| Report Year: 2009 |
| East Okoboji Lake, Dickinson County |
| Phytoplankton |
| | 6/3/2009 | 7/8/2009 | 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 | 0.214 | 0.030 | 0.122 | 0.590 | 0.355 | 10.009 | 3.519 | 0.025 | 4.220 | 0.169 | 0.055 |
| Chlorophyta | 4.119 | 0.593 | 2.356 | 0.147 | 0.008 | 0.017 | 0.003 | 0.588 | 0.322 | 0.000 | 0.000 |
| Chrysophyta | 0.333 | 0.000 | 0.166 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.001 | 0.000 | 0.001 |
| Cryptophyta | 0.726 | 0.000 | 0.363 | 0.104 | 0.015 | 0.097 | 0.023 | 0.039 | 0.000 | 0.002 | 0.001 |
| Cyanobacteria | 54.833 | 11.919 | 33.376 | 101.806 | 118.315 | 107.823 | 17.162 | 17.358 | 106.871 | 0.948 | 10.152 |
| Dinophyta | 0.000 | 0.000 | 0.000 | 0.000 | 0.005 | 0.000 | 0.000 | 0.000 | 0.000 | 0.060 | 0.000 |
| Euglenophyta | 0.088 | 0.086 | 0.087 | 0.000 | 0.000 | 0.021 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Total | 60.313 | 12.628 | 36.470 | 102.647 | 118.698 | 117.966 | 20.707 | 18.011 | 111.415 | 1.180 | 10.208 |
| Taxonomic Richness | 22 | 18 | 20 | 5 | 7 | 7 | 7 | 7 | 8 | 4 | 4 |
| Cyanobacteria Cell Counts(k)/ml | 39.255 | 14.489 | 26.872 | 0.000 | 84.597 | 116.384 | 39.701 | 16.505 | 89.112 | 0.958 | 52.934 |
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