Response of Larval Lepidoptera and Their Avian Predators to Experimental Ice Storms in a Northeastern Forest.

摘要

Experimental ice storms of varying severity were applied to replicate plots of mature northern hardwoods to quantify effects of this extreme weather event on forests. I investigated effects of ice storm treatments on larval Lepidoptera and their avian predators, both key contributors to ecosystem function.;I conducted feeding assays to assess caterpillar growth and used point counts to measure insectivorous bird activity. Plasticine model caterpillars were deployed to estimate predation. Caterpillar growth rates positively correlated with treatment severity. Birds responded to ice storm treatments as a single diffuse disturbance. Caterpillar predation was not affected by treatments. I conclude that ice storms increased food quality for caterpillars and increased avian habitat use in the treated area.;I created a lesson plan based on the plasticine caterpillar experiment. This lesson is simple and accessible for students to investigate ecological principles and scientific inquiry, and has been successfully implemented at two schools.