Keywords: Boreal forestfire.jpg en A prescribed fire in a black spruce-paper birch-quaking aspen community in boreal Alaska 2012-02-02 08 47 42 http //www fs fed us/database/feis/plants/tree/poptre/all html US Forest service FROSTFIRE other versions PD-USGov Wildfires Prescribed burn Picea mariana Populus tremuloides |