| Report Year: 2009 |
| Mill Creek Lake, O'Brien County |
| Zooplankton |
| | 6/2/2009 | 7/6/2009 | 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 | 378.320 | 31.389 | 204.854 | 0.000 | 2.355 | 23.873 | 134.417 | 150.787 | 51.248 | 43.266 | 0.415 |
| Ceriodaphnia | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 4.381 | 41.056 | 4.145 | 22.618 | 0.000 | 0.000 |
| Chydorus | 0.000 | 3.277 | 1.639 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Daphnia | 9.347 | 15.738 | 12.543 | 0.000 | 26.113 | 21.655 | 109.970 | 87.868 | 33.400 | 119.462 | 8.933 |
| Copepoda |
| Calanoida | 0.000 | 0.000 | 0.000 | 0.000 | 25.469 | 44.877 | 92.561 | 276.078 | 79.805 | 115.363 | 8.104 |
| Cyclopoida | 63.300 | 136.316 | 99.808 | 0.000 | 21.560 | 40.271 | 142.854 | 20.092 | 45.224 | 59.235 | 12.636 |
| Nauplii | 14.689 | 29.701 | 22.195 | 0.000 | 17.244 | 11.050 | 34.710 | 59.929 | 14.590 | 18.215 | 2.393 |
| Nauplii |
| Nauplii | 14.689 | 29.701 | 22.195 | 0.000 | 17.244 | 11.050 | 34.710 | 59.929 | 14.590 | 18.215 | 2.393 |
| Rotifera |
| Asplanchna | 0.000 | 0.000 | 0.000 | 0.000 | 1.341 | 13.415 | 5.070 | 3.076 | 0.000 | 19.758 | 0.000 |
| Brachionus | 0.000 | 0.470 | 0.235 | 0.000 | 0.000 | 0.673 | 0.753 | 0.000 | 0.579 | 0.051 | 0.006 |
| Conochilus | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.001 | 0.001 | 0.004 | 0.000 | 0.000 |
| Hexarthra | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.008 |
| Keratella cochlearis | 0.071 | 1.375 | 0.723 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Keratella quadrata | 0.248 | 0.000 | 0.124 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Keratella | 0.000 | 0.000 | 0.000 | 0.000 | 0.606 | 0.149 | 1.670 | 5.311 | 0.798 | 3.137 | 0.018 |
| Lecane | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.017 | 0.000 |
| Polyarthra | 0.557 | 0.362 | 0.460 | 0.000 | 0.000 | 0.523 | 7.430 | 36.596 | 0.980 | 1.046 | 0.000 |
| Pompholx | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.376 | 9.944 | 10.689 | 0.000 | 0.000 | 0.000 |
| Trichocerca | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.048 | 0.304 | 0.000 | 0.112 | 0.046 | 0.000 |
| Total | 466.531 | 218.629 | 342.580 | 0.000 | 94.688 | 161.288 | 580.740 | 654.572 | 249.358 | 379.594 | 32.512 |
| Large Suspension Feeders (%) | 2 | 7 | 5 | - | 28 | 16 | 29 | 14 | 20 | 25 | 24 |
| Taxonomic Richness | 7 | 8 | 8 | - | 8 | 9 | 11 | 9 | 9 | 9 | 6 |
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