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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
How do baby coral find a new home in the open ocean? They listen—very closely—for reef sounds.
Scientists at the University of Bristol in England had already discovered in the last few years that baby fish who live among coral use sound to find the reefs. So they decided1 to check out the coral larvae2 themselves. These are tiny creatures, the size of a flea3.
The researchers created so-called choice chambers4. When the chambers were silent, the larvae floated about, equally distributed. But when the scientists played sounds of reefs, featuring the murmurs5 of fish and crustaceans6, the larvae swarmed7 toward the speakers.
What's even more interesting: fish larvae have anatomical features for detecting sound. But coral larvae have no such features. So how are they hearing? The researchers hypothesize that the sound waves are intercepted8 by cilia—hairlike structures—on the larvae. The work was published in the journal Public Library of Science ONE.
Here's why this is important. Coral reefs around the world are threatened. Coral larvae could be deterred9 by noise from human sources. So managing noise pollution could be one more angle in the effort to save the reefs.
Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber.
1 decided | |
adj.决定了的,坚决的;明显的,明确的 | |
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2 larvae | |
n.幼虫 | |
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3 flea | |
n.跳蚤 | |
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4 chambers | |
n.房间( chamber的名词复数 );(议会的)议院;卧室;会议厅 | |
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5 murmurs | |
n.低沉、连续而不清的声音( murmur的名词复数 );低语声;怨言;嘀咕 | |
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6 crustaceans | |
n.甲壳纲动物(如蟹、龙虾)( crustacean的名词复数 ) | |
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7 swarmed | |
密集( swarm的过去式和过去分词 ); 云集; 成群地移动; 蜜蜂或其他飞行昆虫成群地飞来飞去 | |
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8 intercepted | |
拦截( intercept的过去式和过去分词 ); 截住; 截击; 拦阻 | |
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9 deterred | |
v.阻止,制止( deter的过去式和过去分词 ) | |
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