Question

Imagine that you are at the beach. You can observe sea urchins, clams, seaweed, and fish in the ocean. Which organisms will be more affected by the increasing acidity of the ocean?(1 point)

seaweed

clams

fish

sea urchins

Answer 1

Clams and sea urchins — both build shells/skeletons from calcium carbonate, which dissolves or is harder to form as ocean acidity increases. Fish are less directly affected and seaweed may even benefit from higher CO2.