Bark Beetle Host-tree Selection

Figure 2. Idiosyncratic host-tree selection by different bark beetle species – each of them associated with a particular tree species – indicates tree stress was only weakly related to which trees died during drought.  Shades of green indicate magnitude of tree stress (estimated from growth rates), ranging from low (dark green) to high (light green); large and small tree symbols correspond to trees with trunk diameters ≥20 cm and <20 cm, respectively. Trees with and without red Xs indicate bark beetle death rate with respect to tree stress and size class; trees with a red X demonstrate high mortality rate (25-50%), whereas no red X indicates low mortality rate (0-15%). (from Figure 7 in Stephenson et al., 2019)