| Report Year: 2009 |
| Cold Springs Lake, Cass County |
| Zooplankton |
| | 6/9/2009 | 7/14/2009 | 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 | 108.044 | 248.968 | 178.506 | 0.000 | 0.000 | 63.551 | 254.453 | 9.002 | 16.963 | 34.010 | 11.845 |
| Ceriodaphnia | 0.000 | 290.210 | 145.105 | 0.000 | 0.000 | 161.107 | 73.826 | 62.296 | 168.930 | 31.636 | 0.000 |
| Chydorus | 0.000 | 1.575 | 0.787 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Daphnia | 2.793 | 58.079 | 30.436 | 0.000 | 0.000 | 9.734 | 164.537 | 41.257 | 106.187 | 16.407 | 20.475 |
| Copepoda |
| Calanoida | 23.161 | 21.523 | 22.342 | 0.000 | 0.000 | 35.256 | 93.884 | 106.113 | 16.706 | 2.075 | 6.077 |
| Cyclopoida | 1.895 | 90.641 | 46.268 | 0.000 | 0.000 | 17.928 | 136.828 | 16.032 | 36.892 | 8.887 | 8.047 |
| Nauplii | 6.553 | 33.478 | 20.015 | 0.000 | 0.000 | 12.083 | 72.530 | 18.219 | 12.322 | 7.474 | 1.265 |
| Nauplii |
| Nauplii | 6.553 | 33.478 | 20.015 | 0.000 | 0.000 | 12.083 | 72.530 | 18.219 | 12.322 | 7.474 | 1.265 |
| Rotifera |
| Asplanchna | 0.000 | 83.368 | 41.684 | 0.000 | 0.000 | 4.617 | 12.056 | 1.276 | 0.000 | 0.502 | 0.000 |
| Brachionus | 0.000 | 0.297 | 0.149 | 0.000 | 0.000 | 2.468 | 6.356 | 0.727 | 5.061 | 0.000 | 0.000 |
| Conochilus | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.234 | 0.154 | 0.000 | 0.000 | 0.000 |
| Filinia | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.149 | 5.907 | 0.000 | 0.000 |
| Hexarthra | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.091 | 0.000 |
| Keratella cochlearis | 0.070 | 0.049 | 0.059 | 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 | 0.000 | 1.771 | 3.139 | 1.728 | 4.052 | 0.112 | 0.018 |
| Monostyla | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.015 | 0.000 |
| Polyarthra | 0.508 | 0.622 | 0.565 | 0.000 | 0.000 | 0.755 | 0.688 | 6.221 | 0.000 | 0.000 | 0.000 |
| Trichocerca | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.643 | 1.654 | 0.700 | 0.971 | 0.000 |
| Total | 143.022 | 828.811 | 485.917 | 0.000 | 0.000 | 309.270 | 819.174 | 264.826 | 373.720 | 102.179 | 47.728 |
| Large Suspension Feeders (%) | 2 | 42 | 22 | - | - | 55 | 30 | 37 | 67 | 47 | 43 |
| Taxonomic Richness | 7 | 11 | 9 | - | - | 9 | 10 | 9 | 7 | 8 | 6 |
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