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Habitat structure changes the relationships between predator behavior, prey behavior, and prey survival rates
James L L Lichtenstein1, Karis A Daniel2, Joanna B Wong3
1Department of Ecology, Evolution, and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA. jlllichtenstein@gmail.com.
Oecologia
|February 2, 2019
Summary
Habitat complexity influences predator-prey interactions. Increased structural complexity improved predator survival, while predator behavioral diversity unexpectedly enhanced prey survival in this study.
Area of Science:
- Ecology
- Behavioral Ecology
- Ecosystem Dynamics
Background:
- Predator and prey behavior significantly impacts interaction outcomes.
- Habitat structure is a key environmental factor influencing ecological interactions.
Purpose of the Study:
- To investigate how habitat complexity affects predator-prey behavioral interactions and survival rates.
- To determine if individual behavioral traits or group-level behavioral diversity best predict survival in varying environments.
Main Methods:
- Staged mesocosms with contrasting structural complexity (varying climbing structures).
- Inclusion of cannibalistic predators (mantises) and their prey (katydids).
- Measurement of individual behavioral traits (activity, boldness, perch height) and calculation of multivariate behavioral volumes.
Main Results:
- Predator (mantis) survival was higher in complex habitats, independent of behavior.
- Prey (katydid) survival increased with greater predator group behavioral diversity (larger behavioral volumes).
- Increased perch height in both predator and prey heightened mortality, an effect amplified by complex structures.
Conclusions:
- Habitat complexity modulates the influence of predator and prey behavior on survival.
- Behavioral diversity within predator groups can decrease prey mortality.
- Environmental context is crucial for understanding the ecological consequences of behavior.
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