Carbon dioxide emissions affect the oceans as well as the atmosphere. Increasing the amount of carbon dioxide absorbed by the oceans, combined with the warming of the water, will limit the amount of oxygen available at the surface and cause oxygen-poor areas in the deep water to expand. This lack of oxygen will affect larger sea creatures, such as squid. According to a new study, researchers found that under conditions of increased CO2, squid’s metabolic and activity rates slowed significantly. In the future, without sufficient oxygen, the squid would change their hunting and migratory patterns, which could potentially disrupt marine food chains.