Table 1.

Significance tests of the effects of clipping and year on the overall microbial community structures across 5 years and in each year by the non-parametric multivariate analysis of variance.

	16S rRNA		ITS		GeoChip
	R2	P	R2	P	R2	P
Year	0.169	0.002	0.183	0.001	0.481	0.001
Clipping	0.025	0.352	0.028	0.179	0.028	0.020
Year × clipping	0.103	0.208	0.096	0.313	0.228	0.001
2010 clipping	0.178	0.183	0.176	0.287	0.291	0.115
2011 clipping	0.143	0.506	0.142	0.434	0.306	0.026
2012 clipping	0.178	0.210	0.221	0.058	0.731	0.034
2013 clipping	0.125	0.632	0.121	0.855	0.256	0.049
2014 clipping	0.132	0.605	0.110	0.756	0.241	0.027

Bold values indicate P < 0.05.