Optimal values of the predictor variables for the six emission types estimated
with OUMV models (Ornstein-Uhlenbeck assuming different optimal values and
phenotypic variability for each emission type) for the 1000 stochastic character
maps (in the graphs there is a point for every emission type and model). The
results for MAT were calculated with OUM models (assuming different state means
but equal multiple rates of evolution) due to lower AICc (see Table S4). N, foliar
nitrogen concentration; P, foliar phosphorus concentration; LMA, leaf mass per
area; MAT, mean annual temperature; MAP, mean annual precipitation; NE,
non-emitters; ISP, isoprene emitters only; MTP, monoterpene emitters only; MTPs,
monoterpene emitters only that store monoterpenes; TWO, emitters of both
isoprene and monoterpenes; TWOs, emitters of both isoprene and monoterpenes that
also store monoterpenes; DW, dry weight. Medians are presented in Table 2.