Artificial nighttime lighting impacts visual ecology links between flowers, pollinators and predators

Area of Science:

• Ecology
• Environmental Science
• Animal Behavior

Background:

• Artificial lighting is rapidly changing global nighttime environments.
• This alteration impacts the visual ecology and interactions of numerous organisms.

Purpose of the Study:

• To investigate the effects of various artificial light sources on hawkmoth visual ecology.
• To assess impacts on floral signal perception, sexual signaling, and predator defense.

Main Methods:

• Examined hawkmoth responses to different artificial light spectra and intensities.
• Evaluated effects on chromatic signal use, natural light mimicry, and intensity-dependent impacts.

Main Results:

• Artificial light sources differentially affect hawkmoth visual behaviors.
• Phosphor Converted (PC) amber LEDs show unpredictable impacts based on distance and object color.
• Some light sources prevent chromatic signal use, while others mimic natural light.

Conclusions:

• Artificial lighting poses diverse threats to hawkmoth visual ecology.
• A nuanced approach to outdoor lighting is crucial for environmentally sensitive areas.
• Lighting strategies should consider intensity and spectra to mitigate negative impacts.