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Shell Calcification And Growth Of The Aquatic Snail Planorbella Trivolvis Under Low Calcium Conditions Typical Of Decalcified Northern Lakes, Shawn A. Witte
Shell Calcification And Growth Of The Aquatic Snail Planorbella Trivolvis Under Low Calcium Conditions Typical Of Decalcified Northern Lakes, Shawn A. Witte
Biology Theses
The water calcium concentration of northern softwater lakes has declined to critically low levels due to numerous anthropogenic stressors, and the availability of calcium is expected to decline further. To assess the impact that critically low water calcium has on aquatic snail shell calcification and growth, juvenile Planorbella trivolvis were raised for 60 days in one of four treatments, each containing a different amount of dissolved calcium (0.64, 1.3, 2.5, and 5.1 mg/L). There was no difference in tissue weight or shell size among treatments, suggesting low water calcium concentrations do not impact adult body mass or size. However, snails …