Microbial Diversity in a Permanently Cold and Alkaline Environment in Greenland
| Autor: | Jan Kjølhede Vester, Søren J. Sørensen, Mikkel A. Glaring, Jeanette E. Lylloff, Peter Stougaard, Waleed Abu Al-Soud |
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| Rok vydání: | 2015 |
| Předmět: |
Geologic Sediments
Firmicutes Greenland Adaptation Biological lcsh:Medicine Fjord RNA Archaeal Bacterial Physiological Phenomena RNA Ribosomal 16S lcsh:Science Phylogeny geography Multidisciplinary geography.geographical_feature_category Bacteria biology Ecology lcsh:R Soda Lakes Bacteroidetes Biodiversity Hydrogen-Ion Concentration biology.organism_classification Archaea Anoxic waters Cold Temperature RNA Bacterial Ikaite geography.geographical_feature lcsh:Q Proteobacteria Water Microbiology Research Article |
| Zdroj: | PLoS ONE, Vol 10, Iss 4, p e0124863 (2015) PLoS ONE Glaring, M A, Vester, J K, Lylloff, J E, Abu Al-Soud, W, Sørensen, S J & Stougaard, P 2015, ' Microbial diversity in a permanently cold and alkaline environment in Greenland ', PLoS ONE, vol. 10, no. 4, e0124863 . https://doi.org/10.1371/journal.pone.0124863 |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0124863 |
| Popis: | The submarine ikaite columns located in the Ikka Fjord in Southern Greenland represent a unique, permanently cold (less than 6°C) and alkaline (above pH 10) environment and are home to a microbial community adapted to these extreme conditions. The bacterial and archaeal community inhabiting the ikaite columns and surrounding fjord was characterised by high-throughput pyrosequencing of 16S rRNA genes. Analysis of the ikaite community structure revealed the presence of a diverse bacterial community, both in the column interior and at the surface, and very few archaea. A clear difference in overall taxonomic composition was observed between column interior and surface. Whereas the surface, and in particular newly formed ikaite material, was primarily dominated by Cyanobacteria and phototrophic Proteobacteria, the column interior was dominated by Proteobacteria and putative anaerobic representatives of the Firmicutes and Bacteroidetes. The results suggest a stratification of the ikaite columns similar to that of classical soda lakes, with a light-exposed surface inhabited by primary producers and an anoxic subsurface. This was further supported by identification of major taxonomic groups with close relatives in soda lake environments, including members of the genera Rhodobaca, Dethiobacter, Thioalkalivibrio and Tindallia, as well as very abundant groups related to uncharacterised environmental sequences originally isolated from Mono Lake in California. |
| Databáze: | OpenAIRE |
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