| Report Year: 2009 |
| Lake Manawa, Pottawattamie County |
| Phytoplankton |
| | 6/9/2009 | 7/14/2009 | 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 | 9.326 | 2.187 | 5.756 | 1.349 | 1.058 | 4.414 | 0.307 | 0.040 | 0.605 | 10.189 | 0.114 |
| Chlorophyta | 0.663 | 0.310 | 0.487 | 1.154 | 0.662 | 2.375 | 0.280 | 0.237 | 0.451 | 4.193 | 8.661 |
| Chrysophyta | 0.978 | 0.000 | 0.489 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Cryptophyta | 0.576 | 0.143 | 0.360 | 0.207 | 0.112 | 0.436 | 0.170 | 0.043 | 0.080 | 0.254 | 0.266 |
| Cyanobacteria | 93.381 | 133.489 | 113.435 | 38.072 | 198.205 | 402.573 | 175.497 | 161.802 | 333.115 | 9.655 | 17.792 |
| Dinophyta | 4.463 | 1.916 | 3.190 | 0.195 | 0.205 | 0.023 | 0.000 | 0.000 | 0.062 | 1.692 | 0.000 |
| Euglenophyta | 2.457 | 0.024 | 1.241 | 0.561 | 0.000 | 0.322 | 1.088 | 0.048 | 0.022 | 0.000 | 0.007 |
| Total | 111.845 | 138.070 | 124.958 | 41.538 | 200.242 | 410.143 | 177.342 | 162.169 | 334.335 | 25.984 | 26.839 |
| Taxonomic Richness | 40 | 32 | 36 | 11 | 11 | 16 | 10 | 12 | 12 | 10 | 8 |
| Cyanobacteria Cell Counts(k)/ml | 67.353 | 98.337 | 82.845 | 0.000 | 150.877 | 634.407 | 174.617 | 147.259 | 240.635 | 40.717 | 56.894 |
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