| Report Year: 2009 |
| Lake Meyer, Winneshiek 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 | 0.094 | 0.692 | 0.393 | 0.000 | 0.000 | 0.043 | 0.278 | 0.007 | 2.580 | 11.427 | 0.482 |
| Chlorophyta | 0.000 | 102.297 | 51.148 | 0.000 | 0.000 | 0.040 | 0.347 | 0.012 | 0.045 | 0.181 | 0.005 |
| Chrysophyta | 0.000 | 15.601 | 7.800 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.081 | 0.000 | 0.000 |
| Cryptophyta | 1.320 | 1.216 | 1.268 | 0.000 | 0.000 | 0.350 | 0.061 | 0.222 | 0.064 | 1.110 | 1.623 |
| Cyanobacteria | 71.544 | 86.410 | 78.977 | 0.000 | 0.000 | 35.441 | 15.825 | 61.322 | 11.484 | 8.488 | 10.674 |
| Dinophyta | 38.674 | 0.000 | 19.337 | 0.000 | 0.000 | 0.000 | 0.098 | 1.727 | 1.112 | 1.389 | 1.096 |
| Euglenophyta | 0.534 | 0.009 | 0.272 | 0.000 | 0.000 | 0.051 | 0.013 | 0.010 | 0.000 | 0.061 | 0.082 |
| Total | 112.167 | 206.224 | 159.195 | 0.000 | 0.000 | 35.926 | 16.621 | 63.299 | 15.367 | 22.655 | 13.963 |
| Taxonomic Richness | 16 | 26 | 21 | 0 | 0 | 6 | 8 | 5 | 6 | 7 | 6 |
| Cyanobacteria Cell Counts(k)/ml | 389.903 | 350.740 | 370.321 | 0.000 | 0.000 | 197.387 | 22.422 | 169.960 | 20.435 | 49.440 | 50.167 |
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