Clarke, Blaine (Washington and Lee University). Mentor: David Marsh (Washington and Lee University). Crossing a clearcut: Orientation and homing behavior in the red-backed salamander, Plethodon cinereus.

Abstract: I studied the effects of clearcuts on salamander dispersal behavior. I tested the ability of salamanders (Plethodon cinereus) to orient toward forest by releasing them in clearcuts and tracking their direction of movement. I also used salamander homing ability to study whether small clearcuts form a barrier to dispersal. I displaced salamanders into either clearcut areas or intact forest, and then determined how many animals returned to their original home. For the orientation experiment, I had low recapture rates and did not obtain enough data for statistical analysis. In the homing experiment, I found no significant difference in frequency or rate of return among the two treatment groups, though salamanders displaced farther (55m) were less likely to return than salamanders displaced a smaller distance (25m). These results demonstrate that while salamanders may have difficulty dispersing long distances, small cleared areas do not appear to be major barrier to dispersal.