Shifts of Bacterioplankton Metabolic Profiles along the Salinity Gradient in a Subtropical Estuary
Table 3
Average nitrogen use index and total inorganic nitrogen and phosphorus pools.
Season
Site
DIN*(µM)
DIP**(µM)
N/P
NUSE***
SE
Summer
A1
18.5
3.1
6.0
38.3
1.7
A2
7.1
2.5
2.9
33.5
8.0
A3
3.8
1.0
3.9
20.8
8.7
A4
2.2
0.7
3.0
13.7
8.3
Fall
A1
11.1
1.7
6.4
38.6
1.7
A2
3.0
1.6
1.9
32.8
2.3
A3
6.4
1.4
4.6
64.3
18.0
A4
2.9
0.7
4.1
17.2
10.5
Winter
A1
1.7
1.1
1.6
41.7
8.3
A2
1.8
0.7
2.8
36.1
7.3
A3
4.8
0.7
6.8
13.3
13.3
A4
1.3
0.3
4.9
44.4
29.4
Spring
A1
2.8
1.6
1.7
25.7
8.7
A2
1.4
0.8
1.7
25.0
14.4
A3
2.7
0.7
4.0
23.1
12.9
A4
3.7
0.5
7.8
30.2
16.6
DIN: dissolved inorganic nitrogen.
**DIP: dissolved inorganic phosphorus. Data are adapted from Table 1.
***NUSE: nitrogen use index. Data are mean standard error (SE).
