| Report Year: 2009 |
| Big Spirit Lake, Dickinson County |
| Zooplankton |
| | 6/3/2009 | 7/7/2009 | 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 | 0.171 | 27.261 | 1.115 | 1.202 | 4.697 | 0.104 | 0.000 | 0.000 |
| Daphnia | 14.062 | 10.275 | 12.168 | 46.767 | 280.451 | 68.996 | 110.560 | 57.344 | 81.242 | 12.313 | 2.193 |
| Copepoda |
| Calanoida | 17.820 | 38.164 | 27.992 | 15.012 | 519.297 | 33.405 | 66.717 | 138.853 | 83.287 | 30.494 | 14.384 |
| Cyclopoida | 0.000 | 12.361 | 6.181 | 12.855 | 65.319 | 3.606 | 1.899 | 20.631 | 13.651 | 7.747 | 1.498 |
| Nauplii | 2.737 | 1.730 | 2.234 | 12.468 | 153.838 | 6.461 | 5.079 | 14.479 | 8.324 | 4.648 | 0.189 |
| Nauplii |
| Nauplii | 2.737 | 1.730 | 2.234 | 12.468 | 153.838 | 6.461 | 5.079 | 14.479 | 8.324 | 4.648 | 0.189 |
| Rotifera |
| Asplanchna | 0.000 | 0.000 | 0.000 | 0.001 | 0.001 | 0.331 | 0.027 | 0.000 | 0.000 | 0.000 | 0.000 |
| Brachionus | 0.000 | 0.000 | 0.000 | 0.008 | 0.000 | 0.002 | 0.000 | 0.000 | 0.014 | 0.010 | 0.000 |
| Conochilus | 0.000 | 0.000 | 0.000 | 2.868 | 0.000 | 0.000 | 0.002 | 0.002 | 0.000 | 0.000 | 0.000 |
| Filinia | 0.000 | 0.096 | 0.048 | 0.000 | 0.000 | 0.000 | 0.000 | 0.083 | 0.028 | 0.001 | 0.000 |
| Keratella cochlearis | 0.000 | 0.041 | 0.020 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Keratella | 0.000 | 0.000 | 0.000 | 0.002 | 0.022 | 0.039 | 0.033 | 1.455 | 0.924 | 0.046 | 0.003 |
| Lecane | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.011 | 0.000 | 0.160 | 0.003 | 0.000 | 0.000 |
| Polyarthra | 0.000 | 0.793 | 0.397 | 0.000 | 0.000 | 0.002 | 0.000 | 0.168 | 0.034 | 0.000 | 0.000 |
| Pompholx | 0.000 | 0.000 | 0.000 | 0.000 | 0.030 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Trichocerca | 0.000 | 0.000 | 0.000 | 0.000 | 0.020 | 0.000 | 0.000 | 0.033 | 0.000 | 0.000 | 0.000 |
| Total | 34.619 | 63.460 | 49.040 | 90.154 | 1046.239 | 113.968 | 185.519 | 237.906 | 187.612 | 55.259 | 18.266 |
| Large Suspension Feeders (%) | 41 | 16 | 28 | 46 | 27 | 50 | 59 | 16 | 36 | 25 | 11 |
| Taxonomic Richness | 3 | 7 | 5 | 6 | 7 | 7 | 6 | 8 | 7 | 5 | 4 |
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