Beckage et al. 10.1073/pnas.0708921105. |
Fig. 6. Basal area of dominant tree species of northern hardwood (top graphs) and boreal (bottom graphs) forests by size class for the lower and upper portions of the ecotone for 1964 and 2004. The size class distributions of stem diameter at breast height are 2-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, and 70-80 cm. The final paired column represents total basal area across size classes.
Fig. 7. Density (log transformer) of dominant tree species of northern hardwood (top graphs) and boreal (bottom graphs) forests by size class for the lower and upper portions of the ecotone for 1964 and 2004. The size class distributions of stem diameter at breast height are 2-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, and 70-80 cm.