Hypolithic and soil microbial community assembly along an aridity gradient in the Namib Desert

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dc.contributor.author Stomeo, Francesca
dc.contributor.author Valverde, Angel
dc.contributor.author Pointing, Stephen B.
dc.contributor.author McKay, Christopher P.
dc.contributor.author Warren-Rhodes, Kimberley A.
dc.contributor.author Tuffin, Marla I.
dc.contributor.author Seely, Mary
dc.contributor.author Cowan, Don A.
dc.date.accessioned 2013-04-26T07:24:14Z
dc.date.available 2013-04-26T07:24:14Z
dc.date.issued 2013-02-09
dc.description.abstract The Namib Desert is considered the oldest desert in the world and hyperarid for the last 5 million years. However, the environmental buffering provided by quartz and other translucent rocks supports extensive hypolithic microbial communities. In this study, open soil and hypolithic microbial communities have been investigated along an East–West transect characterized by an inverse fog-rainfall gradient. Multivariate analysis showed that structurally different microbial communities occur in soil and in hypolithic zones. Using variation partitioning, we found that hypolithic communities exhibited a fog-related distribution as indicated by the significant East– West clustering. Sodium content was also an important environmental factor affecting the composition of both soil and hypolithic microbial communities. Finally, although null models for patterns in microbial communities were not supported by experimental data, the amount of unexplained variation (68-97 %) suggests that stochastic processes also play a role in the assembly of such communities in the Namib Desert. en_US
dc.description.librarian hb2013 en_US
dc.description.sponsorship National Research Foundation (South Africa) en_US
dc.description.uri http://www.springerlink.com/content/100494/?p=c2b4bafe07134f2f9c3578c7bc24fe92&pi=681 en_US
dc.identifier.citation Stomeo, F, Valverde, A, Pointing, SB, McKay, CP, Warren-Rhodes, KA, Tuffin, MI, Seely, M & Cowan, DA 2013, 'Hypolithic and soil microbial community assembly along an aridity gradient in the Namib desert', Extremophiles, vol. 17, no. 2, pp. 329-337. en_US
dc.identifier.issn 1431-0651 (print)
dc.identifier.issn 1433-4909 (online)
dc.identifier.other 10.1007/s00792-013-0519-7
dc.identifier.uri http://hdl.handle.net/2263/21381
dc.language.iso en en_US
dc.publisher Springer en_US
dc.rights © Springer-Verlag 2013. The original publication is available at www.springerlink.com en_US
dc.subject Bacteria en_US
dc.subject Cyanobacteria en_US
dc.subject Hypoliths en_US
dc.subject Namib desert en_US
dc.subject Niche en_US
dc.subject Soils en_US
dc.title Hypolithic and soil microbial community assembly along an aridity gradient in the Namib Desert en_US
dc.type Postprint Article en_US


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