2007
DOI: 10.1128/aem.01729-06
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Characterization of the Prokaryotic Diversity in Cold Saline Perennial Springs of the Canadian High Arctic

Abstract: The springs at Gypsum Hill and Colour Peak on Axel Heiberg Island in the Canadian Arctic originate from deep salt aquifers and are among the few known examples of cold springs in thick permafrost on Earth. The springs discharge cold anoxic brines (7.5 to 15.8% salts), with a mean oxidoreduction potential of ؊325 mV, and contain high concentrations of sulfate and sulfide. We surveyed the microbial diversity in the sediments of seven springs by denaturing gradient gel electrophoresis (DGGE) and analyzing clone l… Show more

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Cited by 116 publications
(148 citation statements)
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“…Culture, molecular and microscopicbased analysis of the 16S rRNA gene indicated that the streamers were dominated by chemolithoautotrophic sulfur-oxidizing Thiomicrospira species that oxidized both sulfide and thiosulfate and fixed CO 2 under in situ conditions (Niederberger et al, 2009). These collective studies indicate that the utilization and cycling of sulfur compounds may have a major role in the energy production and maintenance of microbial communities in the GH and CP spring environments (Perreault et al, 2007;Niederberger et al, 2009). These cold saline springs are regarded as analogues to possible Martian liquid water habitats (Andersen et al, 2002).…”
Section: Introductionmentioning
confidence: 91%
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“…Culture, molecular and microscopicbased analysis of the 16S rRNA gene indicated that the streamers were dominated by chemolithoautotrophic sulfur-oxidizing Thiomicrospira species that oxidized both sulfide and thiosulfate and fixed CO 2 under in situ conditions (Niederberger et al, 2009). These collective studies indicate that the utilization and cycling of sulfur compounds may have a major role in the energy production and maintenance of microbial communities in the GH and CP spring environments (Perreault et al, 2007;Niederberger et al, 2009). These cold saline springs are regarded as analogues to possible Martian liquid water habitats (Andersen et al, 2002).…”
Section: Introductionmentioning
confidence: 91%
“…Further work identified culturable microbes from the spring sediments with autotrophic and sulfur-oxidation activities (Perreault et al, 2008), and the small amounts of hydrocarbons in gases exsolving from these springs were compositionally and isotopically consistent with microbial methanogenesis and possible methanotrophy (Perreault et al, 2007). Niederberger et al (2009) characterized gray-colored microbial streamers that form during the winter months in the snow-covered regions of the GH spring runoff channels.…”
Section: Introductionmentioning
confidence: 99%
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