Thermal stress
Long term maximum temperatures were recorded as the average of annual
maximum daily temperatures in each transplant site, averaged between
years from 1981-2019. Maximum thermal anomalies were calculated as the
difference between daily temperatures in a recipient site over the
course of the experiment and the long-term maximum temperature in the
source site for each corresponding population. ‘Heat stress’ and
‘recovery’ growth periods of the experiment were defined as T0 -T2
(July-October) and T2-T4 (November-June), respectively, corresponding to
periods of positive and negative maximum thermal anomalies. Thermal
anomalies experienced by the different transplant treatments were
plotted using the ‘geom_flame’, function in the ‘HeatwavesR’ package
(Schlegel & Smit 2018) of R (version 3.6.1, 2019) .