Title: Selection of winter food by beavers at Elk Island National Park
Description: Masters thesis. Results of study of 5,814 trees on 239 vegetation plots at Elk Island National Park to test three hypotheses about beaver (Castor canadensis) food selection: 1)beavers select certain classes of woody vegetation, 2)selection increases with increasing distance from water, and 3)preferred classes of vegetation are those with highest nutrient levels.