Aspen: What is Sudden Aspen Death?

You've probably noticed large swathes of dead or dying aspen trees. Something is happening to the aspens that turn our mountains gold every autumn. Some aspen stands are not recovering from disturbance and not regenerating. The mystery of the aspen decline deepens. Forest scientists are working to discern what is happening to the aspen groves. Learn about some of the factors that accounts for Sudden Aspen Death (SAD) in this edition of Voices of the Valley Floor-a and Fauna. 

Photo: Quaking Aspen grove (Populous tremuloides) displaying SAD.