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An experimental model for the spatial structuring and selection of bacterial communities


Thomas, T and Kindinger, I and Yu, D and Esvaran, M and Blackall, L and Forehead, HI and Johnson, CR and Manefield, M, An experimental model for the spatial structuring and selection of bacterial communities, Journal of Microbiological Methods, 87, (2) pp. 165-168. ISSN 0167-7012 (2011) [Refereed Article]

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DOI: doi:10.1016/j.mimet.2011.08.010


Community-level selection is an important concept in evolutionary biology and has been predicted to arise in systems that are spatially structured. Here we develop an experimental model for spatially-structured bacterial communities based on coaggregating strains and test their relative fitness under a defined selection pressure. As selection we apply protozoan grazing in a defined, continuous culturing system. We demonstrate that a slow-growing bacterial strain Blastomonas natatoria 2.1, which forms coaggregates with Micrococcus luteus, can outcompete a fast-growing, closely related strain Blastomonas natatoria 2.8 under conditions of protozoan grazing. The competitive benefit provided by spatial structuring has implications for the evolution of natural bacterial communities in the environment.

Item Details

Item Type:Refereed Article
Keywords:Community, Spatial structure, Coaggregation, Protozoan grazing
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Community ecology (excl. invasive species ecology)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Forehead, HI (Dr Hugh Forehead)
UTAS Author:Johnson, CR (Professor Craig Johnson)
ID Code:76602
Year Published:2011
Web of Science® Times Cited:2
Deposited By:IMAS Research and Education Centre
Deposited On:2012-03-08
Last Modified:2017-11-03

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