Taxonomic and functional characterization of a microbial community from a volcanic englacial ecosystem in Deception Island, Antarctica.

摘要: Glaciers are populated by a large number of microorganisms including bacteria, archaea and microeukaryotes. Several factors such as solar radiation, nutrient availability water content greatly determine the diversity abundance these microbial populations, type metabolism biogeochemical cycles. Three ecosystems can be differentiated in glaciers: supraglacial, subglacial englacial ecosystems. Firstly, supraglacial ecosystem, sunlit oxygenated, is predominantly photoautotrophic microorganisms. Secondly, ecosystem contains majority chemoautotrophs that fed on mineral salts rocks basal soil. Lastly, least studied one smallest However, unknown establish food web appear to have an active metabolism. In order study their metabolic potentials, samples ice were taken from Antarctic glacier. Microorganisms analyzed polyphasic approach combines set -omic techniques: 16S rRNA sequencing, culturomics metaproteomics. This combination provides key information about functions especially rare habitats. whole essential proteins enzymes related energy production, recombination translation found demonstrate existence cellular activity at subzero temperatures. this way it shown not quiescent, but they maintain play important role glacial community.