Table 2. Results from Permanova analysis for differences in Δδ¹³C (‰) and total uptake I_total (µg C m⁻²) amongst the experimental treatments (TR), replicates (Rep) nested in TR, depth layers (D) and nematode groups (Sp) and their interactions TRxD, TRxSp, DxSp, Rep(TR)xD, Rep(TR)xSp, Rep(TR)xDxSp, TRxDxSp and Error term, based on a Euclidean distance based resemblance matrix (df = 3,3,2,8,9,6,6,15,15,15,17,48 resp.).

Factor		Δδ13C	Itotal
TR	MS	17787	57.14
	pseudo-F	4.33 a	0.34
D	MS	55818	697.08
	pseudo-F	12.89 c	2.49
Sp	MS	64375	323.94
	pseudo-F	11.91 b	1.53
Rep (TR)	MS	1135.8	111.82
	pseudo-F	9.85E-02	0.37
TRxD	MS	4703.6	81.25
	pseudo-F	1.25	0.29
DxSp	MS	66871	1031.6
	pseudo-F	19.28 c	4.03 a
Rep(TR)xD*	MS	1870.5	271.5
	pseudo-F	0.16	0.89
Rep(TR)xSp*	MS	2135	160.97
	pseudo-F	1.19	0.53
TRxSp	MS	10258	43.60
	pseudo-F	1.95	0.21
Rep(TR)xDxSp*	MS	1917.3	246.28
	pseudo-F	0.16	0.81
TRxDxSp*	MS	7332.1	130.86
	pseudo-F	2.15	0.51
Res	MS	11535	305.88

^a : 0.01< p<0.05;

^b : 0.001<p<0.01;

^c : p<0.001

“*”: term has one or more cells with a single replicate.