TABLE 2.

Distance-based multivariate linear model of bacterial community variability against the physicochemical properties of the sediment samples after 999 permutations^a

Variable	Pseudo-F	P	% variation explained	Cumulative % variation explained
Marginal tests
TN	6.018	0.001	31.64
AP	5.999	0.001	31.58
Silt	5.458	0.002	29.57
Sand	5.420	0.002	29.42
Clay	5.139	0.005	28.33
pH	5.107	0.004	28.20
Fed	4.813	0.005	27.02
Ammonia	4.468	0.005	25.58
OC	3.792	0.010	22.58
EC	3.746	0.007	22.37
AK	2.774	0.017	17.58
Sequential tests
TN	6.018	0.001	31.64	31.64
EC	6.671	0.001	24.42	56.07
Silt	2.022	0.012	6.82	62.89
OC	1.170	0.275	3.89	66.78
pH	1.167	0.266	3.81	70.59
Fed	1.055	0.441	3.43	74.02
AK	0.999	0.495	3.25	77.26
Clay	0.941	0.515	3.08	80.34
Sand	1.046	0.421	3.40	83.74
AP	0.191	0.952	0.91	84.65
Ammonia	0.140	0.937	0.82	85.47

^aFor marginal tests, each variable was analyzed individually (ignoring other variables). For sequential tests (forward selection of variables), the percentage of variation explained by each variable added to the model was conditional on the variables already in the model. Data in boldface type are significantly correlated (P < 0.05). The abbreviations of physicochemical properties are the same as those in Table 1.