Nazi Munitions, Torpedo Heads and Naval Mines: How Ocean Creatures Thrives on Discarded Armaments

In the brackish waters off the Germany's shoreline lies a wasteland of Nazi bombs, torpedoes and naval mines. Dumped from vessels at the conclusion of the second world war and left behind, numerous weapons have fused into clusters over the years. They form a rusting layer on the shallow, silty seafloor of the Bay of Lübeck in the western part of the Baltic Sea.

Over the years, the Nazi arsenal was ignored and forgotten about. A increasing amount of visitors came to the coastal areas and calm waters for water sports, kiteboarding and amusement parks. Underwater, the weapons deteriorated.

We initially anticipated to see a barren area, with no organisms because it was all poisoned, states the lead researcher.

When the first scientists went investigating to see what they were affecting to the marine environment, the team expected to see a desert, with nothing living there because it was all contaminated, says the lead researcher.

What they discovered astonished them. Vedenin recounts his team members reacting with shock when the submersible first relayed pictures. It was a memorable occasion, he notes.

Numerous of sea creatures had made their homes on the explosives, creating a renewed marine community more populous than the ocean bottom surrounding it.

This ocean community was proof to the persistence of marine life. It is actually surprising how much life we find in locations that are expected to be dangerous and dangerous, he states.

More than 40 sea stars had piled on to one visible fragment of TNT. They were living on metal shells, ignition chambers and storage boxes just a short distance from its explosive filling. Fish, crabs, sea anemones and mussels were all found on the old munitions. It's similar to a marine reef in terms of the amount of fauna that was inhabiting the area, states Vedenin.

Surprising Creature Concentration

An mean of more than forty thousand creatures were dwelling on every square metre of the munitions, scientists documented in their paper on the discovery. The nearby seabed was much sparser, with only 8,000 creatures on every meter squared.

It is paradoxical that objects that are designed to kill everything are hosting so much life, states Vedenin. You can see how the natural world evolves after a devastating occurrence such as the World War II and how, in certain respects, marine life finds its way to the most hazardous places.

Man-made Structures as Marine Habitats

Man-made features such as sunken vessels, wind turbines, oil rigs and pipelines can create replacements, replacing some of the removed marine environment. This research demonstrates that weapons could be equally positive – the bloom of life on those in the Lübeck Bay is likely to be found elsewhere.

Between 1946 and the post-war period, 1.6m tonnes of munitions were disposed of off the German shoreline. Thousands of workers placed them in vessels; a portion were dropped in specific sites, the remainder just discarded at sea en route. This is the first time researchers have recorded how marine life has reacted.

Global Instances of Marine Adaptation

• In the US, retired oil and gas structures have become coral reefs
• Shipwrecks from the World War I have become homes for wildlife along the Potomac in Maryland
• Military vehicle parts that have become home to coral off Asan in Guam

These locations become even more crucial for marine life as the seas are increasingly stripped by commercial fishing, seafloor dredging and boat mooring. Shipwrecks and munitions areas essentially function as refuges – they are not national parks, but nearly any kind of human activity is restricted, says Vedenin. Consequently a many of organisms that are otherwise rare or declining, such as the cod fish, are flourishing.

Future Factors

Wherever armed conflict has taken place in the past 100 years, nearby oceans are typically littered with munitions, states Vedenin. Millions of tons of volatile compounds lie in our marine environments.

The positions of these weapons are insufficiently documented, in part because of sovereign limits, restricted armed forces records and the reality that documents are hidden in historic archives. They pose an explosion and security risk, as well as threat from the ongoing leakage of poisonous compounds.

As Germany and different states start clearing these remains, scientists hope to safeguard the marine communities that have established nearby. In the Lübeck Bay weapons are presently being extracted.

We should replace these metal carcasses left from munitions with some more secure, some non-dangerous structures, like possibly artificial reefs, suggests Vedenin.

He currently aspires that what transpires in Lübeck sets a precedent for replacing habitats after explosive extraction elsewhere – because including the most damaging armaments can become scaffolding for marine organisms.