Table 1.

Characteristics of sampling sites and measured environmental factors.

Sample	Station	Latitude [N]	Longitude [E]	Sampling depth (m)	Temperature (°C)	Salinity (ppt)	NH4+ (μmol L-1)	NO2- (μmol L-1)	NO3- (μmol L-1)	PO43- (μmol L-1)
A2S	A2	22.6528	113.7168	0.5	30.06	1.4	2.14	2.34	134.52	1.44
A2B	A2	22.6528	113.7168	12	30.06	1.6	3.58	2.41	135.52	1.48
A6S	A6	22.4118	113.7701	0.5	29.07	3.3	5.6	5.29	107.84	1.26
A6B	A6	22.4118	113.7701	28	27.79	23.5	4.57	5.47	40.91	0.96
A10S	A10	22.1377	113.7943	0.5	29.02	19.5	6.84	3.67	55.65	0.73
A10B	A10	22.1377	113.7943	18	26.98	32.2	5.82	2.69	8.83	0.68
A12S	A12	22.0406	113.8739	0.5	29.87	17.2	0.84	3.7	61.31	0.66
A12B	A12	22.0406	113.8739	9	24.23	34	0.5*	1.17	7.21	0.51
A14S	A14	21.9639	113.9376	0.5	32.02	14.4	4.55	0.88	50.62	0.17*
A14B	A14	21.9639	113.9376	7	23.27	34	0.79	1.97	4.01	0.32
F504S	F504	22.0388	114.1124	0.5	31.72	15.50	0.5*	0.71	45.78	0.17*
F504B	F504	22.0388	114.1124	27.0	22.98	34.70	0.5*	1.30	2.41	0.25
F404S	F404	21.9040	113.7789	0.5	29.11	19.70	0.5*	3.27	52.83	0.17*
F404B	F404	21.9040	113.7789	27.0	24.87	34.20	0.5*	0.77	7.59	0.53
F303S	F303	21.8837	113.5500	0.5	29.52	30.10	0.5*	0.68	5.42	0.17*
F303B	F303	21.8837	113.5500	21.0	29.32	33.20	0.5*	0.14	0.67	0.17*
F603S	F603	22.0326	114.3365	0.5	29.08	33.20	0.5*	0.13	1.74	0.17*
F603B	F603	22.0326	114.3365	35.0	22.08	34.40	0.5*	0.31	3.21	0.35

^∗Lower than the limit of detection.