The new FOCE experimental chamber being developed by MBARI scientists.

The scientists at the Monterey Bay Aquarium Research Institute (MBARI) are already well-known for uncovering some of the most extreme marine animals in the deep sea, like the incredible vampire squid. But recently, they’re using their unique blend of biology and engineering to study one of the least-discussed impacts of climate change: ocean acidification.

When we hear about climate change, we tend of think of the atmosphere – and for good reason. But as MBARI scientists describe, the oceans are a key part of the process. The ocean acts like a giant sponge, absorbing carbon dioxide emissions from the air. And as we add more and more CO2 to air by burning fossil fuels, the ocean is absorbing it. On one level, it’s done us a big favor. Scientists say that we would be experiencing much more extreme climate change were it not for the ocean’s ability to remove the heat-trapping gas.

However, the carbon dioxide that the ocean absorbs is making the water more acidic. This isn’t the first time that the oceans have become more acidic. But as is the case with many impacts of climate change, it’s the rate at which acidification is happening that worries scientists the most.

As you can probably guess, the ocean is an incredibly complex system. So ocean acidification poses an interesting question to scientists: what will the impacts be on marine species and ecosystems? What they know already is that there will be winners and losers in more acidic waters. Some creatures may do fine, while others won’t be able to adapt in time. Either way, food webs may feel the effects – including webs involving species that humans depend on , like salmon.

Another major concern has to do with marine animals with certain kinds of shells – known as “calcifiers.” Corals, clams and others all use carbonate in the water to build their shells out of calcium carbonate. But ocean acidification reduces the amount of carbonate in the water, making it more difficult for them to make shells. That could be devastating for coral reefs, who are already facing a number of stresses.

Even if you’re an animal without a shell, ocean acidification could make things difficult. Scientists are studying how much stress this could put on animals that can’t regulate their internal pH, or how it could affect the larvae or reproduction of certain species. MBARI scientists are hoping that the flume they are developing to conduct FOCE experiments will help researchers answer some of these questions.

Check out the whole story – watch the “Acidic Seas” audio slide show online.

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Reporter’s Notes: Acidic Seas 23 April,2013

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  • Biology Student

    Nicely explained and presented. I really understand both the affects of the unbalance pH level and the reasons for its distortion.

  • Biology Student 2

    All I can say is, thank goodness for the ocean. Otherwise, we’d be affected by the climate change at a time when we would not be prepared technology-wise to fight it. Keep researching!

  • Interested Students >

    Yes, we agree that carbon dioxide will affect the ecosystem and marine species in both negative and positive ways but primarily in a negative way.

    It’s amazing how connected people are to the food chains in the ocean; we not only caused this problem (too much CO2), but we will be drastically affected by the negatave reaction of species.

    It’s amazing how liitle the general public knows about this… How could the message be spread (to raise awareness)?

  • we are species

    Not only the increase of C02 in the air but also the pollution of ocean itself might also affect species.
    If the food webs are affected, it might be a very serious issue, since the change of marine food webs will change the whole food webs of the Earth.
    People cutting down trees must affect the marine species because trees are the ones who decrease the amount of CO2.
    Does the increase of H2CO2 has a bad effect on the plants in the oceans, too?

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