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Differential impact of simultaneous migration on coevolving hosts and parasites

Morgan, Andrew D; Brockhurst, Michael A; Lopez-Pascua, Laura DC; Pal, Csaba and Buckling, Angus (2007) Differential impact of simultaneous migration on coevolving hosts and parasites. BMC Evolutionary Biology, 7 . Article Number: 1. ISSN 1471-2148

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Abstract

Background: The dynamics of antagonistic host-parasite coevolution are believed to be crucially dependent on the rate of migration between populations. We addressed how the rate of simultaneous migration of host and parasite affected resistance and infectivity evolution of coevolving meta-populations of the bacterium Pseudomonas fluorescens and a viral parasite (bacteriophage). The increase in genetic variation resulting from small amounts of migration is expected to increase rates of adaptation of both host and parasite. However, previous studies suggest phages should benefit more from migration than bacteria; because in the absence of migration, phages are more genetically limited and have a lower evolutionary potential compared to the bacteria. Results: The results supported the hypothesis: migration increased the resistance of bacteria to their local (sympatric) hosts. Moreover, migration benefited phages more than hosts with respect to 'global' (measured with respect to the whole range of migration regimes) patterns of resistance and infectivity, because of the differential evolutionary responses of bacteria and phage to different migration regimes. Specifically, we found bacterial global resistance peaked at intermediate rates of migration, whereas phage global infectivity plateaued when migration rates were greater than zero. Conclusion: These results suggest that simultaneous migration of hosts and parasites can dramatically affect the interaction of host and parasite. More specifically, the organism with the lower evolutionary potential may gain the greater evolutionary advantage from migration.

Item Type:Article
Additional Information:Published: 10 January 2007. 8 pages (page numbers not for citation purposes).
Uncontrolled Keywords:GENE-FOR-GENE; LOCAL ADAPTATION; ANTAGONISTIC COEVOLUTION; BACTERIOPHAGE; EVOLUTION; DIVERSIFICATION; POPULATIONS; VIRULENCE; SYSTEM; MODEL
Subjects:Q Science > QH Natural history > QH301 Biology
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Biological Sciences
DOI:10.1186/1471-2148-7-1
Publisher's Statement:© 2007 Morgan et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Related URLs:
Refereed:Yes
Status:Published
ID Code:747
Deposited On:27 Jun 2008 15:21
Last Modified:19 May 2011 20:45

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