Farming and public goods production in populations.

TitleFarming and public goods production in populations.
Publication TypeJournal Article
Year of Publication2017
AuthorsThutupalli, S, Uppaluri, S, Constable, GWA, Levin, SA, Stone, HA, Tarnita, CE, Brangwynne, CP
JournalProc Natl Acad Sci U S A
Volume114
Issue9
Pagination2289-2294
Date Published2017 02 28
ISSN1091-6490
KeywordsAnimals, Bacterial Load, Caenorhabditis elegans, Escherichia coli, Genes, Reporter, Green Fluorescent Proteins, Locomotion, Microbial Viability, Molecular Imaging, Organisms, Genetically Modified, Population Density, Population Dynamics, Symbiosis
Abstract

<p>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 - (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 , 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.</p>

DOI10.1073/pnas.1608961114
Alternate JournalProc. Natl. Acad. Sci. U.S.A.
PubMed ID28183799
PubMed Central IDPMC5338499
Grant ListDP2 GM105437 / GM / NIGMS NIH HHS / United States
P40 OD010440 / OD / NIH HHS / United States