3.2. Traits correlations
Our tests revealed that PL was significantly related only to the number of pollinator functional groups (Table 2, Fig.2). We found no significant relationship between PL and other tested traits, including the multiple regression with all traits (F=0.83, p=0.57). The only trait selected by the AIC-based stepwise selection was again the plant specialization. All correlation indices between particular quantitative floral traits are presented (Table 1, Appendix A).
Both models, the unimodal and the linear, were significant (unimodal: F=7.95, p=0.003, Fig.2B; linear: F=4.39, p=0.049, Fig.2A). However, due to the relatively small number of target plant species, this unimodal relationship may be greatly affected by outlying values at the edges.