TABLE 3.

PERMANOVA results for bacterial communities divided by year and root proximity

Year	Parametera	r2	P value	Root proximity	Parametera	r2	P value
2015	L	0.23	0.001	Bulk	L	0.15	0.001
	LUH	0.21	0.001		LUH	0.21	0.001
	RP	0.04	0.001		Y	0.04	0.001
	L × LUH	0.14	0.001		L × LUH	0.09	0.001
	L × RP	0.02	0.008		L × Y	0.06	0.001
	LUH × RP	0.01	0.006		LUH × Y	0.03	0.001
	L × LUH × RP	0.02	0.076		L × LUH × Y	0.04	0.001
2016	L	0.14	0.001	Rhizo	L	0.13	0.001
	LUH	0.21	0.001		LUH	0.17	0.001
	RP	0.03	0.001		Y	0.04	0.001
	L × LUH	0.1	0.001		L × LUH	0.09	0.001
	L × RP	0.015	0.064		L × Y	0.05	0.001
	LUH × RP	0.011	0.04		LUH × Y	0.03	0.001
	L × LUH × RP	0.012	0.33		L × LUH × Y	0.04	0.001

^aL, location; LUH, land use history; RP, root proximity; Y, year.