Correlation between modelled and observed leaf and canopy
temperatures
Observed variation in ∆Tleaf was strongly predicted by
the trait-based energy balance model (∆Tmod), with an
RMSE of 3.524 and MAE of 3.116 (Supporting information S7a). However,
∆Tmod tended to underestimate ∆Tleaf forC. australe , and overestimate Tleaf for H.
novo-guineensis . This was likely due to errors associated with the
differences in Tair at the canopy height of each plant,
versus from the clearing where Tair was measured at 2.5
m height. This is reflected in Supporting information S7, where in
Supporting information S7b we see how the difference between observed
and modelled ∆T are correlated with plant height, and that this trend is
driven by a decrease in measured ∆Tleaf with plant
height in panel (Supporting information S7c) and no trend of
∆Tmod with plant height in panel (Supporting information
S7d). The correlation between ∆Tleaf and
∆Tmod was improved when modifying air temperature and
wind speed vertically through the canopy, however as this did not alter
results of provenance-differentiation it is not included (analysis not
shown).