Nazi Bombs, Torpedoes and Naval Mines: The Way Marine Life Flourishes on Discarded Armaments

In the brackish waters off the Germany's shoreline rests a wasteland of World War II explosives, torpedoes and mines. Thrown off barges at the end of the second world war and left behind, countless explosives have accumulated over the years. They comprise a rusting carpet on the shallow, muddy seafloor of the Bay of Lübeck in the western tip of the Baltic Sea.

Over the decades, the Nazi arsenal was overlooked and neglected. A growing number of tourists flocked to the sandy beaches and calm waters for jetskiing, kite surfing and entertainment venues. Underwater, the weapons eroded.

We initially anticipated to see a barren area, with nothing living there because it was all toxic, states a scientist.

When the team went searching to see what they were affecting to the ecosystem, some of us anticipated finding a lifeless zone, with nothing living there because it was all poisoned, states a scientist.

What they found surprised them. Vedenin recalls his team members exclaiming in amazement when the ROV first sent the images back. It was a memorable occasion, he recalls.

Numerous of sea creatures had made their homes among the explosives, forming a renewed ecosystem richer than the ocean bottom surrounding it.

This ocean community was evidence to the tenacity of life. Indeed surprising how much life we find in places that are supposed to be toxic and harmful, he states.

In excess of 40 sea stars had piled on to one visible chunk of explosive material. They were living on steel casings, fuse pockets and transport cases just a short distance from its volatile core. Marine fish, crabs, sea anemones and mussels were all observed on the discarded explosives. It's similar to a coral reef in terms of the quantity of animal life that was present, says Vedenin.

Unexpected Creature Concentration

An average of more than 40,000 creatures were residing on every meter squared of the explosives, scientists wrote in their paper on the observation. The nearby seabed was much sparser, with only 8,000 individuals on every meter squared.

It is paradoxical that items that are intended to kill all life are drawing so much marine organisms, explains Vedenin. One can observe how the natural world evolves after a catastrophic event such as the World War II and how, in some way, marine life establishes itself to the most hazardous areas.

Man-made Features as Ocean Environments

Artificial features such as sunken vessels, wind turbines, drilling platforms and undersea pipes can offer substitutes, compensating for some of the lost marine environment. This study demonstrates that munitions could be comparably beneficial – the bloom of life on those in the Lübeck Bay is expected to be repeated in other locations.

Between the late 1940s and the post-war period, 1.6 million tonnes of munitions were dumped off the German coast. Numerous of workers transported them in boats; a portion were placed in designated locations, others just discarded at sea en route. This is the initial instance researchers have studied how marine life has reacted.

Global Instances of Marine Transformation

• In the United States, decommissioned oil and gas structures have transformed into reef ecosystems
• Submerged vessels from the World War I have become environments for wildlife along the Potomac River in the state of Maryland
• Tank tracks that have become environment to reef-building organisms off Asan beach in Guam

These locations become even more crucial for organisms as the marine environments are increasingly denuded by fishing, bottom trawling and boat mooring. Sunken ships and explosive disposal locations practically act as protected areas – they are not official reserves, but almost any kind of anthropogenic disturbance is restricted, says Vedenin. As a result a numerous of species that are otherwise scarce or decreasing, such as the cod fish, are flourishing.

Coming Issues

Wherever military conflict has happened in the past 100 years, surrounding seas are usually containing explosives, says Vedenin. Many millions of tonnes of explosive material remain in our seas.

The locations of these weapons are poorly mapped, in part because of international boundaries, restricted military information and the situation that records are hidden in historical records. They present an detonation and safety risk, as well as threat from the persistent emission of poisonous compounds.

As Germany and different states start removing these remains, scientists aim to preserve the marine communities that have formed nearby. In the Bay of Lübeck munitions are currently being extracted.

We should substitute these steel remains remaining from munitions with some safer, some non-dangerous materials, like possibly artificial reefs, says Vedenin.

He currently aspires that what occurs in Lübeck establishes a example for substituting habitats after weapon clearance in other locations – because including the most destructive weaponry can become framework for marine organisms.