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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
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2 .Crop rotation is a recognized way to keep soil and the food ecosystem healthy.
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3 .Now, scientists are saying that rotation could be a useful tool, in the sea.
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4 .Researchers tracked a shallow-water, near-shore species used for food: sea cucumbers.
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5 .They're easy to harvest and are fairly valuable.
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6 .But those same attributes mean they're easy to overharvest.
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7 .The practice has put some sea cucumber species at high risk of extinction, even in a relatively well-managed area, the Great Barrier Marine Park in Australia.
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8 .In 2004 authorities split the Great Barrier Reef into 154 zones, where each zone was fished only once every three years.
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9 .Fishers rotate through the region.
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10 .In computer models, the researchers ran through dozens of simulations of each zone, both before and after the divisions took place.
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11 .The trials revealed that even with an identical and low-catch allowance in all cases, the sea cucumbers would recover more fully under the rotation strategy than by harvesting simultaneously throughout the region.
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12 .In fact, in trials that included rotations, the yield actually increased.
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13 .The research is in the Proceedings of the National Academy of Sciences.
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14 .The scientists say their results suggest that such rotation might be beneficial in these kinds of shallow marine regions around the world, particularly for species that are in high demand.
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15 .Because you should not eat your seed corn. Or your seed sea cucumbers.
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16 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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