Oceans' Acidity Has Increased to the Point Where Sea Snails' Shells are Dissolving

#Animals

Sun, May 4th, 2014 11:00 by capnasty NEWS

Due to the increased levels of acidity in the seas caused by carbon emissions, the shell of sea snails is literally dissolving on their bodies as they are born.

This is worrisome, not just because it's kind of horrifying on a micro-level—imagine the air that surrounds you slowly eroding, say, your cartilage—but because these sea snails are a major food source for other important species like salmon, herring, and mackerel. Their disappearance would radically transform the coastal biome.

Acidification primarily effects the snails' outer shell layer, and is especially dangerous to juveniles, which are born with very tiny shells. The outer shell, which is comprised of "a more soluble form, they are just dissolved away. In that sense, shells are getting more thin," Bednarsek said. "It is just a few micron in juveniles. If you dissolve that, the whole shell can just disappear in two months time."

This means they have to use precious energy to try to build shells with less soluble materials, while the absence of a shell restricts mobility and leave them vulnerable to infection. So is this an existential threat to a highly prevalent species?

"Yes, basically," Bednarsek said.

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