| Report Year: 2009 |
| East Okoboji Lake, Dickinson County |
| Zooplankton |
| | 6/3/2009 | 7/8/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Suborder/Genus | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) | Dry Mass (μg/L) |
| Cladocera |
| Bosmina | 0.000 | 0.000 | 0.000 | 0.257 | 0.395 | 1.174 | 0.184 | 0.188 | 0.553 | 0.000 | 0.000 |
| Ceriodaphnia | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 4.044 | 0.000 |
| Daphnia | 49.619 | 163.942 | 106.781 | 31.973 | 14.935 | 31.154 | 209.570 | 143.262 | 60.793 | 39.291 | 22.932 |
| Copepoda |
| Calanoida | 12.019 | 206.420 | 109.220 | 29.673 | 30.922 | 19.482 | 110.572 | 98.722 | 27.551 | 35.471 | 49.919 |
| Cyclopoida | 3.999 | 0.000 | 2.000 | 7.279 | 1.147 | 2.764 | 13.217 | 0.205 | 11.058 | 32.020 | 1.645 |
| Nauplii | 2.689 | 6.712 | 4.700 | 2.609 | 3.065 | 3.673 | 18.018 | 3.818 | 7.140 | 7.070 | 1.575 |
| Nauplii |
| Nauplii | 2.689 | 6.712 | 4.700 | 2.609 | 3.065 | 3.673 | 18.018 | 3.818 | 7.140 | 7.070 | 1.575 |
| Rotifera |
| Asplanchna | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.032 | 0.011 | 0.192 | 0.013 | 0.096 | 0.000 |
| Brachionus | 0.000 | 0.000 | 0.000 | 0.014 | 0.021 | 0.035 | 0.350 | 0.000 | 0.001 | 0.000 | 0.000 |
| Conochilus | 0.000 | 0.000 | 0.000 | 0.013 | 0.000 | 0.000 | 0.000 | 0.007 | 0.000 | 0.000 | 0.000 |
| Filinia | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.031 | 0.000 | 0.000 |
| Keratella | 0.000 | 0.000 | 0.000 | 0.039 | 0.000 | 0.000 | 0.007 | 0.000 | 0.065 | 0.013 | 0.000 |
| Lecane | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.210 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Monostyla | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.815 | 0.000 | 0.000 | 0.000 | 0.000 |
| Polyarthra | 0.000 | 0.033 | 0.017 | 0.000 | 0.000 | 0.000 | 0.054 | 0.000 | 0.000 | 0.047 | 0.000 |
| Trichocerca | 0.000 | 0.000 | 0.000 | 0.000 | 0.014 | 0.000 | 0.000 | 0.000 | 0.000 | 0.083 | 0.000 |
| Total | 68.327 | 377.107 | 222.717 | 71.858 | 50.498 | 58.524 | 352.797 | 246.392 | 107.206 | 118.135 | 76.072 |
| Large Suspension Feeders (%) | 73 | 43 | 58 | 38 | 19 | 44 | 54 | 57 | 56 | 38 | 30 |
| Taxonomic Richness | 4 | 4 | 4 | 7 | 4 | 5 | 6 | 4 | 8 | 7 | 4 |
|