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      Bacteria-phage antagonistic coevolution in soil.

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          Abstract

          Bacteria and their viruses (phages) undergo rapid coevolution in test tubes, but the relevance to natural environments is unclear. By using a "mark-recapture" approach, we showed rapid coevolution of bacteria and phages in a soil community. Unlike coevolution in vitro, which is characterized by increases in infectivity and resistance through time (arms race dynamics), coevolution in soil resulted in hosts more resistant to their contemporary than past and future parasites (fluctuating selection dynamics). Fluctuating selection dynamics, which can potentially continue indefinitely, can be explained by fitness costs constraining the evolution of high levels of resistance in soil. These results suggest that rapid coevolution between bacteria and phage is likely to play a key role in structuring natural microbial communities.

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          Author and article information

          Journal
          Science
          Science (New York, N.Y.)
          American Association for the Advancement of Science (AAAS)
          1095-9203
          0036-8075
          Apr 01 2011
          : 332
          : 6025
          Affiliations
          [1 ] Department of Zoology, University of Oxford, Oxford OX1 3PS, UK. pedro.gomezlopez@zoo.ox.ac.uk
          Article
          332/6025/106
          10.1126/science.1198767
          21454789
          cf4e51c4-fa5d-4728-9105-926842e50553
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