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  Evolutionary contribution to coexistence of competitors in microbial food webs

Hiltunen, T., Kaitala, V., Laakso, J., & Becks, L. (2017). Evolutionary contribution to coexistence of competitors in microbial food webs. Proceedings of the Royal Society B: Biological Sciences, 284(1864): 20170415. doi:10.1098/rspb.2017.0415.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-257E-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-7EED-8
Genre: Journal Article

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 Creators:
Hiltunen, T., Author
Kaitala, V., Author
Laakso, J., Author
Becks, L.1, Author              
Affiliations:
1Emmy-Noether-Group Community Dynamics, Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_2068285              

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Free keywords: Community dynamics, Eco-evolutionary dynamics, Experimental evolution, Interaction, Pseudomonas fluorescens SBW25, Tetrahymena thermophila, Bacteria (microorganisms), Protozoa, Pseudomonas fluorescens, Tetrahymena thermophila
 Abstract: The theory of species coexistence is a key concept in ecology that has received much attention. The role of rapid evolution for determining species coexistence is still poorly understood although evolutionary change on ecological timescales has the potential to change almost any ecological process. The influence of evolution on coexistence can be especially pronounced in microbial communities where organisms often have large population sizes and short generation times. Previous work on coexistence has assumed that traits involved in resource use and species interactions are constant or change very slowly in terms of ecological time-scales. However, recent work suggests that these traits can evolve rapidly. Nevertheless, the importance of rapid evolution to coexistence has not been tested experimentally. Here, we show how rapid evolution alters the frequency of two bacterial competitors over time when grown together with specialist consumers (bacteriophages), a generalist consumer (protozoan) and all in combination. We find that consumers facilitate coexistence in a manner consistent with classic ecological theory. However, through disentangling the relative contributions of ecology (changes in consumer abundance) and evolution (changes in traits mediating species interactions) on the frequency of the two competitors over time,we find differences between the consumer types and combinations. Overall, our results indicate that the influence of evolution on species coexistence strongly depends on the traits and species interactions considered. © 2017 The Author(s) Published by the Royal Society. All rights reserved.

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Language(s): eng - English
 Dates: 2017-02-272017-09-082017-10-112017
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
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Title: Proceedings of the Royal Society B: Biological Sciences
  Abbreviation : Proc. R. Soc. B
Source Genre: Journal
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Publ. Info: London : Royal Society
Pages: 8 Volume / Issue: 284 (1864) Sequence Number: 20170415 Start / End Page: - Identifier: ISSN: 0962-8452
CoNE: /journals/resource/110975500577295_2