Table 2 Output of PERMANOVA main tests for (A) abundance fourth-root transformed with the Bray-Curtis index, (B) biomass fourth-root transformed with the Bray-Curtis index. Factors of analysis were channel area (AREA), environment (ENV), farming center (CENTER) and sampling site (SITE). P(perm) < 0.05 values are in bold
Source | d.f. | SS | MS | Pseudo-F | P (perm) | Unique perms |
|---|---|---|---|---|---|---|
A) | ||||||
 AREA | 2 | 22.628 | 11.314 | 3.8018 | 0.0001 | 9893 |
 Res | 128 | 380.920 | 2.976 |  |  |  |
 Total | 130 | 403.550 |  |  |  |  |
 ENV | 2 | 26.665 | 13.332 | 4.5281 | 0.0001 | 9848 |
 Res | 128 | 376.890 | 2.944.4 |  |  |  |
 Total | 130 | 403.550 |  |  |  |  |
 CENTER | 6 | 80.450 | 13.408 | 5.1458 | 0.0001 | 9806 |
 Res | 124 | 323.100 | 2.605.7 |  |  |  |
 Total | 130 | 403.550 |  |  |  |  |
 SITE | 46 | 274.810 | 5.974.2 | 3.8981 | 0.0001 | 9564 |
 Res | 84 | 128.740 | 1.532.6 |  |  |  |
 Total | 130 | 403.550 |  |  |  |  |
B) | ||||||
 AREA | 2 | 24.985 | 12.492 | 3.7757 | 0.0001 | 9866 |
 Res | 128 | 423.500 | 3.308.6 |  |  |  |
 Total | 130 | 448.490 |  |  |  |  |
 ENV | 2 | 27.043 | 13.522 | 4.1067 | 0.0001 | 9862 |
 Res | 128 | 421.450 | 3.292.5 |  |  |  |
 Total | 130 | 448.490 |  |  |  |  |
 CENTER | 6 | 82.509 | 13.752 | 4.6592 | 0.0001 | 9747 |
 Res | 124 | 365.980 | 2.951.4 |  |  |  |
 Total | 130 | 448.490 |  |  |  |  |
 SITE | 46 | 299.090 | 6.502 | 3.6559 | 0.0001 | 9558 |
 Res | 84 | 149.390 | 1.778.5 |  |  |  |
 Total | 130 | 448.490 |  |  |  |  |