| Report Year: 2009 |
| Meyers Lake, Black Hawk County |
| Phytoplankton |
| | 6/23/2009 | 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 | 5.557 | 1.083 | 3.320 | 0.000 | 0.000 | 0.926 | 2.335 | 0.207 | 1.020 | 0.824 | 0.187 |
| Chlorophyta | 0.714 | 0.035 | 0.374 | 0.000 | 0.000 | 0.493 | 0.659 | 0.319 | 3.377 | 0.436 | 0.724 |
| Cryptophyta | 0.852 | 0.553 | 0.703 | 0.000 | 0.000 | 3.028 | 1.800 | 0.543 | 0.012 | 0.039 | 0.296 |
| Cyanobacteria | 58.380 | 211.898 | 135.139 | 0.000 | 0.000 | 29.618 | 48.670 | 23.496 | 28.669 | 3.927 | 26.803 |
| Dinophyta | 0.000 | 58.744 | 29.372 | 0.000 | 0.000 | 0.286 | 0.081 | 2.577 | 0.000 | 0.000 | 1.585 |
| Euglenophyta | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 1.156 | 0.040 | 0.012 | 0.000 | 0.021 | 0.000 |
| Total | 65.503 | 272.314 | 168.908 | 0.000 | 0.000 | 35.506 | 53.584 | 27.155 | 33.077 | 5.247 | 29.595 |
| Taxonomic Richness | 26 | 18 | 22 | 0 | 0 | 14 | 11 | 8 | 6 | 7 | 6 |
| Cyanobacteria Cell Counts(k)/ml | 353.256 | 1125.243 | 739.249 | 0.000 | 0.000 | 163.013 | 44.884 | 135.913 | 25.088 | 9.191 | 49.627 |
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