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MERC ER02-09
12
Live Organisms 10 - 50
µ
m
Vital Stain Results
Note: the CMFDA stain technique commonly underestimates the abundance of live
organisms in this size class because not all live organisms reliably take up this stain.
T0 Ave
#/ml
T0 StDev
#/ml
TF Ave
#/ml
TF StDev
#/ml
Control
1,259
88
68
20
Treated
91
26
12
5
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
764
176
211
80
Dinoflagellate
255
47
106
24
Treated
Diatom
324
137
38
6
Dinoflagellate
128
46
18
2
Note: 2489 #/ml = Average counts for T-Final-Treated, for picoplankton <10µm.
Dominant species
Type
Heterocapsa rotundatum
Dino
Gyrodinium estuariale
Dino
Prorocentrum minimum*
Dino
Chaetoceros
sp.
Diatom
misc. Copepod nauplii
Microcystis
sp.* (4-5
µm
) Cyanobacteria
* Know harmful algal species.
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
10.22
0.44
1.11
0.17
Treated
8.76
1.41
5.56
0.25
Regrowth Control
-
-
16.39
5.58
Regrowth Treated
-
-
0.12
0.03