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- W2884280615 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." @default.
- W2884280615 created "2018-08-03" @default.
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- W2884280615 date "2018-10-01" @default.
- W2884280615 modified "2023-10-02" @default.
- W2884280615 title "Prey Limitation Drives Variation in Allometric Scaling of Predator-Prey Interactions" @default.
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- W2884280615 doi "https://doi.org/10.1086/698726" @default.
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