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APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Feb. 2006, p. 16631666 Vol. 72, No. 2 0099-2240/06/$08.00 0 doi:10.1128/AEM.72.2.16631666.2006
 

Summary: APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Feb. 2006, p. 16631666 Vol. 72, No. 2
0099-2240/06/$08.00 0 doi:10.1128/AEM.72.2.16631666.2006
Copyright 2006, American Society for Microbiology. All Rights Reserved.
Biodiversity of Methanogenic and Other Archaea in the Permanently
Frozen Lake Fryxell, Antarctica
Elizabeth A. Karr, Joshua M. Ng, Sara M. Belchik, W. Matthew Sattley, Michael T. Madigan,
and Laurie A. Achenbach*
Department of Microbiology, Southern Illinois University, Carbondale, Illinois 62901
Received 6 September 2005/Accepted 21 November 2005
Archaea were detected in molecular diversity studies of the permanently frozen Lake Fryxell, Antarctica. Two
clusters of methanogens were detected in the sediments, and another cluster of possibly methanotrophic
Euryarchaeota was detected in the anoxic water column just above the sediments. One crenarchaeote was
detected in water just below the oxycline. The Archaea present in Lake Fryxell are likely involved in the major
biogeochemical cycles that occur there.
Several permanently frozen lakes exist in the Taylor Valley,
McMurdo Dry Valleys, Antarctica. These lakes support an
exclusively microbial biology and have waters that vary from
strictly freshwater to hypersaline (33). Lake Fryxell is essen-
tially a freshwater lake (18, 33) and is the most productive of
the lakes in the Taylor Valley (20). However, Lake Fryxell also

  

Source: Achenbach, Laurie A. - Department of Microbiology, Southern Illinois University

 

Collections: Environmental Sciences and Ecology; Environmental Management and Restoration Technologies; Biology and Medicine