Environmental Engineering Reference
In-Depth Information
Table 5.4
(continued)
Species
Correlation coefcient (r) between phytoplankton cell
carbon and salinity
p value
A
B
C
A
B
C
Cymbella marina
0.0415
−
0.3165
−
0.3705
IS
IS
IS
Nitzschia sigma
0.3280
0.3674
0.3703
IS
IS
IS
−
−
−
Nitzschia closterium
0.3477
0.3463
0.3847
IS
IS
IS
−
−
−
Ceratium furca
−
0.2220
−
0.3118
−
0.3300
IS
IS
IS
Trichodesmium erythraea
0.3508
0.4193
0.3436
IS
IS
IS
Chlorella marina
−
0.7043
−
0.7633
−
0.7201
<0.01
<0.01
<0.01
350
300
250
200
150
y = 0.0629x + 39.312
R
2
= 0.7416
100
50
0
0
500
1000
1500
2000
2500
3000
3500
4000
4500
Cell volume (um
3
)
m
3
) for cyanobacteria and green algae
Fig. 5.5
Inter-relationship between cell carbon content (pg) and cell volume (
µ
in central sector
350
300
250
200
150
y = 0.061x + 45.65
R = 0.714
2
100
50
0
0
500
1000
1500
2000
2500
3000
3500
4000
4500
Cell volume (um
3
)
m
3
) for cyanobacteria and green algae
Fig. 5.6
Inter-relationship between cell carbon content (pg) and cell volume (
µ
in western sector
also add a new dimension to cadmium, which,
otherwise, is considered as toxic metal. The
research can also throw light on the direct pro-
portionality of metals and nutrients in oceans. The
essential metals are scarce where nutrients are
scarce because the metals are taken in and used by
organisms to help them utilize the available
nutrients. Again, the metals are abundant where
nutrients are abundant because organisms decay,
liberating both nutrients and metals.
Cullen et al. (
1999
) also observed, in labora-
tory cultures of
, an inverse corre-
lation between the concentration of the cadmium-
containing carbonic anhydrase and dissolved
carbon dioxide and zinc. Taken together, these
results
T. weissflogii
—
one from the laboratory and one from the
