Hall, J., Harrison, E.A. and Brockhurst, M.A. (2018) Competitive species interactions constrain abiotic adaptation in a bacterial soil community. Evolution Letters. ISSN 2056-3744
Abstract
Studies of abiotic adaptation often consider single species in isolation, yet natural communities contain many coexisting species which could limit or promote abiotic adaptation. Here we show, using soil bacterial communities, that evolving in the presence of a competitor constrained abiotic adaptation. Specifically, Pseudomonas fluorescens evolved alone was fitter than P. fluorescens evolved alongside Pseudomonas putida, when P. putida was absent. Genome analyses indicated this was due to mutation of the acetate scavenger actP, which occurred exclusively, and almost universally, in single‐species‐evolved clones. actP disruption was associated with increased growth in soil compared with wild‐type actP, but this benefit was abolished when P. putida was present, suggesting a role for carbon scavenging transporters in species interactions, possibly through nutrient competition. Our results show that competitive species interactions can limit the evolutionary response to abiotic selection, because the fitness benefits of abiotic adaptive mutations were negated in more complex communities.
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Copyright, Publisher and Additional Information: | © 2018, Society for the Study of Evolution. This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | ||||||
Keywords: | Adaptation; competition; experimental evolution; nutrient scavenging; Pseudomonas fluorescens; soil microbiology | ||||||
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Institution: | The University of Sheffield | ||||||
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Biosciences (Sheffield) > Department of Animal and Plant Sciences (Sheffield) | ||||||
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Depositing User: | Symplectic Sheffield | ||||||
Date Deposited: | 28 Sep 2018 14:10 | ||||||
Last Modified: | 13 Nov 2018 10:07 | ||||||
Published Version: | https://doi.org/10.1002/evl3.83 | ||||||
Status: | Published online | ||||||
Publisher: | Wiley Open Access | ||||||
Refereed: | Yes | ||||||
Identification Number: | https://doi.org/10.1002/evl3.83 | ||||||
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