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Biodiversity and Abundance of Cultured Microfungi from the Permanently Ice-Covered Lake Fryxell, Antarctica

1
School of Marine Sciences and Molecular and Biomedical Sciences, University of Maine, Orono, ME 04469, USA
2
Adaptive Symbiotic Technologies, University of Washington, Seattle, WA 98195, USA
3
Scripps Institute of Oceanography, La Jolla, CA 92037, USA
*
Author to whom correspondence should be addressed.
Received: 4 June 2018 / Revised: 31 August 2018 / Accepted: 1 September 2018 / Published: 6 September 2018
(This article belongs to the Special Issue Fungi from Extreme Environments)
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Abstract

In this work, we explore the biodiversity of culturable microfungi from the water column of a permanently ice-covered lake in Taylor Valley, Antarctica from austral field seasons in 2003, 2008 and 2010, as well as from glacial stream input (2010). The results revealed that there was a sharp decline in total culturable fungal abundance between 9 and 11 m lake depth with a concurrent shift in diversity. A total of 29 species were identified from all three water sources with near even distribution between Ascomycota and Basidomycota (15 and 14 respectively). The most abundant taxa isolated from Lake Fryxell in 2008 were Glaciozyma watsonii (59%) followed by Penicillium spp. (10%), both of which were restricted to 9 m and above. Although seven species were found below the chemocline of 11 m in 2008, their abundance comprised only 10% of the total culturable fungi. The taxa of isolates collected from glacial source input streams had little overlap with those found in Lake Fryxell. The results highlight the spatial discontinuities of fungal populations that can occur within connected oligotrophic aquatic habitats. View Full-Text
Keywords: Antarctic; fungi; Lake Fryxell; permanently ice-covered lakes; extreme habitats Antarctic; fungi; Lake Fryxell; permanently ice-covered lakes; extreme habitats
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Connell, L.; Segee, B.; Redman, R.; Rodriguez, R.J.; Staudigel, H. Biodiversity and Abundance of Cultured Microfungi from the Permanently Ice-Covered Lake Fryxell, Antarctica. Life 2018, 8, 37.

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