TABLE 1.

One-way ANOSIM results for structure of total and active nirK denitrifier communities as determined by DGGE banding profiles from nirK genes and transcripts based on data for different sampling dates

Comparison between dates	ANOSIM resultsa for structure of total or active nirK denitrifying communities
	Total nirK						Active nirK
	H		F		Hp		H		F		Hp
	P	R	P	R	P	R	P	R	P	R	P	R
April vs May	0.11	0.24	ND	ND	ND	ND	0.54	0	ND	ND	ND	ND
April vs June	0.03	0.87	ND	ND	ND	ND	0.4	0.04	ND	ND	ND	ND
April vs July	0.03	1	ND	ND	ND	ND	0.03	0.55	ND	ND	ND	ND
April vs Aug	0.03	0.92	ND	ND	ND	ND	0.03	0.84	ND	ND	ND	ND
May vs June	0.03	0.75	0.03	1	ND	ND	0.6	0.03	0.06	0.39	ND	ND
May vs July	0.03	1	0.03	0.95	ND	ND	0.06	0.31	0.14	0.17	ND	ND
May vs Aug	0.03	0.94	0.03	0.98	ND	ND	0.17	0.15	0.06	0.48	ND	ND
June vs July	0.17	0.16	0.03	0.79	0.03	0.83	0.09	0.27	0.54	0.04	0.37	0.08
June vs Aug	0.03	0.63	0.03	0.97	0.03	0.71	0.03	0.31	0.09	0.41	0.43	0.07
July vs Aug	0.03	0.94	0.09	0.26	0.03	0.74	0.03	0.53	0.4	0.06	0.94	0.02

^aANOSIM results are for analysis by sampling date at three locations, H, F, and Hp, in soil under potato cultivation. The R values indicate the degree of discrimination between two groups; P values indicate the significance level (values in bold indicate P ≤ 0.05). ND, not determined.