Table 1 Assay performance summary.

From: Toxicity of the herbicides diuron, propazine, tebuthiuron, and haloxyfop to the diatom Chaetoceros muelleri

Herbicide

pH rangea

Specific growth rate (SGR day−1)

Ref. (%)

Photosynthetic efficiency (ΔF/Fm′)

Ref. (%)

SWC

CV (%)

SWC

CV (%)

Diuron

8.17–8.52

1.68 ± 0.05

3

21.0 ± 2.79

0.451 ± 0.007

2

44.8 ± 0.75

Propazine

8.16–8.39

1.49 ± 0.07

5

24.1 ± 1.42

0.478 ± 0.005

1

41.0 ± 3.19

Tebuthiuron

8.00–8.41

1.56 ± 0.03

2

25.4 ± 2.45

0.468 ± 0.007

2

39.2 ± 0.53

Haloxyfop

7.99–8.24

1.41 ± 0.05

3

21.1 ± 1.57

0.418 ± 0.02

5

56.5 ± 4.86

  1. Seawater pH range, seawater control (SWC) measurements of specific growth rate (SGR day−1) and photosynthetic efficiency (ΔF/Fm′), percent coefficient of variation (% CV) and reference diuron (4 µg L−1) percent inhibition effect (Ref. (%)) of each herbicide test (mean ± SD; n = 5 per treatment). All physicochemical measurement data can be found in Table S-3.
  2. aRange of pH from 0–72 h across treatments (Table S-3).
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