I study how shrub expansion in tundra ecosystems affects wildlife habitat. I am doing my research in Alaska, where in the last fifty years temperatures have increased at twice the rate as the rest of the United States. Coinciding with the warming temperatures has been an increase in shrubs in both Arctic and alpine tundra. Increasing shrubs may cause positive feedbacks to climate warming, alter ecosystem processes, and change available forage for wildlife. Understanding how shrub are expanding will help land managers make informed decisions about managing and protecting wildlife habitat.