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dc.contributor.authorGómez, Pedro
dc.contributor.authorAshby, Ben
dc.contributor.authorBuckling, Angus
dc.date.accessioned2014-12-22T10:26:09Z
dc.date.issued2015-01-07
dc.description.abstractThe consequences of host-parasite coevolution are highly contingent on the qualitative coevolutionary dynamics: whether selection fluctuates (fluctuating selection dynamic; FSD), or is directional towards increasing infectivity/resistance (arms race dynamic; ARD). Both genetics and ecology can play an important role in determining whether coevolution follows FSD or ARD, but the ecological conditions under which FSD shifts to ARD, and vice versa, are not well understood. The degree of population mixing is thought to increase host exposure to parasites, hence selecting for greater resistance and infectivity ranges, and we hypothesize this promotes ARD. We tested this by coevolving bacteria and viruses in soil microcosms and found that population mixing shifted bacteria-virus coevolution from FSD to ARD. A simple theoretical model produced qualitatively similar results, showing that mechanisms that increase host exposure to parasites tend to push dynamics towards ARD. The shift from FSD to ARD with increased population mixing may help to explain variation in coevolutionary dynamics between different host-parasite systems, and more specifically the observed discrepancies between laboratory and field bacteria-virus coevolutionary studies.
dc.description.sponsorshipNatural Environment Research Council (NERC)
dc.description.sponsorshipMarie Curie Intra-European Fellowship (FP7)
dc.description.sponsorshipThe Royal Society
dc.identifier.citationJanuary 2015, Volume: 282 Issue: 1798
dc.identifier.doi10.1098/rspb.2014.2297
dc.identifier.grantnumberPIEF-GA-2010–272945
dc.identifier.otherrspb.2014.2297
dc.identifier.urihttp://hdl.handle.net/10871/16096
dc.language.isoeng
dc.publisherThe Royal Society
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pubmed/25429018
dc.relation.urlhttp://rspb.royalsocietypublishing.org/content/282/1798/20142297
dc.rightsCC-BY
dc.subjectPseudomonas fluorescens
dc.subjectantagonistic coevolution
dc.subjectarms race dynamic
dc.subjectbacteriophages
dc.subjectfluctuating selection dynamic
dc.subjectmixing
dc.titlePopulation mixing promotes arms race host-parasite coevolution.
dc.typeArticle
dc.date.available2014-12-22T10:26:09Z
exeter.place-of-publicationEngland
dc.descriptionOpen access article. Please cite the published version available on the Royal Society web site by following the DOI above.
dc.identifier.journalProceedings of the Royal Society of London B: Biological Sciences


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