Figure 4

Partitioning tree of yeast diversity. Recursive binary partitioning tree calculated for yeast diversity predicted by nectar traits (volume + sugar concentration + nectar type), pollinator compositions (visitation frequencies of each functional group), and year. Stopping criteria were set to α = 0.01 and minimum sizes of terminal nodes restricted to 30 L. Nodes are numbered and respective critical splitting variable values are provided on the lines. Bar-plots show weights of species in the respective node assemblages. Light bars illustrate basidiomycetes and dark bars ascomycetes. Number of isolates (n), Functional dispersion (FDis), Shannon index (H), and mean pairwise distances compared to patterns expected under the selected null model (Z_phy) are provided for each species assemblage. Asteriks refer to significanes (* p < 0.05, *** p < 0.001) as calculated to the null model with default iterations and randomizations.