Sampled in 2004 and 2007
![](http://danhornbach.org/wp-content/uploads/2022/11/stcroix-sevenislands1-1024x768.jpg)
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![](http://danhornbach.org/wp-content/uploads/2022/11/stcroix-sevenislands4.png)
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Community Composition – Percent composition each year
Species | 2004 | 2007 |
Actinonaias ligamentina | 65.14 | 68.14 |
Alasmidonta marginata | 1.41 | 1.77 |
Amblema plicata | 0.35 | 0.88 |
Cyclonaias tuberculata | 2.11 | 0.00 |
Elliptio dilatata | 13.03 | 11.50 |
Fusconaia flava | 0.70 | 0.00 |
Lampsilis cardium | 5.99 | 6.19 |
Lampsilis siliquoidea | 0.70 | 0.00 |
Lasmigona costata | 2.46 | 6.19 |
Leptodea fragilis | 0.70 | 0.88 |
Ligumia recta | 3.52 | 0.00 |
Obovaria olivaria | 1.06 | 0.00 |
Pleurobema sintoxia | 0.70 | 0.88 |
Pyganodon grandis | 0.35 | 0.00 |
Quadrula pustulosa | 1.41 | 1.77 |
Strophitus undulatus | 0.35 | 0.88 |
Truncilla truncata | 0.00 | 0.88 |