Farming and public goods production in Caenorhabditis elegans populations

Shashi Thutupalli, Sravanti Uppaluri, George W. A. Constable, Simon A. Levin, Howard A. Stone, Corina E. Tarnita, Clifford P. Brangwynne

Research output: Contribution to journalArticle

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Abstract

The ecological and evolutionary dynamics of populations are shaped by the strategies they use to produce and use resources. However, our understanding of the interplay between the genetic, behavioral, and environmental factors driving these strategies is limited. Here, we report on a Caenorhabditis elegans–Escherichia coli (worm–bacteria) experimental system in which the worm-foraging behavior leads to a redistribution of the bacterial food source, resulting in a growth advantage for both organisms, similar to that achieved via farming. We show experimentally and theoretically that the increased resource growth represents a public good that can benefit all other consumers, regardless of whether or not they are producers. Mutant worms that cannot farm bacteria benefit from farming by other worms in direct proportion to the fraction of farmers in the worm population. The farming behavior can therefore be exploited if it is associated with either energetic or survival costs. However, when the individuals compete for resources with their own type, these costs can result in an increased population density. Altogether, our findings reveal a previously unrecognized mechanism of public good production resulting from the foraging behavior of C. elegans, which has important population-level consequences. This powerful system may provide broad insight into exploration–exploitation tradeoffs, the resultant ecoevolutionary dynamics, and the underlying genetic and neurobehavioral driving forces of multispecies interactions.
LanguageEnglish
Pages2289-2294
JournalProceedings of the National Academy of Sciences
Volume114
Issue number9
Early online date9 Feb 2017
DOIs
StatusPublished - 28 Feb 2017

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Caenorhabditis elegans
Agriculture
Population
Behavioral Genetics
Bacteria
Costs and Cost Analysis
Population Dynamics
Growth
Population Density
Escherichia coli
Food

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Thutupalli, S., Uppaluri, S., Constable, G. W. A., Levin, S. A., Stone, H. A., Tarnita, C. E., & Brangwynne, C. P. (2017). Farming and public goods production in Caenorhabditis elegans populations. Proceedings of the National Academy of Sciences, 114(9), 2289-2294. https://doi.org/10.1073/pnas.1608961114

Farming and public goods production in Caenorhabditis elegans populations. / Thutupalli, Shashi; Uppaluri, Sravanti; Constable, George W. A.; Levin, Simon A.; Stone, Howard A.; Tarnita, Corina E.; Brangwynne, Clifford P.

In: Proceedings of the National Academy of Sciences, Vol. 114, No. 9, 28.02.2017, p. 2289-2294.

Research output: Contribution to journalArticle

Thutupalli, S, Uppaluri, S, Constable, GWA, Levin, SA, Stone, HA, Tarnita, CE & Brangwynne, CP 2017, 'Farming and public goods production in Caenorhabditis elegans populations' Proceedings of the National Academy of Sciences, vol. 114, no. 9, pp. 2289-2294. https://doi.org/10.1073/pnas.1608961114
Thutupalli, Shashi ; Uppaluri, Sravanti ; Constable, George W. A. ; Levin, Simon A. ; Stone, Howard A. ; Tarnita, Corina E. ; Brangwynne, Clifford P. / Farming and public goods production in Caenorhabditis elegans populations. In: Proceedings of the National Academy of Sciences. 2017 ; Vol. 114, No. 9. pp. 2289-2294.
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