Kurt Ingeman
Integrative Biology
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Presentation Time: 
2015 - 4:30pm
The introduction of a predator into an existing food web creates a number of novel competitive and trophic interactions, often with non-intuitive effects on species persistence and community stability. For example, introduced and native predators may benefit from an indirect mutualism if anti-predator behavior elicited by one species results in increased predation success in the other. This interaction can also be influenced by prey's ability to accurately evaluate predation risk, potentially yielding competitive advantage to an unrecognized predator (prey naivete). By incorporating likely features of a predator introduction into an intraguild predation (IGP) model, it is possible to generate hypotheses regarding the effects of invasion on the stability of host communities. My objectives therefore, are (1) to examine the effects of adaptive prey foraging on community structure and stability in an IGP module (2) model generalized prey defense versus antagonistic predation-risk trade-offs, and (3) incorporate prey naivete in relation to individual predator species in the model community. Each model variation will incorporate adaptive prey foraging behavior in the basal prey resource, whereby prey optimize fitness with regards to the trade-off between predation risk and foraging gain in response to the density of one or both predators. By modifying the anti-predator behavioral response, I will model prey naivete that is a likely feature of (at least some) predator introductions. Thus, I will generate predictions about whether adaptive prey behavior can stabilize an inherently unstable IGP community, and whether this stability relies on either predator-specific risk trade-offs, perfect knowledge of predation risk, or both.