Spatial heterogeneity facilitates carnivore coexistence.

Area of Science:

• Ecology
• Wildlife Conservation
• Behavioral Ecology

Background:

• Dominant carnivores regulate populations and behavior of subordinate competitors.
• Carnivore coexistence is often facilitated by spatial/temporal avoidance and dietary niche separation.
• Landscape heterogeneity may offer refuges for subordinate species.

Purpose of the Study:

• Investigate how landscape heterogeneity facilitates coexistence between lions (Panthera leo) and African wild dogs (Lycaon pictus).
• Determine if wild dogs primarily use spatial avoidance or habitat selection to avoid lions.
• Assess if wild dog responses to lion risk are proactive or reactive.

Main Methods:

• Integrated step selection analysis combining telemetry data from lions and wild dogs.
• Utilized high-resolution remote sensing data for fine-scaled landscape analysis.
• Studied predator interactions in Hluhluwe-iMfolozi Park, South Africa, at high predator densities.

Main Results:

• Wild dogs' primary lion-avoidance strategy is selecting landscape features for predator detection avoidance.
• This habitat selection behavior was consistently employed by wild dogs.
• Wild dogs utilized these features more frequently during high-risk periods for lion encounters, indicating a proactive response.

Conclusions:

• Landscape heterogeneity provides an alternative mechanism for carnivore coexistence.
• Subordinate species may proactively use landscape features to avoid detection by dominant predators.
• This strategy is crucial as shrinking ranges increase interspecific competition.