| Report Year: 2009 |
| Hickory Grove Lake, Story County |
| Phytoplankton |
| | 6/15/2009 | 7/20/2009 | 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 | 3.690 | 1.645 | 2.668 | 1.875 | 2.328 | 6.449 | 0.463 | 1.485 | 2.393 | 4.721 | 0.062 |
| Chlorophyta | 0.094 | 0.456 | 0.275 | 0.054 | 0.711 | 0.014 | 0.186 | 0.143 | 0.037 | 2.000 | 2.542 |
| Chrysophyta | 0.094 | 8.472 | 4.283 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Cryptophyta | 8.334 | 2.685 | 5.510 | 0.746 | 0.175 | 0.391 | 0.432 | 0.277 | 0.076 | 2.299 | 1.651 |
| Cyanobacteria | 151.998 | 165.362 | 158.680 | 9.294 | 51.759 | 1.204 | 13.746 | 7.653 | 2.971 | 7.807 | 10.549 |
| Dinophyta | 5.276 | 12.834 | 9.055 | 0.000 | 0.515 | 2.389 | 0.097 | 0.559 | 0.214 | 0.533 | 5.908 |
| Euglenophyta | 0.312 | 0.618 | 0.465 | 0.330 | 0.000 | 0.142 | 0.052 | 0.006 | 0.034 | 0.000 | 0.082 |
| Total | 169.797 | 192.073 | 180.935 | 12.299 | 55.488 | 10.589 | 14.976 | 10.123 | 5.726 | 17.360 | 20.795 |
| Taxonomic Richness | 26 | 40 | 33 | 6 | 6 | 12 | 12 | 12 | 13 | 5 | 9 |
| Cyanobacteria Cell Counts(k)/ml | 141.038 | 255.175 | 198.107 | 0.000 | 37.627 | 6.607 | 26.521 | 6.655 | 3.133 | 66.567 | 32.262 |
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