Table 1.
PERMANOVA (analysis of variance using distance matrices, ADONIS) comparisons based on Bray–Curtis dissimilarities of seawater bacterial and archaeal SSU rRNA amplicons grouped into MED nodes collected across reef‐systems.
| Factorsa | df b | Sums of squares | Mean squares | Pseudo F statistic | R 2 c | p‐value (perm.) |
|---|---|---|---|---|---|---|
| Region | 2 | 2.3619 | 1.18093 | 12.5082 | 0.18028 | 0.001 |
| Water‐type (region) | 2 | 2.3047 | 1.15236 | 12.2057 | 0.17592 | 0.001 |
| Reef [water‐type (region)] | 18 | 4.7583 | 0.26435 | 2.7999 | 0.36320 | 0.001 |
| Depth {Reef [water‐type (region)]} | 9 | 1.3157 | 0.14619 | 1.5485 | 0.10043 | 0.039 |
| Residuals | 25 | 2.3603 | 0.09441 | 0.18016 | ||
| Total | 56 | 13.1009 | 1.000 |
a
Nested comparisons are denoted by parentheses; e.g. Reef [Water‐type (Region)] indicates that the factor ‘Reef’ is nested within the factor ‘Water‐type’ that is nested within the factor ‘Region’.
b
df = degrees of freedom.
c
R 2 = percentage of variation explained by each factor.
perm. = 999 permutations.