2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | Multiple predator effects among larval stages of pond-breeding salamanders | Virtual Platform
Multiple predator effects among larval stages of pond-breeding salamanders
When multiple predators co-occur in a community, they can have either additive or non-additive impacts on prey survival. Non-additive impacts, or emergent multiple predator effects (MPEs), occur when foraging rates of combined predators cannot be predicted based on their individual foraging rates, resulting in either prey risk enhancement or reduction. We conducted several experiments to assess whether emergent MPEs occur between different species of larval salamanders, as well as how different factors (prey density and the occurrence of an additional top predator) may mediate emergent MPEs. Additionally, we experimentally tested how emergent MPEs affect the diversity of anuran prey assemblages. Across all three experiments, we found that larval salamanders had additive impacts on prey, rather than exhibit emergent MPEs. This occurred despite the different contexts under which we investigated MPEs. Furthermore, we found larval salamanders had additive impacts on prey diversity. Altogether these results suggest that emergent MPEs may not play a critical role in structuring predator-prey dynamics in this system, despite substantial a priori knowledge on larval aggression that would have suggested strong interference among predators.
- Species interactions
- Vertebrates
- Biodiversity
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Presenters/Authors
Tom Anderson
(), Southern Illinois University Edwardsville, thander@siue.edu;
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Jon Davenport
(), Appalachian State University, davenportjm@appstate.edu;
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