Spatial Distributions of Picoplankton and Viruses in the Changjiang Estuary and Its Adjacent Sea Area during Summer

Table 1

List of the measured environmental parameters in the Changjiang estuary and its adjacent sea area in June 2006.

Parameter	Section I	Section II	Section III	Total station
Number of sample	39	45	15	96
Salinity (psu)
Range	0.00–33.92	14.86–34.42	29.79–34.13	0.00–34.42
Mean ± SD	20.49±14.09	30.13±4.41	32.41±1.58	26.62±10.69
CV	69%	15%	5%	40%
Turbidity (FTU)
Range	0.07–122.13	0.45–122.13	0.00–32.43	0.00–122.13
Mean ± SD	57.84±57.09	22.77±27.97	3.68±8.29	31.78±44.77
CV	99%	123%	225%	141%
Nitrate (μg L^−1)
Range	11.89–1645.36	19.47–342.04	11.41–128.93	11.41–1645.36
Mean ± SD	493.43±503.65	162.73±84.10	45.65±38.18	275.06±372.35
CV	103%	52%	84%	135%
Nitrite (μg L^−1)
Range	0.11–34.44	0.95–12.69	0.11–11.55	0.11–34.44
Mean ± SD	5.70±6.86	4.90±2.64	3.31±3.21	5.11±5.48
CV	120%	54%	97%	107%
Ammonia (μg L^−1)
Range	3.62–63.93	26.31–130.22	17.97–123.74	3.62–130.22
Mean ± SD	39.23±17.28	55.09±17.83	56.20±25.69	50.01±20.37
CV	44%	32%	46%	41%
Phosphate (μg L^−1)
Range	2.53–43.57	2.21–30.96	0.98–12.45	0.98–43.57
Mean ± SD	17.90±11.91	13.28±7.06	5.34±3.14	13.63±10.20
CV	67%	53%	59%	75%
Silicate (μg L^−1)
Range	55.22–3027.20	157.57–1144.37	33.43–243.76	33.43–3027.20
Mean ± SD	936.83±898.12	405.36±195.53	151.69±69.83	576.29±659.66
CV	96%	48%	46%	114%