| Report Year: 2009 |
| Diamond Lake, Poweshiek County |
| Phytoplankton |
| | 6/16/2009 | 7/20/2009 | 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 | 0.913 | 3.785 | 2.349 | 0.624 | 3.616 | 7.600 | 0.115 | 0.110 | 1.048 | 3.123 | 0.134 |
| Chlorophyta | 2.754 | 6.744 | 4.749 | 0.243 | 0.776 | 1.787 | 0.514 | 0.290 | 0.417 | 2.962 | 0.948 |
| Cryptophyta | 1.145 | 0.229 | 0.687 | 1.672 | 0.062 | 0.833 | 0.265 | 0.750 | 0.008 | 8.363 | 0.194 |
| Cyanobacteria | 24.773 | 29.916 | 27.345 | 9.318 | 33.166 | 13.593 | 10.208 | 9.701 | 57.636 | 2.788 | 2.988 |
| Dinophyta | 0.000 | 0.000 | 0.000 | 0.488 | 5.803 | 0.622 | 0.435 | 1.848 | 0.000 | 0.906 | 16.061 |
| Euglenophyta | 0.022 | 0.093 | 0.057 | 0.086 | 0.000 | 0.085 | 0.074 | 0.012 | 0.000 | 0.000 | 0.000 |
| Total | 29.608 | 40.768 | 35.188 | 12.431 | 43.424 | 24.519 | 11.612 | 12.711 | 59.109 | 18.142 | 20.324 |
| Taxonomic Richness | 32 | 36 | 34 | 9 | 10 | 17 | 11 | 8 | 6 | 6 | 8 |
| Cyanobacteria Cell Counts(k)/ml | 19.867 | 23.392 | 21.630 | 0.000 | 31.172 | 22.017 | 21.123 | 29.836 | 48.469 | 14.712 | 13.355 |
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