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MERC ER01-10
8
7. Results Trial 2 (STDN-01): 22 – 27 October 2009
Physical Parameters
TSS
mg/l
DOC
mg/l
POC
mg/l
T0 Initial
Ave
StDev
Ave
StDev
Ave
StDev
Conditions
28.7
5.1
3.98
0.14
2.912
0.163
Temp
o
C
Salinity
psu
Dis. Oxygen
mg/l
Turbidity
NTU
Ave
StDev
Ave
StDev
Ave
StDev
Ave
StDev
T0 Control
16.00
0.00
12.14
0.01
8.48
0.04
9.70
0.85
T0 Treated
16.02
0.00
12.17
0.01
8.59
0.05
8.92
0.64
TF Control
15.86
0.01
12.14
0.01
7.34
0.04
1.99
0.12
TF Treated
15.85
0.00
12.23
0.00
8.63
0.02
3.46
0.10
Live Organisms > 50
µ
m
T0 Ave
#/m
3
T0 StDev
#/m
3
TF Ave
#/m
3
TF StDev
#/m
3
Control
70,000
5,625
30,000
1,500
Treated
No data
0.2
0.4
* Taxa listed in order of abundance.
Live Organisms 10 - 50
µ
m
Vital Stain Results -
It is important to note that the specific approach used underestimates
the abundances of live organisms in this size class because it has been found that not all live
organisms reliably take up the CMFDA stain.
T0 Ave #/ml
T0 StDev #/ml
TF Ave #/ml
TF StDev #/ml
Control
267
14.8
38
25.6
Treatment
0
0
0
0
Lugol’s Total Counts
- This approach commonly overestimates the abundances of live
organisms in this size class because all individuals in fixed samples are counted unless obviously
dead (significant damage to organism). Lugol’s staining alone does not distinguish live from
dead cells.
*TF Control
*TF Treated
Copepoda nauplii
Harpacticoida
Spionid polychaete
Calanoida (
Acartia
sp.)
Cyclopoida (
Oithona
sp.)
Harpacticoida
Nematoda