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dc.contributor.authorMiller, Tom E.X.
Rudgers, Jennifer A.
dc.date.accessioned 2014-03-28T21:55:02Z
dc.date.available 2014-03-28T21:55:02Z
dc.date.issued 2014-04
dc.identifier.citation Miller, Tom E.X. and Rudgers, Jennifer A.. "Niche Differentiation in the Dynamics of Host-Symbiont Interactions: Symbiont Prevalence as a Coexistence Problem." The American Naturalist, 183, no. 4 (2014) The University of Chicago Press: 506-518. http://dx.doi.org/10.1086/675394.
dc.identifier.urihttps://hdl.handle.net/1911/75785
dc.description.abstract Heritable symbioses can have important ecological effects and have triggered important evolutionary innovations. Current predictions for long-term symbiont prevalence are based on their fitness benefits and vertical transmission rates but ignore nonlinear competitive feedbacks among symbiotic and symbiont-free hosts. We hypothesized that such feedbacks function as stabilizing mechanisms, promoting coexistence of host types and maintaining intermediate symbiont frequency at the population scale. Using a model grass/endophyte symbiosis, we manipulated competition within and between endophyte-symbiotic (E+) and endophyte-free (E-) hosts and fit competition models to experimental data. We show for the first time that symbiont-structured competition can generate stable coexistence of E+ and E- hosts, even under perfect vertical transmission. Niche differentiation was the key to coexistence, causing hosts of each type to limit themselves more strongly than each other. These results establish roles for nonlinear competitive dynamics and niche differentiation in the ecology and evolution of heritable symbionts.
dc.language.iso eng
dc.publisher The University of Chicago Press
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Niche Differentiation in the Dynamics of Host-Symbiont Interactions: Symbiont Prevalence as a Coexistence Problem
dc.type Journal article
dc.contributor.funder National Science Foundation
dc.citation.journalTitle The American Naturalist
dc.subject.keywordcompetitive coexistence
ecological niche
host-symbiont interactions
vertical transmission
dc.citation.volumeNumber 183
dc.citation.issueNumber 4
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1086/675394
dc.identifier.grantID DEB-1145588 (National Science Foundation)
dc.type.publication publisher version
dc.citation.firstpage 506
dc.citation.lastpage 518


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