Abstract
Recently a new habitat for microbial life has been discovered at the base of polythermal glaciers. In ice from these subglacial environments so far only non-photosynthetic bacterial communities were discovered, but no eukaryotic microorganisms. We found high numbers of yeast cells, amounting to a maximum of 4,000 CFU ml−1 of melt ice, in four different high Arctic glaciers. Twenty-two distinct species were isolated, including two new yeast species. Basidiomycetes predominated, among which Cryptococcus liquefaciens was the dominant species (ca. 90% of total). Other frequently occurring species were Cryptococcus albidus, Cryptococcus magnus, Cryptococcus saitoi and Rhodotorula mucilaginosa. The dominant yeast species were psychrotolerant, halotolerant, freeze-thaw resistant, unable to form mycelium, relatively small-sized and able to utilize a wide range of carbon and nitrogen sources. This is the first report on the presence of yeast populations in subglacial ice.
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Acknowledgements
The work in Kongsfjorden was funded by EU Large Scale Facility Fund. The work on identification of yeasts was supported by the Slovenian Ministry of Education, Science and Sport and Slovenia—Portugal bilateral collaboration. Special thanks are due to Nick Cox (NERC Station) for his logistic support and to Martin Grube for help with sequencing of yeasts.
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Butinar, L., Spencer-Martins, I. & Gunde-Cimerman, N. Yeasts in high Arctic glaciers: the discovery of a new habitat for eukaryotic microorganisms. Antonie van Leeuwenhoek 91, 277–289 (2007). https://doi.org/10.1007/s10482-006-9117-3
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DOI: https://doi.org/10.1007/s10482-006-9117-3