| Report Year: 2009 |
| George Wyth Lake, Black Hawk County |
| Phytoplankton |
| | 6/24/2009 | 7/29/2009 | 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 | 2.027 | 0.898 | 1.462 | 0.000 | 0.587 | 0.489 | 0.434 | 3.792 | 7.401 | 4.506 | 0.030 |
| Chlorophyta | 0.082 | 0.088 | 0.085 | 0.175 | 0.549 | 1.014 | 0.804 | 1.491 | 0.031 | 3.004 | 3.843 |
| Chrysophyta | 0.000 | 39.647 | 19.823 | 0.000 | 0.000 | 0.000 | 0.000 | 0.188 | 0.000 | 0.000 | 0.000 |
| Cryptophyta | 0.797 | 1.013 | 0.905 | 0.039 | 0.561 | 0.502 | 0.188 | 0.250 | 0.105 | 0.081 | 0.232 |
| Cyanobacteria | 53.782 | 139.732 | 96.757 | 57.745 | 32.676 | 19.891 | 26.190 | 17.795 | 28.295 | 4.456 | 19.460 |
| Dinophyta | 2.248 | 0.000 | 1.124 | 0.037 | 0.000 | 0.932 | 0.667 | 0.142 | 0.394 | 1.853 | 1.394 |
| Euglenophyta | 0.000 | 1.314 | 0.657 | 0.171 | 0.048 | 0.309 | 0.006 | 0.011 | 0.000 | 0.000 | 0.094 |
| Total | 58.934 | 182.692 | 120.813 | 58.168 | 34.421 | 23.137 | 28.288 | 23.669 | 36.225 | 13.900 | 25.052 |
| Taxonomic Richness | 28 | 22 | 25 | 7 | 12 | 18 | 15 | 12 | 6 | 9 | 8 |
| Cyanobacteria Cell Counts(k)/ml | 264.160 | 609.887 | 437.024 | 0.000 | 57.561 | 106.450 | 19.553 | 19.716 | 110.595 | 8.997 | 63.567 |
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