| Report Year: 2009 |
| Crystal Lake, Hancock 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 | 7.726 | 0.000 | 3.863 | 35.014 | 9.008 | 1.935 | 18.273 | 2.948 | 29.995 | 9.038 | 0.157 |
| Ceriodaphnia | 0.000 | 0.000 | 0.000 | 33.629 | 13.776 | 0.000 | 0.000 | 0.000 | 0.000 | 14.120 | 25.416 |
| Daphnia | 6.105 | 67.674 | 36.890 | 203.900 | 134.576 | 282.087 | 412.499 | 365.380 | 94.027 | 146.846 | 8.667 |
| Copepoda |
| Calanoida | 97.766 | 131.500 | 114.633 | 49.381 | 31.630 | 226.959 | 126.173 | 39.249 | 156.871 | 57.280 | 30.245 |
| Cyclopoida | 5.394 | 34.985 | 20.189 | 32.389 | 32.444 | 38.203 | 16.614 | 13.335 | 54.257 | 27.485 | 3.839 |
| Nauplii | 20.828 | 5.612 | 13.220 | 19.034 | 9.541 | 18.906 | 14.893 | 18.100 | 16.069 | 9.278 | 0.000 |
| Nauplii |
| Nauplii | 20.828 | 5.612 | 13.220 | 19.034 | 9.541 | 18.906 | 14.893 | 18.100 | 16.069 | 9.278 | 0.000 |
| Rotifera |
| Asplanchna | 0.000 | 0.000 | 0.000 | 4.061 | 16.747 | 4.627 | 0.000 | 0.000 | 99.162 | 0.000 | 0.000 |
| Brachionus | 0.000 | 0.075 | 0.038 | 0.048 | 0.033 | 0.000 | 0.000 | 0.143 | 0.052 | 0.597 | 0.000 |
| Conochilus | 0.000 | 0.000 | 0.000 | 0.000 | 0.019 | 0.000 | 0.000 | 0.000 | 0.017 | 0.000 | 0.000 |
| Filinia | 0.000 | 0.064 | 0.032 | 0.375 | 0.000 | 0.000 | 0.000 | 0.000 | 0.606 | 0.000 | 0.000 |
| Keratella cochlearis | 0.000 | 0.006 | 0.003 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Keratella quadrata | 4.067 | 0.000 | 2.034 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Keratella | 0.000 | 0.000 | 0.000 | 1.690 | 5.840 | 3.262 | 3.764 | 1.644 | 1.106 | 0.124 | 0.081 |
| Lecane | 0.000 | 0.000 | 0.000 | 0.000 | 0.046 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Polyarthra | 0.000 | 0.000 | 0.000 | 0.094 | 0.011 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Pompholx | 0.000 | 0.000 | 0.000 | 0.036 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Trichocerca | 0.000 | 0.000 | 0.000 | 2.207 | 0.312 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Total | 141.886 | 239.916 | 190.901 | 381.858 | 253.985 | 575.978 | 592.215 | 440.797 | 452.163 | 264.767 | 68.404 |
| Large Suspension Feeders (%) | 4 | 28 | 16 | 59 | 40 | 43 | 52 | 64 | 23 | 51 | 70 |
| Taxonomic Richness | 6 | 7 | 7 | 11 | 7 | 6 | 5 | 6 | 8 | 8 | 4 |
|