Table 2.

Results of permutational multivariate analysis on the mean Bray–Curtis dissimilarities per depths between total community, prokaryotic, bacterial predators (bacpred), microeukaryotic, and protozoan rRNA contigs.

	Total			Prokaryotes			Bacpred			Microeukaryotes			Protozoa
Env. parameter	F.Model	R 2		F.Model	R 2		F.Model	R 2		F.Model	R 2		F.Model	R 2
Depth	6.81	0.460	***	6.84	0.461	***	6.44	0.446	***	5.98	0.428	***	6.88	0.462	***
Age	5.11	0.288	*	2.89	0.265	*	2.71	0.253		2.91	0.266	*	3.68	0.315	*
Layer	6.42	0.445	***	5.73	0.417	***	5.92	0.425	**	4.12	0.340	**	4.98	0.384	***
AL-PF			*			*			NS			**			*
SOM	4.77	0.373	***	4.76	0.373	***	4.89	0.379	***	3.68	0.315	**	4.16	0.342	**
H2O	5.23	0.395	**	5.22	0.395	**	5.42	0.404	**	4.32	0.351	**	5.07	0.388	***
pH	2.54	0.241	NS	2.53	0.240	NS	2.62	0.246	NS	2.42	0.233	*	2.81	0.260	*
Bacpreda	3.16	0.283	*	3.20	0.286	*	-	-	-	2.83	0.261	*	2.83	0.261	*
Protozoab	5.49	0.407	**	3.42	0.404	**	5.38	0.402	***	4.64	0.367	**	-	-	-

These were tested against the depth, age, layer, SOM, and moisture (H₂O), and pH. P-values < .05 were considered significant with *P < .05, **P < .01, and ***P < .005. Nonsignificant (NS) categories and pair-wise contrasts in age or layer were removed. Extended data on predatory and potential prey abundances can be found in Supplementary Table 2. ^aThe effect of bacpred abundance was tested on nonpredatory prokaryotes; ^bThe effect of protozoan abundance was tested on nonpredatory eukaryotes in order to prevent artifacts.