| Report Year: 2009 |
| Coralville Reservoir, Johnson County |
| Phytoplankton |
| | 6/22/2009 | 7/27/2009 | 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 | 0.782 | 1.652 | 1.217 | 0.577 | 1.454 | 0.995 | 0.362 | 0.315 | 1.307 | 0.973 | 0.588 |
| Chlorophyta | 0.008 | 0.084 | 0.046 | 0.086 | 0.169 | 0.059 | 0.149 | 0.027 | 0.137 | 0.353 | 0.754 |
| Chrysophyta | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.064 | 0.000 | 0.000 |
| Cryptophyta | 0.717 | 0.206 | 0.462 | 0.615 | 0.189 | 0.194 | 0.060 | 0.029 | 0.101 | 0.057 | 0.036 |
| Cyanobacteria | 475.360 | 1300.438 | 887.899 | 12.074 | 244.069 | 13.502 | 88.219 | 141.872 | 148.711 | 0.117 | 0.082 |
| Dinophyta | 2.431 | 4.207 | 3.319 | 0.000 | 0.000 | 0.070 | 0.000 | 0.026 | 0.000 | 0.107 | 0.016 |
| Euglenophyta | 0.000 | 0.291 | 0.145 | 0.173 | 0.146 | 0.023 | 0.036 | 0.261 | 0.022 | 0.098 | 0.041 |
| Total | 479.298 | 1306.877 | 893.087 | 13.524 | 246.027 | 14.844 | 88.825 | 142.530 | 150.342 | 1.705 | 1.516 |
| Taxonomic Richness | 22 | 20 | 21 | 7 | 11 | 10 | 11 | 11 | 10 | 10 | 10 |
| Cyanobacteria Cell Counts(k)/ml | 340.319 | 929.958 | 635.138 | 0.000 | 175.566 | 10.649 | 63.347 | 102.016 | 106.498 | 0.690 | 0.316 |
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