Table 14.1. Field data from primary productivity assays using the oxygen and 14C light and dark bottle techniques.
Oxygen method
14C method
Light bottles
Initial bottles
Light bottles
(a)
(b)
Dark bottles
(mg O
2 /1)
(mg O
2/1)
Dark bottles
Volume
Volume
Volume
Depth(m)
(a)
(b)
(a)
(b)
(mg O
2 /1)
cps
(ml)
cps
(ml)
cps
(ml)
0
8.41
8.31
8.59
8.66
8.29
4.85
125
4.58
121
0.63
124
0.5
8.36
8.50
8.81
8.72
8.05
5.68
124
5.21
119
0.68
126
1
8.43
8.48
8.91
8.99
8.09
8.36
129
8.91
128
0.71
121
2
9.12
9.06
10.36
10.48
8.01
14.10
125
14.39
131
1.21
129
3
9.26
9.16
10.51
10.63
8.20
13.91
122
13.62
128
0.91
125
4
8.51
8.49
9.47
9.55
8.15
9.63
126
9.52
123
0.71
125
5
8.31
8.39
9.03
9.10
8.01
6.13
127
5.91
121
0.49
124
6
8.00
8.09
8.41
8.36
7.71
3.43
126
3.89
131
0.41
126
7
7.12
7.19
7.25
7.33
6.81
2.10
129
2.01
127
0.36
127
10
5.82
5.71
5.91
5.83
5.00
1.05
128
0.98
129
0.21
121
12
2.36
2.47
2.31
2.50
1.95
0.51
129
0.86
127
0.75
125
Oxygen Method
14C Method
Incubation: 4
h 35
min
14C added/bottle: 1.0
ml
Diurnal expansion factor: 2.62
J-lCi/ml: 3.86
Counter efficiency: 76.4 ~,~
ml filtered: 50
ml
Time of incubation: 0932
to 1348
h
Diurnal expansion factor: 2.51
Total
alkalinity
(mg/I)
pH
48.6
7.80
48.3
7.80
48.5
7.81
48.4
7.90
48.9
7.92
51.6
7.81
56.1
7.75
56.8
7.72
57.9
7.62
60.2
7.45
62.1
7.40
Temperature
DC
23.0
23.0
23.0
22.8
21.9
20.0
17.3
14.4
10.6
8.1
7.8
N
N
N
m
>II
CD
~
iii·
CD
...
~