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MERC ER02-10
9
6.2. Trial 2 (SIE-05-10): 13-18 May 2010
Presented as means and standard deviations.
Physical Parameters
TSS
mg/l
DOC
mg/l
POC
mg/l
T0 Ambient
11.5 (1.0)
3.41 (0.13)
1.11 (0.03)
T0 Enhanced
65.2 (8.5)
NA
5.88 (0.79)
Enhanced data is the average of 3 time points (2 reps per time point) during the fill time of the ballast tanks.
Ambient water is sampled at the beginning of the trial and before the water is enhanced.
Temp
o
C
Salinity
psu
Dis. Oxygen
mg/l
Turbidity
NTU
pH
T-0 Control
15.15 (0.01)
8.19 (0.02)
8.54 (0.06)
15.60 (0.87)
7.3 (0.1)
T-0 Treated
15.20 (0.01)
8.84 (0.01)
9.02 (0.02)
15.11 (1.24)
7.3 (0.1)
T-F Control
16.53 (0.06)
8.15 (0.00)
6.92 (0.06)
3.49 (0.23)
7.2 (0.2)
T-F Treated
16.52 (0.05)
8.76 (0.00)
8.74 (0.03)
5.27 (0.42)
7.1 (0.1)
Live Organisms > 50
µ
m
T0
#/m
3
*TF
#/m
3
Control
60,000 (10,500)
90,500 (10,000)
ŧ
Treated
4.2 (7)
0.2 (0.4)
*Note moderate increase between T0 and TF in Control tank (reproduction and hatching of eggs).
*TF Control
*TF Treated
Copepod nauplii
Polycheata (Spionidae)
Calanoida
(Acartia sp.)
Polychaeta (Spionidae)
Harpacticoida
* Up to four top 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 these stains.
T0 #/ml
TF #/ml
Control
1,915 (511)
3,182 (725)
Treatment
1.7 (1.2)
6 (3.8)
Dominant species
Type
Other
Heterocapsa rotundatum
Dinoflagellate
Gymnodinium sp.
Dinoflagellate
Thalassiosira gravida
Diatom
chain-forming
Navicula sp.
Diatom