Nazi Munitions, Torpedo Heads and Mines: How Marine Life Prosper on Abandoned Weapons

In the brackish sea off the German coast rests a graveyard of Nazi bombs, torpedo heads and mines. Discarded from vessels at the conclusion of the second world war and forgotten about, thousands munitions have fused into clusters over the years. They comprise a decaying blanket on the low-depth, silty seafloor of the Lübeck Bay in the western part of the Baltic.

Over the decades, the Nazi arsenal was ignored and forgotten about. A increasing amount of visitors flocked to the coastal areas and tranquil sea for jetskiing, kiteboarding and entertainment venues. Beneath the surface, the weapons eroded.

Researchers expected to see a barren area, with no organisms because it was all poisoned, states Andrey Vedenin.

When the first scientists went searching to see what they were affecting to the ecosystem, some of us expected to see a barren area, with nothing living there because it was all contaminated, states the lead researcher.

What they discovered surprised them. Vedenin recounts his team members reacting with shock when the submersible first sent the images back. That moment was a great moment, he notes.

Numerous of ocean life had settled among the munitions, creating a revitalized marine community richer than the seabed around it.

This underwater metropolis was testament to the persistence of marine life. Truly remarkable how much marine organisms we discover in places that are expected to be toxic and dangerous, he says.

In excess of 40 starfish had gathered on to one accessible piece of TNT. They were residing on metal shells, detonator compartments and storage boxes just a short distance from its volatile core. Marine fish, crustaceans, anemones and bivalves were all observed on the discarded explosives. You could compare it with a reef ecosystem in terms of the abundance of animal life that was there, states Vedenin.

Remarkable Creature Concentration

An mean of more than forty thousand creatures were dwelling on every meter squared of the munitions, experts reported in their paper on the observation. The nearby seabed was much poorer in life, with only 8,000 individuals on every meter squared.

It is surprising that objects that are intended to eliminate everything are hosting so much marine organisms, explains Vedenin. You can see how the natural world adjusts 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.

Man-made Features as Marine Habitats

Man-made structures such as sunken vessels, offshore windfarms, drilling platforms and undersea pipes can create substitutes, replacing some of the destroyed marine environment. This study shows that munitions could be comparably beneficial – the explosion of marine organisms on those in the Bay of Lübeck is expected to be duplicated elsewhere.

Between 1946 and the post-war period, 1.6m tonnes of weapons were disposed of off the German coast. Countless of individuals placed them in vessels; a portion were placed in designated areas, others just discarded at sea during transport. This is the first time researchers have studied how ocean organisms has adapted.

Worldwide Instances of Ocean Transformation

• In the United States, decommissioned drilling platforms have turned into marine habitats
• Sunken ships from the first world war have become homes for marine life along the Potomac River in the state of Maryland
• Tank tracks that have become habitat to coral off Asan in Guam

These areas become even more important for wildlife as the seas are increasingly depleted by fishing, bottom trawling and boat mooring. Shipwrecks and weapons dump sites practically act as sanctuaries – they are not national parks, but virtually any kind of anthropogenic disturbance is prohibited, states Vedenin. Consequently a numerous of species that are typically scarce or decreasing, such as the cod fish, are prospering.

Future Factors

Wherever armed conflict has taken place in the recent history, surrounding seas are typically strewn with weapons, says Vedenin. Many millions of tons of dangerous substances rest in our oceans.

The locations of these weapons are poorly recorded, partly because of national borders, secret armed forces records and the reality that archives are hidden in historic archives. They create an explosion and safety danger, as well as threat from the persistent leakage of poisonous compounds.

As Germany and other countries embark on extracting these artifacts, experts plan to protect the marine communities that have developed in their vicinity. In the Lübeck Bay explosives are already being removed.

Researchers recommend substitute these steel remains left from munitions with some safer, some harmless structures, like maybe artificial reefs, says Vedenin.

He currently aspires that what occurs in Lübeck establishes a model for replacing habitats after munitions removal in different areas – because even the most damaging explosives can become framework for ocean ecosystems.