World War II Explosives, Torpedoes and Mines: The Way Ocean Creatures Thrives on Discarded Weapons

In the slightly salty waters off the German shoreline sits a collection of Nazi bombs, torpedoes and naval mines. Dumped from boats at the end of the second world war and neglected, thousands explosives have fused into clusters over the decades. They form a rusting carpet on the low-depth, muddy seafloor of the Lübeck Bay in the western tip of the Baltic.

Over the years, the Nazi arsenal was ignored and neglected. A growing number of tourists came to the coastal areas and tranquil sea for water sports, kiteboarding and amusement parks. Underwater, the munitions decayed.

We initially anticipated to see a barren area, with no life because it was all poisoned, states a scientist.

When the team went investigating to see what they were affecting to the ecosystem, some of us expected to see a barren area, with no life because it was all toxic, explains the lead researcher.

What they found surprised them. Vedenin recounts his scientists shouting with surprise when the submersible first sent the images back. This was a remarkable experience, he notes.

Numerous of ocean life had established habitats on the explosives, developing a renewed habitat more populous than the sea floor around it.

This marine city was testament to the persistence of life. It is actually astonishing how much marine organisms we discover in places that are considered hazardous and harmful, he explains.

In excess of 40 starfish had piled on to one visible piece of explosive material. They were dwelling on metal shells, fuse pockets and storage boxes just a short distance from its dangerous content. Fish, crustaceans, anemones and bivalves were all found on the old munitions. You could compare it with a coral reef in terms of the quantity of creatures that was there, states Vedenin.

Remarkable Population Density

An mean of more than 40,000 creatures were dwelling on every meter squared of the weapons, scientists documented in their paper on the discovery. The adjacent region was much sparser, with only 8,000 individuals on every square metre.

It is surprising that things that are designed to destroy all life are attracting so much marine organisms, states Vedenin. It's evident how the natural world adjusts after a major disaster such as the World War II and how, in some way, marine life establishes itself to the most dangerous places.

Man-made Features as Ocean Habitats

Artificial structures such as sunken vessels, offshore windfarms, drilling platforms and pipelines can offer replacements, replacing some of the destroyed marine environment. This study shows that weapons could be comparably advantageous – the proliferation of life on those in the Bay of Lübeck is expected to be found elsewhere.

Between 1946 and the post-war period, 1.6 million tonnes of munitions were disposed of off the Germany's coast. Numerous of individuals transported them in vessels; a portion were dropped in specific locations, others just thrown overboard during transport. This is the initial instance scientists have recorded how ocean organisms has responded.

Global Examples of Ocean Adaptation

• In the United States, decommissioned oil and gas structures have become coral reefs
• Submerged vessels from the first world war have become environments for creatures along the Potomac River in the state of Maryland
• Military vehicle parts that have become environment to coral off Asan in Guam

These areas become even more valuable for organisms as the seas are increasingly denuded by commercial fishing, bottom trawling and anchoring. Sunken ships and explosive disposal locations effectively act as refuges – they are not official reserves, but nearly any kind of human activity is banned, says Vedenin. Therefore a numerous of species that are typically rare or declining, such as the cod fish, are prospering.

Coming Considerations

Wherever warfare has happened in the last century, surrounding seas are often littered with munitions, states Vedenin. Many millions of tons of dangerous substances lie in our oceans.

The positions of these weapons are poorly documented, partly because of international boundaries, classified military information and the reality that archives are stored in old files. They pose an explosion and safety danger, as well as risk from the persistent emission of hazardous substances.

As Germany and different states start clearing these remains, researchers aim to protect the ecosystems that have developed nearby. In the Bay of Lübeck explosives are presently being extracted.

We should substitute these metal carcasses left from munitions with some less dangerous, various non-dangerous materials, like maybe artificial reefs, suggests Vedenin.

He presently aspires that what occurs in the Bay of Lübeck sets a model for substituting structures after explosive extraction in other locations – because including the most harmful weaponry can become scaffolding for marine organisms.