Local interactions and self-organized spatial patterns stabilize microbial cross-feeding against cheaters.

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Abstrakt

Tytuł:: Local interactions and self-organized spatial patterns stabilize microbial cross-feeding against cheaters.
Autorzy:: Stump SM; W. K. Kellogg Biological StationBehavior, Michigan State University, 3700 East Gull Lake Drive, Hickory Corners, MI 49060, USA .; School of Forestry and Environmental Studies, Yale University, 195 Prospect Street, New Haven, CT 06511, USA.
Johnson EC; W. K. Kellogg Biological StationBehavior, Michigan State University, 3700 East Gull Lake Drive, Hickory Corners, MI 49060, USA.; Population Biology Graduate Group, University of California, Davis 2320 Storer Hall, One Shields Avenue, Davis, CA 95616, USA.
Klausmeier CA; W. K. Kellogg Biological StationBehavior, Michigan State University, 3700 East Gull Lake Drive, Hickory Corners, MI 49060, USA.; Department of Plant BiologyBehavior, Michigan State University, 3700 East Gull Lake Drive, Hickory Corners, MI 49060, USA.; Program in Ecology, Evolutionary Biology, and Behavior, Michigan State University, 3700 East Gull Lake Drive, Hickory Corners, MI 49060, USA.
Źródło:: Journal of the Royal Society, Interface [J R Soc Interface] 2018 Mar; Vol. 15 (140).
Typ publikacji:: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
Język:: English
Imprint Name(s):: Original Publication: London : Royal Society, [2004]-
MeSH Terms:: Biological Evolution*
Models, Biological*
Microbial Consortia/*physiology
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Contributed Indexing:: Keywords: cross-feeding; multilevel selection; neighbour uncertainty; pattern formation; stochastic spatial model; syntrophy
Entry Date(s):: Date Created: 20180323 Date Completed: 20190626 Latest Revision: 20210109
Update Code:: 20240104
PubMed Central ID:: PMC5908524
DOI:: 10.1098/rsif.2017.0822
PMID:: 29563243
: Czasopismo naukowe

Mutualisms are ubiquitous, but models predict they should be susceptible to cheating. Resolving this paradox has become relevant to synthetic ecology: cooperative cross-feeding, a nutrient-exchange mutualism, has been proposed to stabilize microbial consortia. Previous attempts to understand how cross-feeders remain robust to non-producing cheaters have relied on complex behaviour (e.g. cheater punishment) or group selection. Using a stochastic spatial model, we demonstrate two novel mechanisms that can allow cross-feeders to outcompete cheaters, rather than just escape from them. Both mechanisms work through the spatial segregation of the resources, which prevents individual cheaters from acquiring the resources they need to reproduce. First, if microbe dispersal is low but resources are shared widely, then the cross-feeders self-organize into stable spatial patterns. Here the cross-feeders can build up where the resource they need is abundant, and send their resource to where their partner is, separating resources at regular intervals in space. Second, if dispersal is high but resource sharing is local, then random variation in population density creates small-scale variation in resource density, separating the resources from each other by chance. These results suggest that cross-feeding may be more robust than previously expected and offer strategies to engineer stable consortia.
(© 2018 The Author(s).)

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