USGS Open File Report 02-208
Ecological Evaluation of the Abundance and Effect of Elk Herbivory in Rocky Mountain National Park, Colorado, 1994-1999
Part I - Empirical Findings
Chapter Five: Changes Induced by Elk Herbivory in the Aboveground Biomass Production and Distribution of Willow (Salix monticola Bebb): Their Relationship with Plant Water, Carbon, and Nitrogen Dynamics
Part II - Modeling
Did You Know?
Temperature causes tree line. Trees need an average growing temperature of about 50 degrees fahrenheit.