Pearson correlation coefficients between nitrifying communities and local factors and catchment land uses (N = 35).

	AOA				AOB				AOA/AOB
	Chao1	Shannon	Simpson	Abundance	Chao1	Shannon	Simpson	Abundance	Abundance ratio
Depth	0.14	0.26	−0.28	−0.04	−0.08	−0.12	0.13	−0.02	−0.13
SD	−0.02	−0.01	0.01	−0.34a	−0.15	−0.27	0.25	−0.44b	−0.31
TOC	−0.34	−0.29	0.28	0.14	0.46b	0.46b	−0.49b	0.29	−0.04
TN	−0.07	−0.09	0.11	−0.08	0.17	0.17	−0.25	0.02	−0.10
TP	−0.31	−0.27	0.24	0.07	−0.01	0.11	−0.20	0.19	0.00
Chl-a	−0.08	−0.02	0.03	0.43a	0.28	0.39a	−0.37a	0.60b	0.35a
TSI	−0.14	−0.11	0.07	0.32	0.05	0.12	−0.16	0.39a	0.27
Moisture	0.03	0.22	−0.26	−0.19	−0.11	−0.18	0.16	−0.23	−0.11
Density	−0.05	−0.07	0.08	0.11	−0.09	−0.02	0.02	0.15	0.09
STC	−0.29	−0.29	0.28	−0.01	0.10	0.05	−0.08	0.09	−0.11
STN	−0.12	−0.14	0.12	−0.07	0.00	−0.09	0.10	−0.08	−0.11
NH4+	−0.04	−0.07	0.05	−0.17	−0.05	−0.06	0.05	−0.20	−0.18
NO3−	0.22	0.23	−0.23	0.04	−0.30	−0.24	0.20	0.02	0.18
Richness	0.10	0.14	−0.13	−0.21	0.00	−0.03	0.01	−0.26	−0.12
Biomass	0.09	−0.02	0.06	−0.17	0.19	0.14	−0.11	−0.20	−0.13
Catchment agriculture	−0.23	−0.35	0.38a	−0.18	0.39a	0.44b	−0.49b	0.09	−0.33
Catchment built-up land	0.01	−0.02	0.01	0.10	0.02	0.03	−0.01	−0.04	0.24
Catchment vegetation	0.22	0.36a	−0.36a	−0.08	−0.33a	−0.37a	0.33a	−0.17	−0.01

^a P < 0.05.

^b P < 0.01; see Table 1 for the abbreviations.