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Temporal dynamics of a simple community with intraguild predation: an experimental test

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dc.contributor.authorHiltunen, T.
dc.contributor.authorJones, L. E.
dc.contributor.authorEllner, S. P.
dc.contributor.authorHairston, Nelson G., Jr.
dc.date.accessioned2018-05-31T20:53:00Z
dc.date.available2018-05-31T20:53:00Z
dc.date.issued2013-04
dc.description.abstractWe explore how adding complexity to a typical predator-prey interaction affects temporal dynamics. Intraguild predation webs contain competition, predation, and omnivory in a system of three species where theory and empirical results can be compared. We studied a planktonic microcosm community in which an alga is consumed by a flagellate and by a rotifer that also consumes the flagellate. Previously published theory predicts that phase lags between the species are the outcome of a "tug of war" among the intraguild-predation links: rotifers-algae, flagellates-algae, and rotifers-flagellates. We observed sustained oscilltions with abundance peaks that corresponded exactly to theoretical predictions in all replicates: peaks of the rotifers and flagellates fell on either side of a quarter-period lag behind the prey (algae) peaks, with the peak of the intermediate predator (flagellates) preceding that of the top predator (rotifers). The phase lags in these experiments suggest that temporal variation in flagellate growth rate is primarily driven by variation in the intensity of its consumption by rotifers, rather than by variation in the density of its algal prey. This system illustrates how interaction strength affects the pattern of intraguild predation cycles and provides an opportunity to explore how evolution of interaction strength may affect those dynamics.
dc.identifier.citationEcology (2013) 94:773-779
dc.identifier.urihttps://hdl.handle.net/1813/57252
dc.language.isoen
dc.publisherEcological Society of America
dc.relation.doihttps://doi.org/10.1890/12-0786.1
dc.subjectalgae
dc.subjectBrachionus plicatilis
dc.subjectchemostat
dc.subjectChlorella autrophica
dc.subjectflagellates
dc.subjectintermediate predator
dc.subjectlaboratory microcosm
dc.subjectmathematical models
dc.subjectOxyrrhis marina
dc.subjectpredator-prey dynamics
dc.subjectrotifers
dc.subjecttri-trophic food web
dc.titleTemporal dynamics of a simple community with intraguild predation: an experimental test
dc.typearticle
dcterms.licensehttp://hdl.handle.net/1813/57207

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