Minimal influence of water and nutrient content on the bacterial community composition of a maritime Antarctic soil

Bacterial community composition was determined by culture-independent PCR-based methods in two soils differing markedly in their water, C, N and P contents sampled from Mars Oasis on Alexander Island, western Antarctic Peninsula. 16S rRNA sequences of the phyla Actinobacteria, Cyanobacteria, alpha-Proteobacteria and Acidobacteria were commonly (>8% frequency) obtained from soil. Those of beta-, gamma- and delta-Proteobacteria, Chloroflexi, Bacteroidetes, Verrucomicrobia, Planctomycetes, Gemmatimonadetes and Firmicutes were less frequent. Comparisons of slopes of collector's curves and the Shannon-Weiner diversity index indicated no difference in overall bacterial diversity between the two soils, although sequences of delta-Proteobacteria and the cyanobacterial genus Leptolyngbya were more commonly derived from the soil with the higher water and nutrient content. The data suggest that different levels of soil water, C, N and P have only a minor effect on the bacterial community composition of maritime Antarctic soils.

Details

Publication status:
Published
Author(s):
Authors: Newsham, Kevin K., Pearce, David A., Bridge, Paul D.

On this site: David Pearce, Kevin Newsham
Date:
1 January, 2010
Journal/Source:
Microbiological Research / 165
Page(s):
523-530
Digital Object Identifier (DOI):
https://doi.org/10.1016/j.micres.2009.11.005