Table 4. Multivariate analyses of variance of the relative abundances (Bray-Curtis index) and composition (Jaccard index) of assemblages in each treatment.

Site (Si) was random with 2 levels. Habitat type (Ha) and Contaminant (Contam) were fixed and orthogonal, with 2 and 5 levels, respectively; n = 3. Data were pooled when p > 0.25.

Source	df	Structure (Bray–Curtis index)		Composition (Jaccard index)
		MS	Pseudo-F	MS	Pseudo-F
Site (Si)	1	21,240	9.37**	20,977	9.60**
Habitat type (Ha)	1	22,186	9.79**	8,081	3.70**
Contaminant (Contam)	4
C1—Control vs Carbaryl	1	2,188	0.99ns	2,026	0.89ns
C2—Control vs Iron	1	2,575	1.17ns	1,722	0.76ns
C3—Control vs Metal	1	1,990	0.87ns	1,586	0.71ns
C4—Control vs Blank	1	2,435	1.16ns	1,822	0.78ns
Ha × Contam	4
Ha × C1	1	3,807	1.72ns	4,125	1.82*
Ha × C2	1	3,198	1.45ns	2,890	1.27ns
Ha × C3	1	3,322	1.45ns	3,094	1.39ns
Ha × C4	1	3,425	1.62ns	2,199	0.94ns
Pooled	49	2,265		2,184
Total	59

Notes.

ns, not significant (p > 0.05).

^*p < 0.05.

^**p < 0.01.