| Report Year: 2009 |
| Browns Lake, Woodbury County |
| Phytoplankton |
| | 6/1/2009 | 7/6/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| 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) | Wet Mass (mg/L) | Wet Mass (mg/L) | Wet Mass (mg/L) | Wet Mass (mg/L) | Wet Mass (mg/L) |
| Bacillariophyta | 2.364 | 6.382 | 4.373 | 0.000 | 6.547 | 2.943 | 0.505 | 2.142 | 1.794 | 0.101 | 3.390 |
| Chlorophyta | 6.123 | 0.827 | 3.475 | 0.000 | 0.395 | 1.689 | 0.456 | 0.772 | 1.538 | 1.739 | 0.950 |
| Chrysophyta | 0.000 | 0.043 | 0.021 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Cryptophyta | 1.492 | 1.038 | 1.265 | 0.000 | 0.000 | 1.537 | 0.113 | 0.216 | 0.025 | 0.029 | 0.388 |
| Cyanobacteria | 85.870 | 437.068 | 261.469 | 0.000 | 26.918 | 4.920 | 26.937 | 18.067 | 131.460 | 0.345 | 11.040 |
| Dinophyta | 7.252 | 11.577 | 9.415 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.959 | 1.475 |
| Euglenophyta | 0.000 | 0.725 | 0.363 | 0.000 | 0.000 | 0.299 | 0.088 | 0.058 | 0.142 | 0.005 | 0.033 |
| Total | 103.102 | 457.661 | 280.381 | 0.000 | 33.860 | 11.388 | 28.100 | 21.255 | 134.960 | 3.178 | 17.277 |
| Taxonomic Richness | 24 | 42 | 33 | 0 | 26 | 15 | 12 | 11 | 11 | 10 | 7 |
| Cyanobacteria Cell Counts(k)/ml | 61.426 | 317.958 | 189.692 | 0.000 | 19.154 | 29.669 | 19.650 | 14.977 | 103.803 | 1.276 | 29.368 |
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