Cannibalism and Intraguild Predation Community Dynamics: Coexistence, Competitive Exclusion, and the Loss of Alternative Stable States

Simple item page
dc.citation.issueNumber5en_US
dc.citation.journalTitleThe American Naturalisten_US
dc.citation.volumeNumber190en_US
dc.contributor.authorToscano, Benjamin J.en_US
dc.contributor.authorHin, Vincenten_US
dc.contributor.authorRudolf, Volker H.W.en_US
dc.date.accessioned2017-10-27T15:22:49Zen_US
dc.date.available2017-10-27T15:22:49Zen_US
dc.date.issued2017en_US
dc.description.abstractPredators often exert strong top-down regulation of prey, but in many systems, juvenile predators must compete with their future prey for a shared resource. In such life-history intraguild predation (LHIGP) systems, prey can therefore also regulate the recruitment and thus population dynamics of their predator via competition. Theory predicts that such stage-structured systems exhibit a wide range of dynamics, including alternative stable states. Here we show that cannibalism is an exceedingly common interaction within natural LHIGP systems that determines what coexistence states are possible. Using a modeling approach that simulates a range of ontogenetic diet shift scenarios along a productivity gradient, we demonstrate that only if the predator is competitively dominant can cannibalism promote coexistence by allowing prey to persist. If the prey is competitively dominant, cannibalism instead results in competitive exclusion of the predator and the loss of potential alternative stable states. Further, predator exclusion occurs at low cannibalistic preference relative to empirical estimates and is consistent across LHIGP systems in which the predator undergoes a complete diet shift or diet broadening over ontogeny. Given that prey is frequently competitively dominant in natural systems, our results demonstrate that even weak cannibalism can inhibit predator persistence, prompting exploration of mechanisms that reconcile theory with the common occurrence of such interactions in nature.en_US
dc.identifier.citationToscano, Benjamin J., Hin, Vincent and Rudolf, Volker H.W.. "Cannibalism and Intraguild Predation Community Dynamics: Coexistence, Competitive Exclusion, and the Loss of Alternative Stable States." <i>The American Naturalist,</i> 190, no. 5 (2017) The University of Chicago Press: https://doi.org/10.1086/693997.en_US
dc.identifier.doihttps://doi.org/10.1086/693997en_US
dc.identifier.urihttps://hdl.handle.net/1911/97822en_US
dc.language.isoengen_US
dc.publisherThe University of Chicago Pressen_US
dc.rightsArticle 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.en_US
dc.subject.keyworddensity dependenceen_US
dc.subject.keywordindirect interactionsen_US
dc.subject.keywordmixed interactionsen_US
dc.subject.keywordomnivoryen_US
dc.subject.keywordontogenetic niche shiften_US
dc.titleCannibalism and Intraguild Predation Community Dynamics: Coexistence, Competitive Exclusion, and the Loss of Alternative Stable Statesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
CommunityDynamics.pdf
Size:
591.48 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
BioSciences Publications