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Saturating effects of species diversity on life-history evolution in bacteria

Species interactions can play a major role in shaping evolution in new environments. In theory, species interactions can either stimulate evolution by promoting coevolution or inhibit evolution by constraining ecological opportunity. The relative strength of these effects should vary as species rich...

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Autores principales: Fiegna, Francesca, Scheuerl, Thomas, Moreno-Letelier, Alejandra, Bell, Thomas, Barraclough, Timothy G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4614762/
https://www.ncbi.nlm.nih.gov/pubmed/26378213
http://dx.doi.org/10.1098/rspb.2015.1794
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author Fiegna, Francesca
Scheuerl, Thomas
Moreno-Letelier, Alejandra
Bell, Thomas
Barraclough, Timothy G.
author_facet Fiegna, Francesca
Scheuerl, Thomas
Moreno-Letelier, Alejandra
Bell, Thomas
Barraclough, Timothy G.
author_sort Fiegna, Francesca
collection PubMed
description Species interactions can play a major role in shaping evolution in new environments. In theory, species interactions can either stimulate evolution by promoting coevolution or inhibit evolution by constraining ecological opportunity. The relative strength of these effects should vary as species richness increases, and yet there has been little evidence for evolution of component species in communities. We evolved bacterial microcosms containing between 1 and 12 species in three different environments. Growth rates and yields of isolates that evolved in communities were lower than those that evolved in monocultures, consistent with recent theory that competition constrains species to specialize on narrower sets of resources. This effect saturated or reversed at higher levels of richness, consistent with theory that directional effects of species interactions should weaken in more diverse communities. Species varied considerably, however, in their responses to both environment and richness levels. Mechanistic models and experiments are now needed to understand and predict joint evolutionary dynamics of species in diverse communities.
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spelling pubmed-46147622015-11-02 Saturating effects of species diversity on life-history evolution in bacteria Fiegna, Francesca Scheuerl, Thomas Moreno-Letelier, Alejandra Bell, Thomas Barraclough, Timothy G. Proc Biol Sci Research Articles Species interactions can play a major role in shaping evolution in new environments. In theory, species interactions can either stimulate evolution by promoting coevolution or inhibit evolution by constraining ecological opportunity. The relative strength of these effects should vary as species richness increases, and yet there has been little evidence for evolution of component species in communities. We evolved bacterial microcosms containing between 1 and 12 species in three different environments. Growth rates and yields of isolates that evolved in communities were lower than those that evolved in monocultures, consistent with recent theory that competition constrains species to specialize on narrower sets of resources. This effect saturated or reversed at higher levels of richness, consistent with theory that directional effects of species interactions should weaken in more diverse communities. Species varied considerably, however, in their responses to both environment and richness levels. Mechanistic models and experiments are now needed to understand and predict joint evolutionary dynamics of species in diverse communities. The Royal Society 2015-09-22 /pmc/articles/PMC4614762/ /pubmed/26378213 http://dx.doi.org/10.1098/rspb.2015.1794 Text en © 2015 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Research Articles
Fiegna, Francesca
Scheuerl, Thomas
Moreno-Letelier, Alejandra
Bell, Thomas
Barraclough, Timothy G.
Saturating effects of species diversity on life-history evolution in bacteria
title Saturating effects of species diversity on life-history evolution in bacteria
title_full Saturating effects of species diversity on life-history evolution in bacteria
title_fullStr Saturating effects of species diversity on life-history evolution in bacteria
title_full_unstemmed Saturating effects of species diversity on life-history evolution in bacteria
title_short Saturating effects of species diversity on life-history evolution in bacteria
title_sort saturating effects of species diversity on life-history evolution in bacteria
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4614762/
https://www.ncbi.nlm.nih.gov/pubmed/26378213
http://dx.doi.org/10.1098/rspb.2015.1794
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