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  Environmental fluctuations restrict eco-evolutionary dynamics in predator–prey system

Hiltunen, T., Ayan, G. B., & Becks, L. (2015). Environmental fluctuations restrict eco-evolutionary dynamics in predator–prey system. Proceedings of the Royal Society B: Biological Sciences, 282(1808): 20150013. doi:10.1098/rspb.2015.0013.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-8250-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-8251-A
Genre: Journal Article

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Hiltunen_Ayan_Becks_2015.pdf (Publisher version), 359KB
 
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 Creators:
Hiltunen, Teppo, Author
Ayan, Gökce B.1, Author              
Becks, Lutz1, Author              
Affiliations:
1Research Group Community Dynamics, Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445642              

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Free keywords: community dynamics; coevolution; eco-evolutionary dynamics; temporal fluctuations; Tetrahymena thermophila; Pseudomonas fluorescens SBW25
 Abstract: Environmental fluctuations, species interactions and rapid evolution are all predicted to affect community structure and their temporal dynamics. Although the effects of the abiotic environment and prey evolution on ecological community dynamics have been studied separately, these factors can also have interactive effects. Herewe used bacteria–ciliate microcosm experiments to test for eco-evolutionary dynamics in fluctuating environments. Specifically, we followed population dynamics and a prey defence trait over time when populations were exposed to regular changes of bottom-up or topdown stressors, or combinations of these. We found that the rate of evolution of a defence trait was significantly lower in fluctuating compared with stable environments, and that the defence trait evolved to lower levels when two environmental stressors changed recurrently. The latter suggests that top-down and bottom-up changes can have additive effects constraining evolutionary response within populations. The differences in evolutionary trajectories are explained by fluctuations in population sizes of the prey and the predator, which continuously alter the supply of mutations in the prey and strength of selection through predation. Thus, it may be necessary to adopt an eco-evolutionary perspective on studies concerning the evolution of traits mediating species interactions.

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Language(s): eng - English
 Dates: 2015-01-042015-04-212015-05-20
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1098/rspb.2015.0013
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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: 7 S. Volume / Issue: 282 (1808) Sequence Number: 20150013 Start / End Page: - Identifier: ISSN: 0962-8452
CoNE: /journals/resource/110975500577295_2