Why do populations of the volcano snail at the Solitaire vent field exhibit white sclerites?
Answer
They lack iron mineralization due to environmental availability
The variation in color between populations is directly linked to the chemical composition of their surroundings. Sclerites require iron sulfide for their characteristic dark, metallic coloration. When iron is scarce, as is the case in the Solitaire vent field, the snails do not incorporate the mineral into their scales, resulting in a white, non-mineralized appearance, illustrating the role of local chemistry in physical development.
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