You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
Bacterial Diversity in Three Different Antarctic Cold Desert Mineral Soils
Jacques J. Smith, Lemese Ah Tow, William Stafford, Craig Cary and Donald A. Cowan
Vol. 51, No. 4 (May, 2006), pp. 413-421
Published by: Springer
Stable URL: http://www.jstor.org/stable/25153334
Page Count: 9
Preview not available
A bacterial phylogenetic survey of three environmentally distinct Antarctic Dry Valley soil biotopes showed a high proportion of so-called "uncultured" phylotypes, with a relatively low diversity of identifiable phylotypes. Cyanobacterial phylotypic signals were restricted to the high-altitude sample, whereas many of the identifiable phylotypes, such as the members of the Actinobacteria, were found at all sample sites. Although the presence of Cyanobacteria and Actinobacteria is consistent with previous culture-dependent studies of microbial diversity in Antarctic Dry Valley mineral soils, many phylotypes identified by 16S rDNA analysis were of groups that have not hitherto been cultured from Antarctic soils. The general belief that such "extreme" environments harbor a relatively low species diversity was supported by the calculation of diversity indices. The detection of a substantial number of uncultured bacterial phylotypes showing low BLAST identities (<95%) suggests that Antarctic Dry Valley mineral soils harbor a pool of novel psychrotrophic taxa.
Microbial Ecology © 2006 Springer