THE EFFECTS OF NOISE AND LIGHT POLLUTION ON BIRD AND BAT DIVERSITY.
Jennifer Phillips; 1 Grand Ave, San Luis Obispo, CA, 93657; (559) 960-0520; jnphilli26@gmail.com; Helen Payne, Waverly Davis, Clinton Francis
Over evolutionary timescales the sensory environment has provided reliable channels for acoustic and visual communication and biological rhythms. Recently, the rise in multimodal anthropogenic pollution--noise and nightlight--present conditions that could fundamentally disrupt the ways in which organisms interact and respond to environmental cues. Because these stimuli typically co-occur in today's human-dominated world, understanding their combined influence is an urgent conservation priority. Here, we test the effects of noise and nightlight on bird and bat diversity in a pinon-juniper forest in northwest New Mexico. We measured species richness in both bird and bat communities, using presence/absence surveys and nesting attempts to determine bird diversity, and passive acoustic detectors to determine bat species diversity. We expect Noise to decrease bird and bat diversity and decrease avian nesting attempts, whereas Light increases avian nesting attempts but increases depredation. For bats, we expect to see increases in bat diversity at lights due to increased insect activity. Thus, we expect Light+Noise will have mixed effects on bird and bat diversity.
Ecology and Conservation of Birds II