Caytee Lush

Université de Sherbrooke
M.Sc. candidate

Supervisor: Mark Vellend
Start: 2025-05-01

Project

An experimental test of the causes of elevation range limits in a mountain-top lichen
As species ranges are shifting to higher elevations due to climate change, the unique biological communities inhabiting mountain summits are threatened. My research will involve a transplant experiment with a high-elevation, niche-limited lichen to test whether humidity drives its upper elevational range limit. I will pair this mechanistic approach with species distribution models exploring the role of humidity in the distributions of three lichens with montane-coastal range patterns. Together, these approaches contribute to a deeper understanding of the processes shaping species range limits and can help inform predictions and conservation decisions for sensitive species.

Keywords

Pseudevernia cladonia, distribution limits, niche limitation, elevational gradients, lichen transplants, mountaintops