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dc.contributor.authorCosta-Pereira, Raul
Araújo, Márcio Silva
Olivier, Renan da Silva
Souza, Franco L.
Rudolf, Volker H.W.
dc.date.accessioned 2018-11-01T19:40:03Z
dc.date.available 2018-11-01T19:40:03Z
dc.date.issued 2018
dc.identifier.citation Costa-Pereira, Raul, Araújo, Márcio Silva, Olivier, Renan da Silva, et al.. "Prey Limitation Drives Variation in Allometric Scaling of Predator-Prey Interactions." The American Naturalist, 192, no. 4 (2018) The University of Chicago Press: E139-E149. https://doi.org/10.1086/698726.
dc.identifier.urihttps://hdl.handle.net/1911/103277
dc.description.abstract Ecologists have long searched for a universal size-scaling constant that governs trophic interactions. Although this is an appealing theoretical concept, predator-prey size ratios (PPSRs) vary strikingly across and within natural food webs, meaning that predators deviate from their optimal prey size by consuming relatively larger or smaller prey. Here we suggest that this unexpected variation in allometric scaling of trophic interactions can be predicted by gradients of prey limitation consistent with predictions from optimal foraging theory. We analyzed >6,000 trophic interactions of 52 populations from four tropical frog species along a gradient of prey limitation. The mean of PPSR and its variance differed up to two orders of magnitude across and within food webs. Importantly, as prey availability decreased across food webs, PPSR and its variance became more size dependent. Thus, trophic interactions did not follow a fixed allometric scaling but changed predictably with the strength of prey limitation. Our results emphasize the importance of ecological contexts in arranging food webs and the need to incorporate ecological drivers of PPSR and its variance in food web and community models.
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 Prey Limitation Drives Variation in Allometric Scaling of Predator-Prey Interactions
dc.type Journal article
dc.citation.journalTitle The American Naturalist
dc.subject.keywordfood web
predator-prey mass ratio
predator-prey size ratio
prey availability
size scaling
trophic interactions
dc.citation.volumeNumber 192
dc.citation.issueNumber 4
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1086/698726
dc.identifier.pmid 30205026
dc.type.publication publisher version
dc.citation.firstpage E139
dc.citation.lastpage E149


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