2016
DOI: 10.1890/15-0305.1
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Competition‐mediated feedbacks in experimental multispecies epizootics

Abstract: Competition structures ecological communities and alters host–pathogen interactions. In environmentally transmitted pathogens, an infection‐resistant competitor may influence infection dynamics in a susceptible species through the negative impacts of competition (e.g., by reducing host density or causing nutritional stress that increases susceptibility to infection) and/or the positive impacts of reducing transmission efficiency (e.g., by removing environmental pathogen stages). Thus, a non‐susceptible competi… Show more

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Cited by 13 publications
(10 citation statements)
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“…Here, it likely reflects the length of our experiment, metric of disease considered, and traits of diluters. As noted above, host regulation became more important than encounter reduction during other multi‐generational experiments (Dallas et al., ; Johnson, Rohr, et al., ; Mitchell et al., ) and models (Ogden & Tsao, ). In contrast, shorter experiments might only allow effects of encounter reduction to manifest.…”
Section: Discussionmentioning
confidence: 93%
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“…Here, it likely reflects the length of our experiment, metric of disease considered, and traits of diluters. As noted above, host regulation became more important than encounter reduction during other multi‐generational experiments (Dallas et al., ; Johnson, Rohr, et al., ; Mitchell et al., ) and models (Ogden & Tsao, ). In contrast, shorter experiments might only allow effects of encounter reduction to manifest.…”
Section: Discussionmentioning
confidence: 93%
“…However, these weakly competing focal hosts were driven extinct in some tanks. From the perspective of the focal host, this risk of extinction emphasizes a darker side of competition during epidemics (see also Dallas et al., ). Moreover, because diluters impacted disease primarily through host regulation (rather than encounter reduction), the dilution effect here was tightly linked to the density cost of competition.…”
Section: Discussionmentioning
confidence: 99%
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“…Different clonal lines of D. pulicaria have also demonstrated this resistance ( unpublished data , and Dallas et al. in press). Our ability to make broad generalizations about the relationship between host species susceptibility and resistance costs is limited by the examination of single representative clones of each Daphnia species.…”
Section: Discussionmentioning
confidence: 82%