Contribution of the Types of Tropical Coastal Aquaculture Ponds to the Differential Distribution of the Family Bacillaceae Bacterial Community

Table 2

Physicochemical parameters of sampling stations in the artificial ponds and earthen ponds.

No.	pH	Salinity (‰)	DO (mg/L)	COD (mg/L)	NH4^+-N (mg/L)	NO3^−-N (mg/L)	NO2^−-N (mg/L)
Artificial ponds in Changjiang
A1	8.270	34.50	6.44	34.5	0.003	0.003	0.001
A2	8.410	34.67	5.75	83.0	0.000	0.000	0.012
A3	8.740	34.62	6.41	80.0	0.006	0.000	0.046
A4	7.966	34.87	6.27	86.0	0.000	0.008	0.024
A5	7.540	34.14	6.03	74.5	0.003	0.003	0.001
A6	8.110	34.00	7.03	74.5	0.011	0.012	0.010
Earthen ponds in Wenchang
E1	7.770	25.68	3.12	129.6	0.265	0.025	0.906
E2	7.660	21.87	2.82	74.8	3.009	0.074	0.740
E3	7.410	26.58	2.95	141.0	1.267	0.027	0.250
E4	7.525	29.88	2.42	140.0	0.918	0.025	0.907
E5	7.494	26.30	2.61	82.0	2.203	0.073	0.196
E6	7.280	26.00	3.01	147.0	2.362	0.448	0.987