TABLE 2.

Results of the PERMANOVA test on the physical-chemical and trophic variables of the study area^a

Variable type and source	df	SS	MS	Pseudo-F	Significance (P)	% of explained variance
Physical-chemical variables
Site	6	206.2	34.360	16.329	<0.001	84.2
Depth	1	25.7	25.657	4.131	<0.01	8.8
Site × depth	6	37.3	6.211	2.952	<0.001	6.3
Residuals	28	58.9	2.104			0.7
Total	41	328.0
Trophic variables
Site	6	69.6	11.604	4.245	<0.001	51.9
Depth	1	2.6	2.632	0.963	NS	3.8
Site × depth	6	56.2	9.368	3.427	<0.01	42.3
Residual	28	76.5	2.733			2.0
Total	41	205.0

^aThe results of the PERMANOVA test on the physical-chemical (temperature, salinity, pH, oxygen, turbidity, and sediment grain size) and trophic (chlorophyll a, phaeopigment, protein, carbohydrate, and lipid sediment contents) variables of the study area are presented. df, degrees of freedom; SS, sum of squares; MS, mean square; Pseudo-F, statistic F; NS, not significant.