Nazi Explosives, Torpedo Heads and Mines: The Way Ocean Creatures Prosper on Abandoned Weapons

In the slightly salty waters off the Germany's coast rests a wasteland of Nazi bombs, torpedo heads and naval mines. Thrown off vessels at the conclusion of the World War II and forgotten about, thousands explosives have become matted together over the years. They create a rusting carpet on the shallow, muddy seafloor of the Bay of Lübeck in the western part of the Baltic Sea.

Over the decades, the Nazi arsenal was overlooked and forgotten about. A increasing amount of visitors flocked to the sandy beaches and tranquil sea for water sports, kiteboarding and amusement parks. Below the waves, the munitions decayed.

We initially anticipated to see a barren area, with no life because it was all toxic, explains Andrey Vedenin.

When the first scientists went investigating to see what they were affecting to the marine environment, some of us anticipated finding a barren area, with no organisms because it was all poisoned, says a scientist.

What they found astonished them. Vedenin remembers his team members exclaiming in amazement when the submersible first relayed pictures. It was a memorable occasion, he notes.

Thousands of marine animals had established habitats amid the explosives, creating a regenerated marine community denser than the ocean bottom surrounding it.

This ocean community was testament to the resilience of marine life. It is actually astonishing how much life we find in areas that are supposed to be dangerous and risky, he explains.

More than 40 starfish had clustered on to one visible fragment of TNT. They were dwelling on iron containers, ignition chambers and transport cases just centimetres from its explosive filling. Marine fish, crabs, sea anemones and mussels were all discovered on the old munitions. It resembles a coral reef in terms of the quantity of creatures that was present, notes Vedenin.

Surprising Creature Concentration

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

It is paradoxical that things that are intended to eliminate everything are attracting so much life, explains Vedenin. You can see how nature adapts after a devastating occurrence such as the second world war and how, in certain respects, life returns to the most hazardous areas.

Man-made Structures as Marine Habitats

Artificial structures such as sunken vessels, wind turbines, oil rigs and undersea pipes can create replacements, compensating for some of the destroyed habitat. This investigation reveals that munitions could be comparably advantageous – the proliferation of life on those in the Bay of Lübeck is likely to be repeated elsewhere.

Between the late 1940s and 1948, 1.6m tonnes of munitions were dumped off the Germany's shoreline. Countless of individuals loaded them in vessels; a portion were dropped in designated sites, the remainder just thrown overboard en route. This is the first time researchers have studied how ocean organisms has reacted.

Global Instances of Marine Adaptation

• In the US, decommissioned energy installations have turned into coral reefs
• Sunken ships from the World War I have become environments for marine life along the Potomac River in Maryland
• Tank tracks that have become environment to reef-building organisms off Asan in Guam

These areas become even more valuable for organisms as the oceans are increasingly depleted by fishing, seafloor dredging and anchoring. Sunken ships and explosive disposal locations effectively serve as protected areas – they are not national parks, but almost any kind of human activity is restricted, says Vedenin. Consequently a numerous of species that are typically scarce or decreasing, such as the cod fish, are thriving.

Coming Issues

Wherever military conflict has occurred in the past 100 years, surrounding seas are typically littered with weapons, says Vedenin. Many millions of tonnes of dangerous substances lie in our marine environments.

The positions of these explosives are insufficiently mapped, in part because of national borders, classified defense data and the situation that records are hidden in historic archives. They pose an explosion and safety hazard, as well as threat from the persistent leakage of hazardous substances.

As the German government and different states embark on removing these artifacts, researchers hope to protect the habitats that have developed nearby. In the Bay of Lübeck munitions are presently being cleared.

We should replace these steel remains remaining from weapons with certain more secure, various non-dangerous structures, like possibly artificial reefs, states Vedenin.

He now wishes that what transpires in the Bay of Lübeck establishes a example for substituting material after explosive extraction in other locations – because also the most harmful explosives can become scaffolding for marine organisms.