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

Newsham, Kevin K.; Pearce, David A.; Bridge, Paul D.. 2010 Minimal influence of water and nutrient content on the bacterial community composition of a maritime Antarctic soil. Microbiological Research, 165 (7). 523-530. 10.1016/j.micres.2009.11.005

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Abstract/Summary

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.

Item Type:	Article
Identification Number/DOI:	10.1016/j.micres.2009.11.005
Programmes:	BAS Programmes > Polar Science for Planet Earth (2009 - ) > Ecosystems
ISSN:	0944-5013
Additional Keywords:	Antarctica; Bacterial community composition; Leptolyngbya Cyanobacteria; delta-Proteobacteria; Soil water and chemistry
NORA Subject Terms:	Agriculture and Soil Science Biology and Microbiology Ecology and Environment
Date made live:	21 Dec 2010 13:37
URI:	http://nora.nerc.ac.uk/id/eprint/12537

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