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dc.contributor.authorDeLong, JPen_US
dc.contributor.authorGilbert, Ben_US
dc.contributor.authorShurin, JBen_US
dc.contributor.authorSavage, VMen_US
dc.contributor.authorBarton, BTen_US
dc.contributor.authorClements, CFen_US
dc.contributor.authorDell, AIen_US
dc.contributor.authorGreig, HSen_US
dc.contributor.authorHarley, CDGen_US
dc.contributor.authorKratina, Pen_US
dc.contributor.authorMcCann, KSen_US
dc.contributor.authorTunney, TDen_US
dc.contributor.authorVasseur, DAen_US
dc.contributor.authorO'Connor, MIen_US
dc.description.abstractTrophic cascades are indirect positive effects of predators on resources via control of intermediate consumers. Larger-bodied predators appear to induce stronger trophic cascades (a greater rebound of resource density toward carrying capacity), but how this happens is unknown because we lack a clear depiction of how the strength of trophic cascades is determined. Using consumer resource models, we first show that the strength of a trophic cascade has an upper limit set by the interaction strength between the basal trophic group and its consumer and that this limit is approached as the interaction strength between the consumer and its predator increases. We then express the strength of a trophic cascade explicitly in terms of predator body size and use two independent parameter sets to calculate how the strength of a trophic cascade depends on predator size. Both parameter sets predict a positive effect of predator size on the strength of a trophic cascade, driven mostly by the body size dependence of the interaction strength between the first two trophic levels. Our results support previous empirical findings and suggest that the loss of larger predators will have greater consequences on trophic control and biomass structure in food webs than the loss of smaller predators.en_US
dc.format.extent354 - 366en_US
dc.relation.ispartofAm Naten_US
dc.subjectBody Sizeen_US
dc.subjectConservation of Natural Resourcesen_US
dc.subjectFood Chainen_US
dc.subjectModels, Theoreticalen_US
dc.subjectPredatory Behavioren_US
dc.titleThe body size dependence of trophic cascades.en_US
pubs.notesNo embargoen_US

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