Table 3.
Summary of levels of light intensity exposure and ecological hierarchy in studies of toxin accumulation.
| Light intensity |
Cyanobacteria/Setting | Reference |
|---|---|---|
| μmole/m2/s (W/m2) | ||
| 16 (3.5) | Cyanobacterial populations (Microcystis PCC7806, Synechocystis J341, and Synechocystis PCC6803)/Lab | Downing et al. (2011), and 2012 |
| 20 (4.4) | Cyanobacterial populations (Synechocystis PCC6803)/Lab | Downing et al. (2015) |
| 36.3 (7.9) | Cyanobacterial populations (Microcystis aeruginosa 905 and 315)/Lab | Fan et al. (2015) |
| 51 (11.1) | Biocrust mixed communities/Lab | Present study |
| 108.9 (23.7) | Cyanobacterial populations (Microcystis aeruginosa 905 and 315)/Lab | Fan et al. (2015) |
| 217.8 (47.4) | Cyanobacterial populations (Microcystis aeruginosa 905 and 315)/Lab | Fan et al. (2015) |
| 326.7 (71.1) | Cyanobacterial populations (Microcystis aeruginosa 905 and 315)/Lab | Fan et al. (2015) |
| 430 (93.5) | Biocrust mixed communities/Lab | Present study |
| 825.2 (179.6)a | Biocrust mixed communities/Field | Richer et al. (2015) |
| 970 (210.9) | Biocrust mixed communities/Lab | Present study |
| 1900 (413) | Biocrust mixed communities/Lab | Present study |
a
Extrapolated from the 1983–2005 record for Global Horizontal Irradiance for Qatar (SSE 2017) for the months of October/November, when this study took place.