Table 4.

Results of linear mixed models for soil organism community variables at two depths (0–10 cm, 11–20 cm)

Random effects	Wald P	Fixed effects	df	F	P
0–10 cm depth
PLFA principal component 1
Plot	0.89	diversity	2,2	1.28	0.48
Site	0.32	height	2,2	6.94	0.01
		diversity × height	4,4	4.08	0.01
PLFA principal component 2
Plot	<0.0001	diversity	2,2	21.33	<0.0001
Site	0.35	height	2,2	5.63	0.01
		diversity × height	4,4	17.55	<0.0001
Bacterial DNA alpha diversity
Plot	0.31	diversity	2,2	0.65	0.53
Site	0.21	height	2,2	1.03	0.36
		diversity × height	4,4	0.84	0.50
Fungal DNA alpha diversity
Plot	0.35	diversity	2,2	2.60	0.082
Site	0.58	height	2,2	3.34	0.04
		diversity × height	4,4	0.7	0.59
Bacterial DNA Bray‐Curtis
Plot	0.965	diversity	2,2	0.55	0.582
Site	0.381	height	2,2	4.77	0.012
		diversity × height	4,4	1.32	0.277
Fungal DNA Bray‐Curtis
Plot	0.04	diversity	2,2	3.41	0.04
Site	0.32	height	2,2	0.86	0.43
		diversity × height	4,4	3.18	0.02
11–20 cm depth
PLFA principal component 1
Plot	0.32	diversity	2,2	1.28	0.28
Site	0.27	height	2,2	6.94	0.001
		diversity × height	4,4	4.08	0.004
PLFA principal component 2
Plot	0.37	diversity	2,2	5.76	0.004
Site	0.32	height	2,2	1.58	0.21
		diversity × height	4,4	2.93	0.02
Bacterial DNA alpha diversity
Plot	0.32	diversity	2,2	0.78	0.46
Site	0.39	height	2,2	3.65	0.03
		diversity × height	4,4	0.95	0.44
Fungal DNA alpha diversity
Plot	0.39	diversity	2,2	4.29	0.02
Site	0.45	height	2,2 = 0.13	0.13	0.87
		diversity × height	4,4	0.84	0.50
Bacterial DNA Bray‐Curtis
Plot	0.58	diversity	2,2	4.14	0.77
Site	0.33	height	2,2	0.29	0.02
		diversity × height	4,4	1.67	0.17
Fungal DNA Bray‐Curtis
Plot	0.04	diversity	2,2	0.21	0.81
Site	0.34	height	2,2	4.91	0.01
		diversity × height	4,4	2.01	0.10

Significant effects (P < 0.05) are indicated in boldface type. Where there was a significant difference between treatments, the direction of the effect is indicated. Refer to Fig. 2 for the differences between treatment means.