| Report Year: 2009 |
| George Wyth Lake, Black Hawk County |
| Zooplankton |
| | 6/24/2009 | 7/29/2009 | 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 | 312.785 | 79.598 | 196.192 | 1.108 | 1.051 | 0.000 | 12.099 | 41.197 | 17.299 | 0.910 | 0.498 |
| Chydorus | 0.000 | 18.682 | 9.341 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Daphnia | 211.909 | 257.507 | 234.708 | 5.968 | 4.914 | 24.365 | 36.101 | 28.211 | 22.702 | 27.473 | 9.644 |
| Copepoda |
| Calanoida | 22.366 | 51.958 | 37.162 | 18.730 | 48.244 | 20.772 | 206.458 | 64.399 | 24.096 | 26.521 | 10.664 |
| Cyclopoida | 94.752 | 99.244 | 96.998 | 7.800 | 30.668 | 31.728 | 42.436 | 1.721 | 40.611 | 16.474 | 8.369 |
| Nauplii | 11.318 | 20.162 | 15.740 | 7.045 | 11.003 | 6.496 | 19.313 | 33.419 | 14.596 | 7.002 | 1.325 |
| Nauplii |
| Nauplii | 11.318 | 20.162 | 15.740 | 7.045 | 11.003 | 6.496 | 19.313 | 33.419 | 14.596 | 7.002 | 1.325 |
| Rotifera |
| Ascomorpha | 0.000 | 0.033 | 0.017 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Asplanchna | 43.022 | 0.000 | 21.511 | 0.000 | 0.000 | 0.000 | 0.000 | 1.065 | 0.000 | 0.047 | 0.000 |
| Brachionus | 0.000 | 0.000 | 0.000 | 0.003 | 0.022 | 0.000 | 0.359 | 0.313 | 0.025 | 0.000 | 0.000 |
| Conochilus | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.002 | 0.001 | 0.000 | 0.000 | 0.000 |
| Euchlanis | 0.024 | 0.000 | 0.012 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Filinia | 0.000 | 0.096 | 0.048 | 0.007 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Kellicottia | 0.173 | 0.118 | 0.145 | 0.003 | 0.000 | 0.000 | 0.005 | 0.000 | 0.031 | 0.000 | 0.000 |
| Keratella cochlearis | 0.286 | 0.648 | 0.467 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Keratella | 0.000 | 0.000 | 0.000 | 0.054 | 0.201 | 1.446 | 0.659 | 1.661 | 0.401 | 0.251 | 0.029 |
| Lecane | 0.000 | 0.000 | 0.000 | 0.000 | 0.130 | 0.000 | 0.000 | 0.019 | 0.109 | 0.000 | 0.000 |
| Polyarthra | 0.365 | 1.545 | 0.955 | 0.133 | 2.478 | 4.277 | 0.844 | 0.771 | 1.489 | 0.700 | 0.000 |
| Pompholx | 0.000 | 0.000 | 0.000 | 0.070 | 0.019 | 0.313 | 0.940 | 0.034 | 0.000 | 0.000 | 0.000 |
| Trichocerca | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.028 | 0.000 | 0.106 | 0.384 | 0.000 |
| Total | 697.002 | 529.591 | 613.296 | 40.923 | 98.729 | 89.397 | 319.245 | 172.810 | 121.466 | 79.761 | 30.528 |
| Large Suspension Feeders (%) | 30 | 49 | 40 | 15 | 4 | 22 | 16 | 13 | 16 | 34 | 33 |
| Taxonomic Richness | 10 | 11 | 11 | 8 | 7 | 7 | 9 | 9 | 8 | 7 | 6 |
|