Broken by bison, aspen saplings having a tough time in northern Yellowstone

Luke Painter and OSU College of Forestry collaborators Robert Beschta and William Ripple examined a random sampling of plots in 87 randomly selected aspen stands, and 18% of saplings had been broken. They may resprout from their base, but the sapling height has been lost and new sprouts are vulnerable to being eaten by bison or other herbivores, the researchers note.