Table 2. Hierarchical analysis of molecular variance (AMOVA) for Zostera marina in each region: (a) Bodega Bay and Tomales Bays (b) San Francisco Bay and (c) the Virginia Coastal bays.
| Source of variation | d.f. | Variance components | Percentage of variation | P |
|---|---|---|---|---|
| (a) Bodega Bay–Tomales Bay | ||||
| Among sampling dates | 1 | 0.002 | 0.1 | 0.4 |
| Regions within sampling dates | 5 | 0.09 | 5.84 | <0.0001 |
| Sites within regions | 11 | 0.09 | 0.4 | <0.0001 |
| Tidal heights within Sites | 12 | 0.05 | 3.1 | <0.0001 |
| within tidal heights | 808 | 1.4 | 90.6 | |
| (b) San Francisco Bay | ||||
| Among sampling dates | 1 | −0.3 | −5.8 | 1 |
| Sites within sampling dates | 2 | 0.06 | 9.9 | <0.0001 |
| Within Sites | 160 | 0.6 | 95.9 | |
| (c) Virginia Coastal Bays | ||||
| Among sampling dates | 1 | 0.01 | 0.7 | 0.2 |
| Sites within sampling dates | 92 | 1.5 | 99.3 | |