Related Experiment Video
Updated: Dec 7, 2025
06:25
A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
Published on: May 16, 2025
993
The context dependence of non-consumptive predator effects
Aaron J Wirsing1, Michael R Heithaus2, Joel S Brown3,4
1School of Environmental and Forest Sciences, University of Washington, Box 352100, Seattle, WA, 98195, USA.
Ecology Letters
|September 29, 2020
Summary
Predators impact ecosystems through non-consumptive effects (NCEs) by altering prey behavior. Understanding these predator-prey interactions requires mapping evasion landscapes to predict NCEs and their ecosystem consequences.
Area of Science:
- Ecology
- Behavioral Ecology
Background:
- Non-consumptive predator effects (NCEs) significantly influence ecosystem structure and function.
- Predicting the spread of predator-induced trait changes within communities remains difficult.
Purpose of the Study:
- To conceptualize the multi-stage process of direct and indirect NCEs.
- To identify key drivers of NCE contingencies.
- To provide a framework for predicting NCEs.
Main Methods:
- Review and synthesis of existing research on NCEs.
- Categorization of contingency drivers (prey, predator, setting).
- Development of a predictive framework for direct NCEs.
Main Results:
- Identified numerous factors creating NCE contingencies.
- Highlighted the importance of habitat domains and 'evasion landscapes' for predicting NCEs.
- Emphasized the need to map prey evasion success patterns.
Conclusions:
- Numerous factors influence NCE contingencies, requiring better anticipation in research.
- Mapping evasion landscapes is crucial for predicting direct NCE manifestation.
- Further research is needed on context-dependent indirect NCEs and interactive effects.
Keywords:
Anti-predator behaviourcontingencyescapeevasion landscapehabitat domainhunting modepredation riskpredator-prey interactionsrisk effectstop-down effectstrade-offsMore Related Videos
Related Concept Videos
02:39Predator-Prey Interactions
20.6K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
20.6K
00:57Population Growth
27.5K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
27.5K
00:48Optimal Foraging
13.0K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
13.0K
02:07Conservation of Declining Populations
12.3K
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
12.3K
01:21Frequency-dependent Selection
22.8K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
22.8K
02:04Conservation of Small Populations
16.4K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
16.4K