Document Type

Article

Publication Date

Summer 10-2009

Publication Source

Soil Biology and Biochemistry

Volume

41

Inclusive pages

2069-2074

Peer Reviewed

yes

Abstract

Archaea are common and abundant members of biological soil crust communities across large-scale biogeographic provinces of arid North America. Regardless of microbial community development, archaeal populations averaged 2 × 107 16S rRNA gene copies per gram of soil, representing around 5% of the prokaryotic (total calculated bacterial and archaeal) numbers assessed by quantitative-PCR. In contrast, archaeal diversity, determined by denaturing gradient gel electrophoresis fingerprinting and clone libraries of 16S rRNA genes, was very restricted. Only six different phylotypes (all Crenarchaea) were detected, three of which were very dominant. Some phylotypes were widespread, while others were typical of Southern desert areas.

Disciplines

Biology | Environmental Microbiology and Microbial Ecology

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