New species of rust-eating bacteria destroying the Titanic

On 07/12/2010
In Famous Wrecks
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From Our Amazing Planet

Rusticles, formations of rust similar to icicles, are speeding up the deterioration of the famous shipwreck.

Researchers at Dalhousie University in Halifax, Nova Scotia, in Canada have been examining the bacteria eating away at the remains of the famous ship as it sits on the ocean floor.

Using DNA technology, Dalhousie scientists Henrietta Mann and Bhavleen Kaur and researchers from the University of Sevilla in Spain were able to identify a new bacterial species collected from rusticles (a formation of rust similar to an icicle or stalactite) from the Titanic wreck. The iron-oxide-munching bacterium has fittingly been named Halomonas titanicae.

The bacteria have critical implications for the preservation of the ship's wreckage.

"In 1995, I was predicting that Titanic had another 30 years," Mann said. "But I think it's deteriorating much faster than that now. Perhaps if we get another 15 to 20 years out of it, we're doing good ... eventually there will be nothing left but a rust stain."

The wreck is covered with rusticles; the knob-like mounds have formed from at least 27 strains of bacteria, including Halomonas titanicae.

Rusticles are porous and allow water to pass through; they are rather delicate and will eventually disintegrate into fine powder. "It's a natural process, recycling the iron and returning it to nature," Mann said.

For decades following the ship's sinking in 1912, the Titanic's final resting spot remained a mystery. Discovered by a joint American-French expedition in 1985, the wreck is located a little more than 2 miles (3.8 kilometers) below the ocean surface and some 329 miles (530 km) southeast of Newfoundland, Canada.

In the 25 years since the discovery of the wreck, the Titanic has rapidly deteriorated.