| Report Year: 2007 |
| Big Spirit Lake, Dickinson County |
| Phytoplankton |
| | 6/19/2007 | 7/9/2007 | 7/17/2007 | 2007 | 2006 | 2005 |
| Division | Wet Mass (mg/L) | Wet Mass (mg/L) | Wet Mass (mg/L) | Wet Mass (mg/L) | Wet Mass (mg/L) | Wet Mass (mg/L) |
| Bacillariophyta | 0.019 | 0.000 | 0.000 | 0.006 | 0.650 | 0.992 |
| Chlorophyta | 0.322 | 0.129 | 0.000 | 0.150 | 0.038 | 12.674 |
| Cryptophyta | 0.023 | 0.000 | 0.000 | 0.008 | 0.056 | 22.402 |
| Cyanobacteria | 177.418 | 228.461 | 72.178 | 159.353 | 379.234 | 153.520 |
| Euglenophyta | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.036 |
| Total | 177.783 | 228.590 | 72.178 | 159.517 | 379.978 | 189.623 |
| Taxonomic Richness | 6 | 4 | 3 | 4 | 7 | 10 |
|