Spatial and temporal variation of the benthic macrofauna in a grossly polluted estuary from southwestern Spain

Table 2 Results of the one-way ANOVA for the temporal differences of sediment parameters

Parameter	MS	MS error	F	P	Homogeneous group
Organic matter (%)	0.24	0.11	2.19	NS	–
Silt and clay (%)	0.04	0.53	0.08	NS	–
TOC	0.06	0.06	1.11	NS	–
Cd	0.01	0.06	0.19	NS	–
Zn	0.06	0.23	0.28	NS	–
Cu	0.12	0.49	0.24	NS	–
Cr	0.15	0.16	0.94	NS	–
Hg	0.04	0.14	0.32	NS	–
Fats	0.26	0.06	4.26	<0.03	1998 2000 2002
Hydrocarbon	0.94	0.11	8.87	<0.001	1998 2002 2000
N	5.02	0.20	24.78	<0.0001	1998 2000 2002
Phosphate	5.22	0.06	84.08	<0.0001	1998 2000 2002

The homogeneous groups according to the SNK test (P < 0.05) are indicated with a continuous line. Degrees of freedom = 2
NS not significant

ISSN: 1438-3888