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- W1995383951 abstract "Predators can have positive impacts on their prey through such mechanisms as nutrient mineralization and prey transport. These positive feedbacks have the potential to change predictions based on food web theory, such as the assertion that enrichment is destabilizing. We present a model of a simple food web, consisting of a resource, a consumer, and its predator. We assume that the predator has a direct positive effect on the consumer, by increasing the rate at which the consumer acquires resources. We consider two cases: the feedback strength is a saturating function of predator density, or it is proportional to the encounter rate between predators and prey. In both cases, the positive feedback is stabilizing, delaying or preventing the onset of oscillations due to enrichment. Positive feedback can introduce an Allee effect for the predator population, yielding multiple stable equilibria. Strong positive feedback can yield counterintuitive results such as a transient increase in consumer density following the introduction of predators, and a decrease in the resource pool following enrichment." @default.
- W1995383951 created "2016-06-24" @default.
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- W1995383951 date "2004-03-01" @default.
- W1995383951 modified "2023-09-27" @default.
- W1995383951 title "Modeling direct positive feedback between predators and prey" @default.
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- W1995383951 doi "https://doi.org/10.1016/j.tpb.2003.09.004" @default.
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