| Report Year: 2009 |
| Pleasant Creek Lake, Linn 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 | 0.035 | 0.857 | 0.446 | 0.650 | 2.786 | 0.243 | 0.358 | 0.154 | 0.716 | 0.006 | 18.794 |
| Chlorophyta | 0.075 | 139.835 | 69.955 | 0.215 | 0.298 | 0.650 | 0.113 | 0.390 | 0.317 | 0.575 | 0.373 |
| Chrysophyta | 0.000 | 20.968 | 10.484 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Cryptophyta | 0.503 | 0.409 | 0.456 | 0.163 | 0.086 | 0.449 | 0.171 | 0.049 | 0.142 | 0.024 | 0.540 |
| Cyanobacteria | 10.320 | 42.450 | 26.385 | 52.787 | 30.058 | 13.189 | 40.453 | 5.801 | 13.974 | 1.963 | 8.994 |
| Dinophyta | 0.000 | 16.595 | 8.298 | 0.095 | 0.287 | 0.427 | 0.216 | 0.000 | 0.000 | 0.181 | 0.139 |
| Euglenophyta | 0.041 | 0.064 | 0.052 | 0.000 | 0.000 | 0.231 | 0.019 | 0.005 | 0.015 | 0.000 | 0.216 |
| Total | 10.974 | 221.178 | 116.076 | 53.910 | 33.514 | 15.189 | 41.330 | 6.398 | 15.165 | 2.749 | 29.056 |
| Taxonomic Richness | 24 | 30 | 27 | 7 | 11 | 12 | 11 | 12 | 8 | 7 | 8 |
| Cyanobacteria Cell Counts(k)/ml | 10.628 | 75.976 | 43.302 | 0.000 | 39.603 | 42.987 | 52.847 | 6.334 | 18.071 | 14.781 | 30.452 |
|