| Report Year: 2009 |
| Casey Lake (Hickory Hills Lake), Tama County |
| Phytoplankton |
| | 6/23/2009 | 7/28/2009 | 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 | 0.317 | 0.152 | 0.234 | 0.000 | 0.000 | 4.298 | 1.416 | 0.009 | 1.126 | 0.028 | 0.007 |
| Chlorophyta | 0.000 | 1450.033 | 725.017 | 0.000 | 0.000 | 0.788 | 0.081 | 0.041 | 0.011 | 0.016 | 0.007 |
| Cryptophyta | 0.225 | 0.401 | 0.313 | 0.000 | 0.000 | 0.572 | 0.162 | 0.027 | 0.450 | 0.114 | 0.414 |
| Cyanobacteria | 28.824 | 8.329 | 18.576 | 0.000 | 0.000 | 117.717 | 13.986 | 322.489 | 51.656 | 23.890 | 29.778 |
| Dinophyta | 34.190 | 6.630 | 20.410 | 0.000 | 0.000 | 0.000 | 0.261 | 0.471 | 13.628 | 2.866 | 0.132 |
| Euglenophyta | 1.091 | 0.000 | 0.546 | 0.000 | 0.000 | 0.767 | 0.000 | 0.014 | 0.249 | 0.000 | 0.005 |
| Total | 64.647 | 1465.545 | 765.096 | 0.000 | 0.000 | 124.142 | 15.906 | 323.050 | 67.119 | 26.914 | 30.342 |
| Taxonomic Richness | 18 | 18 | 18 | 0 | 0 | 10 | 5 | 8 | 10 | 5 | 5 |
| Cyanobacteria Cell Counts(k)/ml | 129.849 | 34.027 | 81.938 | 0.000 | 0.000 | 656.119 | 43.680 | 242.816 | 59.936 | 30.478 | 165.334 |
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