Heat tolerance in relation to leaf construction costs
For T50 the best model included LMA and an interaction between elevation and LMA, with an adjusted R2 of 0.30 (F2,118=26.11, P <0.001). The significant interaction term arose from a strong positive effect of LMA on T50 in lowland species that was not observed among mid-elevation and pre-montane species (Fig. 6). LDMC did not have a significant effect on T50 (p >0.1). For TCrit, neither LMA nor LDMC were significant predictors. LDMC had a weak, but significant effect on b, when elevation was included in the model (F2,118=5.2,p <0.01, R2adj=0.07), with species with greater LDMC showing steeper declines in Fv/Fm around T50. LMA had a moderate, but statistically significant effect on b (F2,118=7.6, p =0.007, R2adj=0.05).