2.6 | Tree performance
To show local adaptation of trees with different phenotypes to inland
and coastal environments, we plotted the mean values of the first
phenotypic PC and the mean values of the stem basal area of all living
and dead trees in individual plantation rows and fitted smoothed lines
in each of the inland and coastal sites using the function lowess withf = 1 in R 3.3.2. We interpreted different slopes of fitted lines
between the sites as local adaptation. The stem basal area
(cm2) of living trees was calculated from the measured
girths of their stems. The stem basal area of dead trees was treated as
0 cm2. Thinned trees in the inland site were excluded
from the calculation. Statistical differences in the mean stem basal
area among taxa in each site were verified using the function
kruskal.test in R 3.3.2.