Silver Fir Defoliation Likelihood Is Related to Negative Growth Trends and High Warming Sensitivity at Their Southernmost Distribution Limit
Figure 5
Recent trends in basal area increment (BAI) and growth sensitivity to drought (P-ETP, difference between precipitation and evapotranspiration) for silver firs with contrasting defoliation degree; in the logistic regression declining trees correspond to the last category (trees with percentage of crown defoliation above 50%). In the box plots, error bars represent the 5th/95th percentiles; boxes represent the standard errors; solid lines represent the median; dashed lines are the mean values; and points are outliers.
