Anthropogenic noise impairs foraging for cryptic prey via cross-sensory interference

Area of Science:

• Ecology
• Animal Behavior
• Sensory Ecology

Background:

• Globally rising anthropogenic noise levels pose significant threats to ecosystems.
• Noise pollution can disrupt ecological interactions by masking sounds and interfering with sensory information processing.
• Previous studies have largely overlooked noise impacts on visual information use in predator-prey dynamics.

Purpose of the Study:

• To investigate the impact of anthropogenic noise on the foraging performance of great tits (Parus major) when hunting cryptic prey.
• To determine if noise affects visual information processing during predator-prey interactions.
• To assess the influence of prey crypsis level on noise-induced performance deficits.

Main Methods:

• Great tits were trained to forage for paper moths with varying camouflage levels.
• Foraging performance was assessed in both the presence and absence of acoustic noise.
• Key metrics included approach and attack latencies for prey detection.

Main Results:

• Anthropogenic noise significantly increased prey approach and attack latencies.
• The effect of noise was dependent on the prey's level of camouflage.
• Noise exacerbated performance deficits specifically for cryptic prey, not conspicuous targets.

Conclusions:

• Anthropogenic noise interferes with visual information processing, particularly in challenging detection tasks.
• Noise pollution can alter predator-prey dynamics by impacting visual search efficiency, especially for camouflaged prey.
• These findings highlight the broad ecological consequences of noise pollution across sensory domains and its role in predator-prey evolutionary arms races.