Nazi Bombs, Torpedoes and Mines: The Way Ocean Creatures Prosper on Abandoned Weapons

In the slightly salty sea off the German coast lies a graveyard of Nazi bombs, torpedo heads and mines. Discarded from vessels at the conclusion of the second world war and neglected, numerous explosives have become matted together over the decades. They create a corroding layer on the low-depth, muddy seafloor of the Lübeck Bay in the western part of the Baltic.

Over the years, the wartime weapons was ignored and neglected. A increasing amount of tourists flocked to the coastal areas and calm waters for jetskiing, kite surfing and amusement parks. Beneath the surface, the munitions decayed.

We initially anticipated to see a barren area, with nothing living there because it was all poisoned, explains Andrey Vedenin.

When the team went looking to see what they were doing to the ecosystem, some of us thought they would find a lifeless zone, with nothing living there because it was all contaminated, states a scientist.

What they found amazed them. Vedenin recounts his scientists shouting with surprise when the underwater vehicle first relayed pictures. It was a memorable occasion, he says.

Thousands of marine animals had settled on the weapons, developing a renewed habitat denser than the seabed nearby.

This underwater metropolis was testament to the tenacity of marine life. Indeed surprising how much marine organisms we observe in locations that are supposed to be hazardous and dangerous, he states.

More than 40 starfish had clustered on to one exposed piece of TNT. They were residing on steel casings, fuse pockets and storage boxes just centimetres from its volatile core. Fish, crabs, sea anemones and mussels were all observed on the old munitions. You could compare it with a marine reef in terms of the amount of creatures that was inhabiting the area, states Vedenin.

Remarkable Population Density

An mean of more than 40,000 organisms were living on every meter squared of the weapons, experts reported in their paper on the discovery. The adjacent region was much sparser, with only 8,000 creatures on every meter squared.

It is ironic that items that are meant to eliminate everything are hosting so much life, says Vedenin. One can observe how the natural world evolves after a catastrophic event such as the World War II and how, in certain respects, marine life finds its way to the most dangerous places.

Artificial Features as Marine Habitats

Artificial structures such as sunken vessels, offshore windfarms, drilling platforms and pipelines can offer alternatives, replacing some of the removed habitat. This study shows that weapons could be comparably positive – the bloom of marine organisms on those in the Bay of Lübeck is probable to be found in other locations.

Between 1946 and the post-war period, 1.6 million tons of arms were dumped off the Germany's coast. Countless of people loaded them in vessels; a portion were deposited in designated areas, the remainder just thrown overboard en route. This is the initial instance researchers have documented how ocean organisms has adapted.

Global Examples of Marine Adaptation

• In the United States, decommissioned drilling platforms have turned into marine habitats
• Shipwrecks from the World War I have become homes for wildlife along the Potomac in Maryland
• Tank tracks that have become habitat to coral off Asan in the Pacific island

These places become even more valuable for marine life as the oceans are increasingly depleted by commercial fishing, seafloor dredging and anchoring. Shipwrecks and weapons dump sites effectively serve as refuges – they are not national parks, but virtually any kind of anthropogenic disturbance is prohibited, explains Vedenin. Consequently a numerous of organisms that are typically scarce or declining, such as the cod fish, are flourishing.

Coming Issues

Wherever armed conflict has occurred in the recent history, surrounding seas are usually strewn with munitions, says Vedenin. Many millions of tons of explosive material lie in our seas.

The sites of these munitions are poorly recorded, partially because of sovereign limits, secret armed forces records and the fact that documents are stored in historic archives. They pose an detonation and security danger, as well as risk from the continuous release of toxic chemicals.

As the German government and additional nations begin clearing these artifacts, experts hope to protect the marine communities that have developed nearby. In the Bay of Lübeck weapons are presently being removed.

It would be wise to substitute these steel remains originating from weapons with some more secure, various safe structures, like maybe concrete structures, states Vedenin.

He presently hopes that what happens in Lübeck establishes a model for substituting habitats after explosive extraction elsewhere – because even the most harmful armaments can become foundation for new life.