Fig. 2.
Leaf transpiration rates (control n = 3, roof n = 6 per stand and species) of the five functional groups (T fg) at different campaigns during two growing seasons. The boxes show medians and quartiles, the whiskers show 1.5 times the interquartile range of the data. The asterisks mark significant differences (P <0.05*; P <0.001**) tested with a linear model on the basis of the mean values. SP12 Spring 2012, LS12 late summer 2012, ES13 early summer 2013, LS13 late summer 2013. The results of the linear mixed effects model for the transpiration of the different functional groups as a function of exploratory, management intensity, treatment (precipitation reduction), group and the interaction of group and treatment are given in Table S3. Note that the y-axes for leaf transpiration rates differ among the functional groups