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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .Warmer, more acidic oceans are bad news for tropical coral reefs: the coral becomes stunted and bleached.
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3 .But climate change's oceanic effects could go, literally, much deeper than that, killing off creatures that live four miles down, in permanent darkness.
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4 .So says a study in the journal Global Change Biology.
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5 .Researchers modeled nutrient flow in the oceans under several greenhouse gas emissions scenarios.
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6 .And they found that, by the year 2100, nutrients at the ocean's surface may dwindle, leaving fewer leftovers to float down to organisms below.
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7 .The result could be a massive die-off of life on the seafloor, like sea cucumbers, starfish, urchins and worms.
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8 .Under a severe emissions scenario, the loss of marine life globally would equal the biomass of the entire human race.
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9 .One bright spot in the deep darkness: the exotic tube worms and giant clams that thrive at hydrothermal vents don't need surface nutrients to survive.
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10 .But plenty of other species do, the researchers say, and we don't even know much of what's down there.
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11 .This study makes one thing clear: when it comes to climate change and the oceans, we're already in deep.
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12 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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