Table 2.

Correlations (Spearman's rank correlation coefficients) between abundances of archaeal amoA (AOA-amoA), archaeal and bacterial 16S rRNA genes, soil chemical parameters (soil pH, ammonium and nitrate concentrations, total C and N content) and respiration-based parameters (BAS, basal respiration; C_mic, microbial biomass) along the granitic and basaltic catena.

	${\text{NO}}_3^{-}$	${\text{NH}}_4^{+}$	%C	%N	BAS	Cmic	AOA-amoA	bact. 16S rRNA	arch. 16S rRNA
pH	0.93**	0.18	0.93**	0.93**	0.71	0.86*	0.71	0.50	0.71
${\text{NO}}_3^{-}$		0.21	1***	1***	0.79*	0.96***	0.79*	0.68	0.79*
${\text{NH}}_4^{+}$			0.21	0.21	0.43	0.29	0.14	0.07	0.14
%C				1***	0.79*	0.96***	0.79*	0.68	0.79*
%N					0.79*	0.96***	0.79*	0.68	0.79*
BAS						0.89*	0.71	0.71	0.71
Cmic							0.75	0.71	0.75
AOA-amoA								0.93**	1***
bact. 16S rRNA									0.93**

Two-tailed levels of significance are indicated as follows:

^*0.05,

^**0.01,

^***0.001.