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A war without end -- with Earth's carbon cycle held in the balance
Date:2/13/2013

abundance even though it's constantly being killed by the new viruses that have been discovered.

The discovery of the Pelagiphage viral families was made by Yanlin Zhao, Michael Schwalbach and Ben Temperton, postdoctoral researchers working with Giovannoni. They used traditional research methods, growing cells and viruses from nature in a laboratory, instead of sequencing DNA from nature. The new viruses were so unique that computers could not recognize the virus DNA.

"The viruses themselves, of course, appear to be just as abundant as SAR11," Giovannoni said. "Our colleagues at the University of Arizona demonstrated this with new technologies they developed for measuring viral diversity."

SAR11 has several unique characteristics, including the smallest known genetic structure of any independent cell. Through sheer numbers, this microbe has a huge role in consuming organic carbon, which it uses to generate energy while producing carbon dioxide and water in the process. SAR11 recycles organic matter, providing the nutrients needed by algae to produce about half of the oxygen that enters Earth's atmosphere every day.

This carbon cycle ultimately affects all plant and animal life on Earth.


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Contact: Stephen Giovannoni
steve.giovannoni@oregonstate.edu
541-737-1835
Oregon State University
Source:Eurekalert

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