Figure 6

Differences in total amount of respired CO ₂ in the 14-day climate chamber incubation. With regard to (a) origin of leaf litter, (b) species, and (c) both (n = 4, except for Robinia periurban where n = 3). Asterisks indicate significant differences due to origin of litter, and different letters indicate different species’ means according to post hoc tests.