'Coinage' of plankton -- viruses

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"We are beginning to get a picture of gene diversity and gene flow in the most abundant photosynthetic cell on the planet, the Prochlorococcus group of planktonic microbes," said Chisholm.

The photosynthesizing bacteria "form an important part of the food chain in the oceans, supply some of the oxygen we breathe, and even play a role in modulating climate," said Chisholm.

"It's very important that we understand what regulates their populations," she said. "And now genetic diversity seems to be an important factor."
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