Table 2 Test and modelled results: bioassay (mean and SD values) and BLM results (µg Cu/L) for the crustacean and algae species compared as well as the eventual significance (p value)

D. magna

 LC₅₀

8.53 ± 1.16

34.9 ± 1.78

34.3 ± 2.67

128 ± 23

 BLM LC₅₀

17.4

40.0

61.7

92.5

 p value LC50/BLM

0.025*

1.0

0.48

<0.001*

D. pulex

 LC₅₀

7.6 ± 1

30.4 ± 2

–

–

 BLM LC₅₀

10.2

19.6

30.3

45.3

 p value LC50/BLM^a

P. subcapitata

 EC₅₀

1.4 ± 0.2

27.4 ± 2.5

20.8 ± 0.4

111 ± 8.7

 BLM NOEC

9.8

127

185

287

 p value EC50/BLM

<0.001*

<0.001*

<0.001*

0.365

PNEC

4.9

14.5

20.6

31.4