Metal eating bacteria
 

New Bacteria Found on Titanic; Eats Metal

Rachel Kaufman

for National Geographic News

Published December 10, 2010

A new species of bacteria has been discovered on the sunken hull of the
Titanic-and it may be speeding up the decay of the historic wreck, new
research reports. (See Titanic pictures.)

Scientists at Dalhousie University in Halifax, Canada, collected samples of
the R.M.S. Titanic's icicle-like rust formations, called rusticles, in 1991.

Although the formations were teaming with life, nobody had identified the
specific microbes on the ship, instead grouping them into broad categories
such as bacteria or fungi.

So Henrietta Mann and then graduate student Bhavleen Kaur, now of the
Ontario Science Centre, decided to isolate and identify one species of
bacteria from the mess of microscopic life-forms.

The one they chose turned out to be a new species, which the pair dubbed
Halomonas titanicae. The bacteria is part of a family that had never been
seen before in waters as deep as those in which the Titanic sits, about 2.4
miles (3.8 kilometers) below the surface, Kaur said.

Titanic's Destruction "a Learning Process"

The Titanic sank 98 years ago and sat largely undisturbed on the seafloor
until its rediscovery in 1985. Since then researchers have learned that
microorganisms, seafloor currents, and the explorers themselves have been
hastening the destruction of the ship.

(See "Titanic Was Found During Secret Cold War Navy Mission.")

Some experts hope to preserve the wreck by killing the metal-munching
bacteria and shielding the boat from currents, allowing tourists and
documentary filmmakers to visit Titanic for years to come.

But "letting it proceed with its deterioration is also a learning process,"
Kaur said. "If we stop and preserve it, then we stop the process of
degradation."

Ultimately, such deep-dwelling, metal-eating microbes could teach engineers
how to protect offshore oil rigs or dispose of other ships.

Research describing the new bacteria species appears in the December 8 issue
of the International Journal of Systematic and Evolutionary Microbiology.

http://news.nationalgeographic.com/n...wreck-science/