Table 3.

Trait (above the diagonal) and genetic (below the diagonal) differentiation among the three tidal heights

	HI	LI	S
HI	—	0.36	1.32
LI	0.012	—	0.97
S	0.002	−0.002	—

Trait distance among the three tidal heights measured as the two‐dimensional Euclidean distance between the mean PC1 and PC2 scores of each pair of tidal heights (PCA trait distance) and genetic differentiation (F_ST) among tidal heights in Bodega Harbor, CA. Bold F _ST values are significant at α = 0.05, although the magnitude of the differentiation is low. HI: high intertidal; LI: low intertidal, S: subtidal.