Figure 2.

(A) Mean chlorophyll content per unit leaf area during winter for green (n = 5) compared to red (n = 5) leaves ± SE at each site for RR, WE, I40, and combined sites (see labels at top of figure); (B) Mean summer chlorophyll content for winter-red (n = 6) and winter-green (n = 6) portions of I40 site compared with winter chlorophyll content (n = 5 for both sides) ± SE. Significant differences between red versus green leaves (A); and summer versus winter leaves (B) denoted by asterisks (* p < 0.05; ** p < 0.01, *** p < 0.001, and **** p < 0.0001).