Environmental Engineering Reference
In-Depth Information
(a) 10- to 14-d
Hyalella azteca
100
r
2
= 0.73
80
r
2
= 0.78
60
40
20
Survival or growth
Survival only
0
10
-2
10
-1
10
0
10
1
10
2
(b) 28- to 42-d
Hyalella azteca
100
r
2
= 0.93
r
2
= 0.79
80
60
40
20
0
10
-2
10
-1
10
0
10
1
10
2
(c) 10- to14-d
Chironomus
spp.
100
r
2
= 0.56
80
r
2
= 0.76
60
40
20
0
10
-2
10
-1
10
0
10
1
10
2
Geometric mean of mean PEC quotient
Fig. 7.2
Relation between mean probable effect concentration quotient (PEC quotient) toxicity in and the incidence of freshwater
toxicity tests.
From USEPA (2000b).
