美国科学60秒 SSS 2012-10-05

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But some primitive³ marine⁴ plants are breaking the rules. Marine scientists at the University of Rhode Island School of Oceanography recently discovered a species of phytoplankton that actively⁵ avoids being eaten.

 

The scientists observed that the phytoplankton, called Heterosigma akashiwo, swam away from zooplankton, its natural predator¹, yet remained undaunted by the presence of predators with an appetite for other things.

 

What’s more, when the scientists provided an area that the predators couldn’t tolerate, sort of a safe haven⁶ if you will, the phytoplankton took refuge in that location. They also avoided empty water that had previously⁷ contained predators, leading researchers to believe they’re responding to some sort of chemical signal. The discovery is published in the journal PLoS ONE. 

 

It was already known that phytoplankton could move toward light and food, but this is the first time they’ve been known literally⁸ to go out of their way to avoid being a meal themselves.

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