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• W150646136 abstract "We explore the role of rapid evolution in the community dynamics of a three-species planktonic food web with intraguild predation. Previous studies of a two-species predator–prey system showed that rapid evolution of an anti-predator defence trait in the prey results in long-period antiphase predator–prey cycles (predator maxima coinciding with prey minima and vice versa) that are virtually diagnostic of eco-evolutionary dynamics. Here, we ask if there exist diagnostic population dynamics for a food web where algae are consumed by two predators (flagellates and rotifers), while rotifers also consume flagellates. With genetically homogeneous non-evolving prey, we previously predicted theoretically, and confirmed experimentally, that population cycles exhibit short-period oscillations with peaks in prey density followed by peaks in flagellates and then rotifers. In contrast, when prey defence can evolve, theory predicts a wide diversity of possible dynamics depending upon the trade-off between defences against the two predators. When defence against one predator implies vulnerability to the other, the predicted pattern is that predators “take turns”: one predator peaks at each prey minimum, while the other remains rare because prey are defended against it. There is strong selection for prey to evolve defence against the abundant predator (losing defence against the rare one); once this happens, predator dominance reverses rapidly. This pattern is what we generally observed in seven separate microcosms (sampled daily for 130–330 days). Cycles in which predator abundances alternate between stasis and rapid change may be explained using the concept of canards from dynamical systems theory. Nevertheless, details differed among experimental runs, making patterns diagnostic of eco-evolutionary dynamics difficult to identify." @default.
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• W150646136 date "2014-01-01" @default.
• W150646136 modified "2023-09-30" @default.
• W150646136 title "Eco-Evolutionary Dynamics in a Three-Species Food Web with Intraguild Predation" @default.
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• W150646136 doi "https://doi.org/10.1016/b978-0-12-801374-8.00002-5" @default.
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