Figure 4. Total antioxidants (A) and flavonoids (B) in leaves ofFagus grandifolia juveniles in central New Jersey, USA forests growing with four levels of Microstegium vimineum cover. Graphs show least-squares means + 95% CL, backtransformed from log10. N for each mean, from right to left: A) 61, 25, 22, 9; B) 60, 13, 19, 7. Means labeled with different letters in A were different at P = 0.03 and in B they were different only at P=0.06 (none vs. 16-65%) and P=0.07 (>0-1,5% vs. 16-65%) level, based on adjustment for six multiple comparisons with the Tukey-Kramer method.