Figure 2 Number of sample plots of ash trees (all ash species combined) within each EAB infestation degree category by (a) latitudinal range, (b) altitudinal range, (c) age class, and (d) DBH class. The numbers of sample plots of ash trees in each EAB infestation degree category are given above the heat maps. (See Figure 1 legend for explanation of degrees of EAB infestation).