Figure 3: Population means (+/- 1SE) for (a) leaf traits and (b) growth
traits measured in each garden as well as the population mean trait
plasticity values, regressed onto their home climate (indicated by
principal component axis 1 values). Populations are colored by mean
annual temperature (MAT °C). Regression lines are present when there is
a significant relationship (p < 0.05) between the PC1 axis and
the trait. SLA is in unit of mm2/mg. Note the scale on
the y-axis for the plasticity regressions are different than the trait
regressions.