| Report Year: 2009 |
| Coralville Reservoir, Johnson County |
| Zooplankton |
| | 6/22/2009 | 7/27/2009 | 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 | 5.378 | 71.147 | 38.262 | 0.000 | 0.000 | 0.000 | 1.159 | 0.935 | 0.000 | 0.217 | 0.031 |
| Ceriodaphnia | 0.000 | 32.709 | 16.354 | 1.291 | 0.000 | 0.512 | 0.000 | 0.000 | 0.000 | 0.000 | 2.787 |
| Chydorus | 0.000 | 0.395 | 0.198 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Daphnia | 0.614 | 14.925 | 7.769 | 1.349 | 1.815 | 4.396 | 5.805 | 6.504 | 4.108 | 1.351 | 0.739 |
| Copepoda |
| Calanoida | 0.000 | 0.000 | 0.000 | 0.549 | 0.405 | 0.303 | 2.313 | 8.331 | 0.000 | 5.448 | 0.157 |
| Cyclopoida | 0.466 | 19.559 | 10.012 | 2.875 | 0.465 | 9.016 | 6.643 | 29.120 | 3.734 | 2.785 | 2.837 |
| Nauplii | 1.413 | 6.515 | 3.964 | 0.904 | 0.584 | 3.634 | 1.934 | 6.008 | 8.742 | 4.761 | 0.575 |
| Nauplii |
| Nauplii | 1.413 | 6.515 | 3.964 | 0.904 | 0.584 | 3.634 | 1.934 | 6.008 | 8.742 | 4.761 | 0.575 |
| Rotifera |
| Asplanchna | 0.589 | 0.000 | 0.294 | 0.141 | 0.000 | 0.225 | 0.613 | 2.746 | 0.759 | 0.196 | 0.000 |
| Brachionus | 0.193 | 0.292 | 0.242 | 0.340 | 2.522 | 0.425 | 2.737 | 4.359 | 6.485 | 0.267 | 0.025 |
| Conochilus | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.002 | 0.000 | 0.000 | 0.000 | 0.000 |
| Filinia | 0.000 | 0.873 | 0.437 | 0.012 | 0.000 | 0.008 | 0.000 | 0.012 | 0.259 | 0.000 | 0.000 |
| Hexarthra | 0.000 | 0.000 | 0.000 | 0.000 | 0.009 | 0.000 | 0.000 | 0.075 | 2.971 | 0.000 | 0.000 |
| Keratella cochlearis | 0.077 | 0.414 | 0.245 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Keratella | 0.000 | 0.000 | 0.000 | 0.022 | 0.011 | 0.028 | 0.038 | 0.469 | 0.201 | 0.048 | 0.044 |
| Polyarthra | 0.665 | 0.000 | 0.333 | 0.311 | 0.171 | 0.311 | 0.168 | 0.757 | 9.985 | 0.147 | 0.022 |
| Trichocerca | 0.000 | 0.000 | 0.000 | 0.011 | 0.008 | 0.005 | 0.000 | 0.022 | 0.123 | 0.000 | 0.000 |
| Total | 9.394 | 146.829 | 78.111 | 7.805 | 5.990 | 18.863 | 21.413 | 59.337 | 37.368 | 15.220 | 7.217 |
| Large Suspension Feeders (%) | 7 | 32 | 19 | 30 | 22 | 30 | 31 | 11 | 8 | 7 | 50 |
| Taxonomic Richness | 8 | 9 | 9 | 7 | 5 | 8 | 8 | 8 | 8 | 6 | 7 |
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