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段落1

This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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Plants can't choose where their seeds end up.

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Some float on the wind, others on the water.

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Many seeds hitch a ride on, or inside animals.

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And the farther a seed gets from its parent, and any predators or disease the parent might have, the better its chance of survival.

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Or so the theory goes.

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Researchers studied that phenomenon in the South American chili pepper Capsicum chacoense,

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which relies on birds like flycatchers to spread its seed.

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To get realistic samples, researchers plucked chili seeds from the droppings of captive flycatchers.

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Then they scattered them near and far from wild chili bushes in Bolivia.

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Contrary to the prevailing theory, distant seeds fared no better than seeds directly beneath chili plants.

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But it turns out the trip through the birds gave seeds a different competitive edge.

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The passage stripped them of predator-attracting chemicals and pathogenic fungi,

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which quadrupled the seeds' survival rate, compared to their undigested counterparts.

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The results appear in the journal Ecology Letters.

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So even though these chili seeds don't need to go the distance to survive,

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you might say that a seed in the bird is worth about four on the bush.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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