The impact of phages on interspecific competition in experimental populations of bacteria |
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| Authors: | Michael A Brockhurst Andrew Fenton Barrie Roulston Paul B Rainey |
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| Affiliation: | (1) Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, UK;(2) School of Biological Sciences, Biosciences Building, University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK;(3) Laboratory of Neurobiology, Wellcome Department of Cognitive Neurology, University College London, Gower Street, London, WC1E 6BT, UK;(4) School of Biological Sciences, University of Auckland, Private Bag, 92019, Auckland, New Zealand |
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| Abstract: | Background Phages are thought to play a crucial role in the maintenance of diversity in natural bacterial communities. Theory suggests that phages impose density dependent regulation on bacterial populations, preventing competitive dominants from excluding less competitive species. To test this, we constructed experimental communities containing two bacterial species (Pseudomonas fluorescens and Pseudomonas aeruginosa) and their phage parasites. Communities were propagated at two environmental temperatures that reversed the outcome of competition in the absence of phage. |
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