Nazi Munitions, Torpedo Heads and Naval Mines: The Way Marine Life Flourishes on Dumped Armaments

In the brackish sea off the Germany's coast rests a wasteland of Nazi bombs, torpedo heads and mines. Thrown off vessels at the conclusion of the World War II and left behind, thousands explosives have become matted together over the years. They create a rusting carpet on the low-depth, silty seafloor of the Lübeck Bay in the western tip of the Baltic Sea.

Over the decades, the wartime weapons was overlooked and neglected. A increasing amount of tourists traveled to the coastal areas and tranquil sea for jetskiing, kite surfing and entertainment venues. Underwater, the weapons deteriorated.

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

When the first scientists went looking to see what they were affecting to the marine environment, some of us thought they would find a barren area, with nothing living there because it was all contaminated, states Andrey Vedenin.

What they discovered surprised them. Vedenin recalls his team members reacting with shock when the submersible first transmitted footage. This was a memorable occasion, he notes.

Thousands of marine animals had established habitats on the explosives, developing a revitalized ecosystem richer than the ocean bottom around it.

This underwater metropolis was proof to the persistence of life. It is actually astonishing how much marine organisms we find in places that are considered toxic and dangerous, he explains.

More than 40 starfish had clustered on to one visible fragment of explosive material. They were residing on metal shells, detonator compartments and carrying containers just a short distance from its dangerous content. Marine fish, crustaceans, anemones and mussels were all observed on the historic weapons. It's similar to a reef ecosystem in terms of the quantity of fauna that was inhabiting the area, states Vedenin.

Remarkable Creature Concentration

An mean of more than 40,000 organisms were living on every square metre of the weapons, scientists documented in their paper on the discovery. The nearby seabed was much sparser, with only eight thousand organisms on every meter squared.

It is ironic that things that are designed to kill all life are hosting so much marine organisms, states Vedenin. You can see how the natural world adjusts after a major disaster such as the second world war and how, in certain respects, marine life returns to the most risky areas.

Man-made Structures as Marine Habitats

Artificial constructions such as sunken vessels, offshore windfarms, oil rigs and undersea pipes can provide alternatives, compensating for some of the lost habitat. This investigation shows that weapons could be similarly positive – the explosion of marine organisms on those in the Lübeck Bay is probable to be duplicated in different areas.

Between the late 1940s and 1948, 1.6 million tons of munitions were disposed of off the Germany's shoreline. Numerous of individuals transported them in barges; a portion were dropped in specific areas, the remainder just discarded at sea while traveling. This is the initial instance scientists have documented how marine life has adapted.

Worldwide Examples of Ocean Adaptation

  • In the US, retired energy installations have become marine habitats
  • Shipwrecks from the World War I have become habitats for wildlife along the Potomac River in Maryland
  • Military vehicle parts that have become home to reef-building organisms off Asan in Guam

These areas become even more valuable for marine life as the oceans are increasingly depleted by commercial fishing, seafloor dredging and boat mooring. Sunken ships and weapons dump sites essentially function as refuges – they are not national parks, but almost any kind of anthropogenic disturbance is banned, explains Vedenin. Therefore a many of marine species that are usually scarce or declining, such as the Baltic cod, are thriving.

Future Factors

Wherever military conflict has taken place in the last century, adjacent waters are often containing munitions, explains Vedenin. Many millions of tons of volatile compounds lie in our seas.

The positions of these explosives are inadequately recorded, partly because of sovereign limits, restricted military information and the fact that documents are hidden in old files. They create an explosion and safety hazard, as well as risk from the ongoing leakage of poisonous compounds.

As the German government and other countries begin extracting these artifacts, researchers hope to preserve the marine communities that have formed around them. In the Bay of Lübeck munitions are already being extracted.

It would be wise to substitute these iron structures left from weapons with some safer, various harmless materials, like perhaps concrete structures, suggests Vedenin.

He currently wishes that what occurs in the Bay of Lübeck creates a example for replacing structures after weapon clearance in different areas – because also the most harmful armaments can become foundation for marine organisms.

Samantha Henderson
Samantha Henderson

Elara is a tech journalist and digital strategist with over a decade of experience covering emerging technologies and their impact on society.