Figure 3: Pairwise correlation coefficients for all climate, structure, productivity, and topography metrics. Pie areas are representative of R2 value as a percentage of the circle. Blue indicates positive correlation and red indicates negative correlations. Asterisks indicate significant correlations (p < 0.05). The absolute values of all Spearman rank correlation coefficients were below 0.6, suggesting that these metrics correspond to unique elements across different forest ecosystems.