Comparing variance components calculated in the field and then in the
common garden, we estimate that 93% of the among site variation in
frond area in the field was environmental, with only 7% genetic, which
persisted in the common garden (Fig. 3A&B, Table 3). Likewise, 96% of
the among site variation in root length in the field was environmental,
with only 4% due to genetic variation, which persisted in the common
garden (Fig. 3C&D). Whereas the vast majority of among site phenotypic
variation was environmental in origin, within site phenotypic variation
had a more substantial genetic component (Frond area: 26%, Root length:
21%), (Table 3).
Table 3. Environmental and genetic components of phenotypic
variation. Variation in the field survey (FS) consists of the combined
contributions of environmental and genetic variance, whereas variation
in the common garden (CG) isolates the genetic component.