of acetate oxidation to CO2. The total number of microbial cells in water was different in different years ranging from 5.2 to 7.0 × 10(6); in sediments, it changed from year to year between 6.3 × 10(6) and 1.75 × 10(8), increasing with a decrease in temperature. FISH with Archaea- and Bacteria-specific probes showed that the share of Bacteria differed with year, changing from 34 to 71 %. According to 16S rRNA gene pyrosequencing data, lithoautotrophs (Aquificales and Thermoproteales) predominated in water samples, while in sediments they shared the niche with organotrophic Crenarchaeota, Korarchaeota, and bacteria of the genus Caldimicrobium (phylum Thermodesulfobacteria). The majority of organisms in water belonged to cultivated orders of prokaryotes; the only large uncultured group was that representing a novel order in class Thermoprotei. In sediments, unclassified Aquificeae comprised a significant part of the bacterial population. Thus, we showed that the hottest of the terrestrial hot pools studied contains numerous and active microbial populations where Bacteria represent a significant part of the microbial community, and planktonic and sediment populations differ in both composition and function. |
X Demographics
The data shown below were collected from the profiles of 5 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 20% |
| Netherlands | 1 | 20% |
| Austria | 1 | 20% |
| Unknown | 2 | 40% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 3 | 60% |
| Scientists | 2 | 40% |
Mendeley readers
The data shown below were compiled from readership statistics for 40 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Russia | 1 | 3% |
| Canada | 1 | 3% |
| Unknown | 38 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 10 | 25% |
| Student > Ph. D. Student | 10 | 25% |
| Student > Bachelor | 6 | 15% |
| Student > Postgraduate | 3 | 8% |
| Professor | 2 | 5% |
| Other | 4 | 10% |
| Unknown | 5 | 13% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 11 | 28% |
| Biochemistry, Genetics and Molecular Biology | 4 | 10% |
| Immunology and Microbiology | 4 | 10% |
| Engineering | 3 | 8% |
| Environmental Science | 2 | 5% |
| Other | 7 | 18% |
| Unknown | 9 | 23% |
Attention Score in Context
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All research outputs
#14,846,355
of 24,885,505 outputs
Outputs from Extremophiles
#494
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Outputs of similar age
#132,453
of 273,296 outputs
Outputs of similar age from Extremophiles
#1
of 14 outputs
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