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Bacteria form ‘electrical cables’ on deep-sea floor

Bioengineer by Bioengineer
October 29, 2013
in NEWS
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The researchers found that the bacteria breaks down substances in deeper sediments and releases life important compounds in the process, suggesting that it might play a crucial role in the deep sea ecosystem.The bacteria, was first discovered in 2010 by Danish scientists in the aftermath of an investigation looking into chemical fluctuations in sediments from the bottom of Aarhus Bay. These fluctuations were too anomalous to be chemical in nature, so the oxygen levels change was attributed to an electrical signal. What could have possible cause an electrical signal spread across tens of miles on the sea floor?

Their answer came in the form of the Desulfobulbus bacterial cells, which are only a few thousandths of a millimeter long each or 100 times thinner than a human hair – so tiny that they are invisible to the naked eye. These bacteria form a multicellular filament that can transmit electrons across a distance as large as 1 centimeter as part of the filament’s respiration and ingestion processes. In just one teaspoon of mud, the researchers found a full half-mile of Desulfobulbaceae cable, while in an undisturbed area, says the team, there are tens of thousands of kilometers of cable bacteria living under a single square meter of seabed. And it’s not just a Danish phenomenon.

Source: Nature

 

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