Methods:
Each exclosure plot measures 80 meters north-south and 50 meters east-west (0.4 hectare; 0.990567 acre). These exclosure plots are subdivided into 20 plots measuring 20 meters north-south and 10 meters east-west. Each plot is further subdivided into 5 meter by 5 meter subplots.
All ground level woody and herbaceous vegetation was identified to species or genus. Cover percentage of each vascular plant species was determined by means of a sampling frame (equal to 0.1% of the subplot) and recorded using a 12-category scale.