Shifts of Bacterioplankton Metabolic Profiles along the Salinity Gradient in a Subtropical Estuary
Table 1
Physicochemical data, bacterial abundances, and the percent of positive substrates in the Biolog EcoPlates.
Sampling site*
Date month day, year
Temp** (°C)
Salinity
pH
DO %
µg-N L−1
µg-N L−1
µg-N L−1
µg-P L−1
Bacterioplankton (106 cells mL−1)
Phototrophic nanoplankton (104 cells mL−1)
Percent of positive substrates (96 h)***
(SD)
A1
Aug 11, 2010
31.6
2.0
nd****
nd
126.8
13.1
119.3
96.2
2.1
1.4
75.3
9.3
A2
Aug 11, 2010
31.6
2.0
nd
nd
41.4
2.6
55.3
76.3
2.9
3.2
62.4
6.7
A3
Aug 11, 2010
31.0
14.5
nd
nd
32.2
1.6
18.7
30.0
2.4
3.1
28.0
9.9
A4
Aug 11, 2010
32.4
27.5
nd
nd
22.6
1.4
7.1
23.1
2.1
6.1
23.7
1.9
A1
Oct 13, 2010
26.7
2.7
7.8
80.0
48.1
4.5
103.4
54.2
2.7
5.1
75.3
6.7
A2
Oct 13, 2010
26.2
7.1
8.0
91.4
27.0
2.5
11.8
48.1
2.8
8.7
25.8
8.5
A3
Oct 13, 2010
26.7
18.1
8.0
92.3
68.0
2.8
18.4
43.2
1.6
5.3
24.7
6.7
A4
Oct 13, 2010
26.9
29.4
8.2
115.0
36.2
1.5
2.8
22.0
1.2
3.6
35.5
6.5
A1
Feb 10, 2011
21.1
7.5
7.3
147.9
20.6
0.9
2.3
33.1
2.3
0.18
34.4
7.4
A2
Feb 10, 2011
20.8
15.2
7.3
126.7
24.5
0.8
0.2
20.3
2.9
3.1
14.0
4.9
A3
Feb 10, 2011
20.4
26.2
7.2
134.9
54.4
1.6
11.0
21.8
1.6
2.8
8.6
6.7
A4
Feb 10, 2011
19.9
32.8
7.1
133.3
16.0
0.5
1.3
8.1
0.6
0.55
8.6
1.9
A1
Apr 14, 2011
27.2
12.2
7.3
129.4
29.7
3.4
5.6
49.4
5.4
4.4
20.4
3.7
A2
Apr 14, 2011
27.3
19.4
7.3
113.0
18.0
0.7
0.3
24.5
2.4
10.3
9.7
3.2
A3
Apr 14, 2011
26.9
27.6
7.1
108.2
33.7
0.9
2.7
20.9
0.9
3.1
21.5
10.4
A4
Apr 14, 2011
25.3
35.0
7.3
113.7
40.1
2.8
8.4
14.5
1.6
2.0
21.5
8.1
The average water depth and coordinate of each sampling site is as follows: A1 (2.4 m, 26° 40.89′N, 81° 50.04′W), A2 (2.9 m, 26° 38.19′N, 81° 53.32′W), A3 (2.6 m, 26° 31.84′N, 81° 57.94′W), and A4 (4.1 m, 26° 28.83′N, 82° 03.64′W).
**Temp: surface water temperature. The temperature data on August 11, 2010, are adapted from the mean August data collected between 2004 and 2009 because of missing data.
***Percent of positive substrates is calculated from 96 h incubation datasets. Data are mean standard deviation (n = 3).
****nd: no data.
