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MERC ER02-09
10
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).
T0 Ave
#/ml
T0 StDev
#/ml
TF Ave
#/ml
TF StDev
#/ml
Control
Diatom
41
17
48
18
Dinoflagellate
21
12
16
4
Treated
Diatom
22
15
3
2
Dinoflagellate
10
10
1
1
Note: 2552 #/ml = Average counts for T-Final-Treated, for picoplankton <10µm.
Dominant species
Type
Amphora
sp.
Diatom
Gyrodinium estuariale
Dino
Thalassiosira
sp.
Diatom
Heterocapsa rotundatum
Dino
Active Chlorophyll-a
Chlorophyll is used as ancillary data and as a general presence/ absence indicator of
viable photosynthetic organism. MDL = 0.56
µg
T0 Ave
µg/l
T0 StDev
µg/l
TF Ave
µg/l
TF StDev
µg/l
Control
6.20
0.51
2.99
0.38
Treated
5.25
0.46
2.44
0.14
Regrowth Control
-
-
60.00
27.31
Regrowth Treated
-
-
0.07
0.09
Live Indicator Pathogens
CFU = colony forming units
E. coli
T0 Ave
cfu/100ml
T0 StDev
cfu/100ml
TF Ave
cfu/100ml
TF StDev
cfu/100ml
Control
22.40
2.70
0.20
0.45
Treated
0.00
0.00
0.00
0.00
Enterococci
T0 Ave
cfu/100ml
T0 StDev
cfu/100ml
TF Ave
cfu/100ml
TF StDev
cfu/100ml
Control
21.14
8.43
10.12
4.93
Treated
0.2
0.45
0.00
0.00
V. cholerae
No detectable culturable toxigenic
Vibrio cholerae
were detected in any samples during
any of the trials.