St. Croix Quantitative Data

Summary Data from Quantitative sampling – mussel density, mussel richness and sediment size.

Mussel Density
Mussel Richness
Sediment Size

A map of locations can be found here.
An overview of the methods used to collect these data can be found here.

Summary of Mussel Assemblages Based on Quantitative Sampling 1991-2009

Distribution of Mussels – % found at each site 

Dominant species – shaded blue
2nd most abundant species – shaded green

SpeciesBayportFranconiaInterstateLakelandOsceola PrescottRiversideSeven
Islands
Wild
River
Actinonaias ligamentina0.335.585.840.644.190.4258.1665.9935.74
Alasmidonta marginata0.000.350.590.070.470.100.771.510.38
Amblema plicata63.832.011.0241.842.6429.301.530.500.52
Cyclonaias tuberculata0.001.052.100.140.470.002.041.513.79
Ellipsaria lineolata0.000.352.230.990.160.210.000.000.00
Elliptio dilatata3.064.362.659.121.246.4722.7012.5924.35
Epioblasma triquetra0.003.842.780.001.400.000.510.000.00
Fusconaia ebena0.000.000.000.000.000.830.000.000.00
Fusconaia flava13.336.114.2715.0518.7619.603.830.501.81
Lampsilis cardium0.113.050.890.781.093.021.796.052.45
Lampsilis higginsii0.000.520.021.130.161.250.000.000.00
Lampsilis siliquoidea0.551.130.170.350.001.361.280.503.29
Lasmigona complanata0.000.090.090.070.620.210.000.000.05
Lasmigona compressa0.000.000.040.000.000.000.260.000.02
Lasmigona costata0.000.000.230.000.000.000.513.532.45
Leptodea fragilis0.872.181.801.271.401.040.260.761.22
Ligumia recta0.000.520.250.140.310.522.812.521.19
Megalonaias nervosa0.000.000.000.140.000.000.000.000.00
Obliquaria reflexa7.650.611.9111.941.7117.940.000.000.17
Obovaria olivaria0.001.311.550.000.620.101.020.762.81
Pleurobema sintoxia1.204.713.213.183.269.590.000.761.88
Potamilus alatus0.981.220.870.992.170.420.000.001.12
Potamilus ohiensis0.000.000.000.000.310.000.000.000.00
Pyganodon grandis0.770.170.020.210.160.730.000.250.05
Quadrula fragosa0.000.090.130.000.310.000.000.000.00
Quadrula metanevra0.0014.222.020.423.721.040.000.000.00
Quadrula pustulosa4.372.976.733.755.122.711.531.518.15
Quadrula quadrula0.330.090.020.780.160.100.000.000.00
Strophitus undulatus0.220.350.130.350.930.100.000.501.12
Toxolasma parvus0.330.090.190.140.001.460.510.000.05
Tritogonia verrucosa0.002.362.650.076.980.000.000.000.00
Truncilla donaciformis0.331.223.590.000.930.000.260.000.00
Truncilla truncata1.0937.4351.505.9440.781.040.000.256.89
UNKNOWN ADULT0.220.260.110.070.000.000.260.000.14
UNKNOWN JUVENILE0.111.750.400.210.000.100.000.000.31
Utterbackia imbecillis0.330.000.000.210.000.310.000.000.05
Total number of mussels collected9151146528914156459593923974197
Number of 0.25 m2 quadrats500700820400500500500200700
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