| Report Year: 2009 |
| Mill Creek Lake, O'Brien County |
| Phytoplankton |
| | 6/2/2009 | 7/6/2009 | 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 | 1.768 | 1.716 | 1.742 | 0.000 | 34.406 | 4.931 | 3.577 | 2.618 | 2.252 | 1.337 | 0.184 |
| Chlorophyta | 0.250 | 5.470 | 2.860 | 0.000 | 0.258 | 2.270 | 0.323 | 0.320 | 9.694 | 1.218 | 0.485 |
| Chrysophyta | 0.000 | 0.200 | 0.100 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 1.248 | 0.000 | 0.000 |
| Cryptophyta | 2.814 | 3.039 | 2.927 | 0.000 | 0.000 | 0.390 | 0.176 | 0.054 | 0.010 | 0.003 | 0.361 |
| Cyanobacteria | 26.676 | 23.007 | 24.842 | 0.000 | 5.962 | 21.685 | 25.945 | 12.435 | 51.252 | 1.064 | 165.424 |
| Dinophyta | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.086 | 0.465 | 1.290 | 0.688 | 2.158 |
| Euglenophyta | 1.386 | 0.000 | 0.693 | 0.000 | 0.000 | 0.117 | 0.032 | 0.006 | 0.001 | 0.000 | 0.009 |
| Total | 32.895 | 33.433 | 33.164 | 0.000 | 40.626 | 29.393 | 30.139 | 15.898 | 65.747 | 4.310 | 168.621 |
| Taxonomic Richness | 20 | 32 | 26 | 0 | 16 | 12 | 14 | 14 | 12 | 8 | 7 |
| Cyanobacteria Cell Counts(k)/ml | 19.071 | 16.504 | 17.787 | 0.000 | 5.009 | 46.942 | 20.820 | 12.260 | 118.626 | 4.928 | 80.181 |
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