| Ocean Acid Corrodes Shelled Marine Life |
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| Written by Kiki Hubbard | |
| Monday, 01 December 2008 | |
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As more carbon dioxide enters the atmosphere, our oceans become increasingly acidic -- and faster than previously thought. Scientists have been monitoring the acidity of seawater around an island off Washington state since 2000. The acidity, they report, has increased ten times faster than climate models predicted. The increase in carbon dioxide emissions from human activities has led to a 30% rise in ocean acidity over the last 200 years. Of course, at stake are entire ecosystems, and the fishing and tourism industries that depend on them. Here's how it works: Atmospheric carbon dioxide dissovles in the oceans and forms carbonic acid. As the water acidity increases, the calcium carbonate shells and skeletons of many marine species corrode. So mussels and other shellfish start to decline in numbers, throwing off the balance of competing and non-competiting species alike. Some species, including smaller barnacles and calcium-based seaweeds, actually fare better under the different conditions. This is the first data on ocean acidity from temperate waters, and more research is needed in both temperate and tropical waters, researchers say. But the study is typical of other climate change research, says one marine biologist, who laments, "almost without exception things are turning out to be worse than we originally thought." Source: National Geographic
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It's true what our moms said...we are what we eat. In fact, it's truer than they thought. What I eat doesn't just affect me anymore, it affects all of us.
Unfortunately, the story of food can sometimes be complicated. But envirovores help each other out...which is why this blog will be bringing you news, tips, and information about food and the environment every step of the way.
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