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Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity

Selection and dispersal are ecological processes that have contrasting roles in the assembly of communities. Variable selection diversifies and strong dispersal homogenizes them. However, we do not know whether dispersal homogenizes communities directly via immigration or indirectly via weakening se...

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Autores principales: Fodelianakis, Stilianos, Lorz, Alexander, Valenzuela-Cuevas, Adriana, Barozzi, Alan, Booth, Jenny Marie, Daffonchio, Daniele
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6428813/
https://www.ncbi.nlm.nih.gov/pubmed/30899017
http://dx.doi.org/10.1038/s41467-019-09306-7
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author Fodelianakis, Stilianos
Lorz, Alexander
Valenzuela-Cuevas, Adriana
Barozzi, Alan
Booth, Jenny Marie
Daffonchio, Daniele
author_facet Fodelianakis, Stilianos
Lorz, Alexander
Valenzuela-Cuevas, Adriana
Barozzi, Alan
Booth, Jenny Marie
Daffonchio, Daniele
author_sort Fodelianakis, Stilianos
collection PubMed
description Selection and dispersal are ecological processes that have contrasting roles in the assembly of communities. Variable selection diversifies and strong dispersal homogenizes them. However, we do not know whether dispersal homogenizes communities directly via immigration or indirectly via weakening selection across habitats due to physical transfer of material, e.g., water mixing in aquatic ecosystems. Here we examine how dispersal homogenizes a simplified synthetic bacterial metacommunity, using a sequencing-independent approach based on flow cytometry and mathematical modeling. We show that dispersal homogenizes the metacommunity via immigration, not via weakening selection, and even when immigration is four times slower than growth. This finding challenges the current view that dispersal homogenizes communities only at high rates and explains why communities are homogeneous at small spatial scales. It also offers a benchmark for sequence-based studies in natural microbial communities where immigration rates can be inferred solely by using neutral models.
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spelling pubmed-64288132019-03-25 Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity Fodelianakis, Stilianos Lorz, Alexander Valenzuela-Cuevas, Adriana Barozzi, Alan Booth, Jenny Marie Daffonchio, Daniele Nat Commun Article Selection and dispersal are ecological processes that have contrasting roles in the assembly of communities. Variable selection diversifies and strong dispersal homogenizes them. However, we do not know whether dispersal homogenizes communities directly via immigration or indirectly via weakening selection across habitats due to physical transfer of material, e.g., water mixing in aquatic ecosystems. Here we examine how dispersal homogenizes a simplified synthetic bacterial metacommunity, using a sequencing-independent approach based on flow cytometry and mathematical modeling. We show that dispersal homogenizes the metacommunity via immigration, not via weakening selection, and even when immigration is four times slower than growth. This finding challenges the current view that dispersal homogenizes communities only at high rates and explains why communities are homogeneous at small spatial scales. It also offers a benchmark for sequence-based studies in natural microbial communities where immigration rates can be inferred solely by using neutral models. Nature Publishing Group UK 2019-03-21 /pmc/articles/PMC6428813/ /pubmed/30899017 http://dx.doi.org/10.1038/s41467-019-09306-7 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Fodelianakis, Stilianos
Lorz, Alexander
Valenzuela-Cuevas, Adriana
Barozzi, Alan
Booth, Jenny Marie
Daffonchio, Daniele
Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity
title Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity
title_full Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity
title_fullStr Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity
title_full_unstemmed Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity
title_short Dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity
title_sort dispersal homogenizes communities via immigration even at low rates in a simplified synthetic bacterial metacommunity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6428813/
https://www.ncbi.nlm.nih.gov/pubmed/30899017
http://dx.doi.org/10.1038/s41467-019-09306-7
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