Table 4.

SIMPER analysis of October 2011 16S amplicon data at Phylum level (sub-phylum for the Proteobacteria) ranking the groups contributing more than 1 % of the differences observed, showing the relative abundance (mean % amplicons in each treatment) for each group

Phylum or Subphylum	SIMPER % contributed/ culmulative		Bare fallow (bf) converted to			Arable (ar) converted to			Grass (gr) converted to
			bf	ar	gr	ar	bf	gr	gr	bf	ar
Verrucomicrobia	31.8	31.8	11.30	10.70	10.90	20.10	20.00	19.00	31.10	25.10	28.10
β-Proteobacteria	9.8	41.6	10.60	8.71	7.33	4.79	5.00	4.42	3.33	4.44	3.81
Gemmatimonadetes	7.6	49.1	7.50	4.87	4.34	3.34	3.81	2.28	1.41	2.88	1.74
Actinobacteria	7.3	56.5	9.90	10.50	13.30	9.75	11.80	13.70	9.96	11.60	10.20
α-Proteobacteria	6.4	62.8	12.20	14.00	14.60	13.40	12.70	13.20	10.20	12.20	11.00
Acidobacteria	6.2	69.0	16.30	16.40	16.80	17.20	14.40	15.20	15.00	13.70	15.30
Firmicutes	4.9	73.8	2.97	3.94	3.38	1.64	3.39	2.11	0.91	2.35	1.60
Chloroflexi	3.9	77.7	3.92	4.12	4.93	3.82	2.93	3.95	2.26	2.65	2.63
δ-Proteobacteria	3.5	81.2	5.45	5.33	4.96	5.77	5.83	5.68	6.00	5.70	7.23
Bacteroidetes	3.3	84.5	5.47	5.82	6.12	4.34	4.75	5.98	5.51	4.96	4.18
γ-Proteobacteria	3.1	87.6	3.43	4.83	3.62	4.35	4.06	3.98	3.27	4.64	3.93
Planctomycetes	3.0	90.6	4.71	4.32	5.37	5.28	5.22	5.46	7.00	5.03	5.63
Nitrospirae	2.3	92.9	1.27	1.45	0.44	2.15	1.52	1.75	1.21	1.47	1.79
Cyanobacteria	2.0	94.9	1.33	1.71	0.64	0.70	0.84	0.36	0.23	0.56	0.34
WS3 Latescibacteria	1.8	96.7	0.79	0.54	0.45	1.59	1.28	0.91	0.66	0.83	1.03
Crenarchaeota	1.4	98.0	0.51	0.69	0.23	0.77	1.02	0.60	0.06	0.44	0.27
Armatimonadetes	1.3	99.3	0.97	0.73	0.71	0.48	0.62	0.36	0.09	0.24	0.17

Post-hoc comparisons of means significantly different in the permanent treatment are indicated in bold; significantly different means within groups compared to the corresponding permanent treatment are underlined