| Report Year: 2009 |
| North Twin Lake, Calhoun County |
| Phytoplankton |
| | 6/4/2009 | 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 | 55.843 | 13.076 | 34.459 | 5.146 | 8.394 | 1.509 | 7.807 | 0.064 | 3.246 | 0.396 | 0.242 |
| Chlorophyta | 13.836 | 0.496 | 7.166 | 1.495 | 3.413 | 0.156 | 0.139 | 5.313 | 0.966 | 4.041 | 1.648 |
| Chrysophyta | 0.845 | 40.872 | 20.859 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.005 | 0.000 | 0.000 |
| Cryptophyta | 2.719 | 0.133 | 1.426 | 0.089 | 0.169 | 0.241 | 0.212 | 0.157 | 0.157 | 0.419 | 0.000 |
| Cyanobacteria | 46.625 | 227.574 | 137.099 | 593.574 | 216.667 | 2007.055 | 181.725 | 2463.810 | 242.554 | 56.577 | 196.351 |
| Dinophyta | 0.000 | 3.397 | 1.699 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 4.006 | 0.533 | 0.000 |
| Euglenophyta | 0.000 | 0.000 | 0.000 | 0.023 | 0.000 | 0.005 | 0.333 | 0.004 | 0.008 | 0.000 | 0.000 |
| Total | 119.868 | 285.548 | 202.708 | 600.327 | 228.642 | 2008.965 | 190.217 | 2469.348 | 250.942 | 61.967 | 198.241 |
| Taxonomic Richness | 24 | 38 | 31 | 8 | 9 | 12 | 7 | 9 | 12 | 6 | 4 |
| Cyanobacteria Cell Counts(k)/ml | 30.258 | 212.090 | 121.174 | 0.000 | 158.938 | 1436.762 | 131.779 | 2588.453 | 173.547 | 270.228 | 389.590 |
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