Nazi Explosives, Torpedo Heads and Mines: How Ocean Creatures Thrives on Dumped Armaments

In the brackish waters off the Germany's coast sits a graveyard of Nazi bombs, torpedoes and mines. Discarded from boats at the conclusion of the second world war and left behind, thousands munitions have become matted together over the years. They form a corroding layer on the shallow, silty seafloor of the Lübeck Bay in the western tip of the Baltic.

Over the decades, the Nazi arsenal was overlooked and neglected. A growing number of visitors flocked to the sandy beaches and calm waters for jetskiing, kite surfing and amusement parks. Below the waves, the munitions eroded.

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

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

What they found amazed them. Vedenin remembers his scientists reacting with shock when the ROV first sent the images back. It was a great moment, he recalls.

Numerous of marine animals had made their homes amid the munitions, forming a renewed habitat more populous than the seabed around it.

This underwater metropolis was evidence to the resilience of life. Indeed astonishing how much life we observe in areas that are considered hazardous and harmful, he states.

In excess of 40 sea stars had clustered on to one visible fragment of explosive material. They were residing on steel casings, fuse pockets and storage boxes just a short distance from its dangerous content. Marine fish, crustaceans, anemones and bivalves were all found on the old munitions. You could compare it with a reef ecosystem in terms of the amount of fauna that was present, says Vedenin.

Unexpected Population Density

An average of more than forty thousand creatures were residing on every meter squared of the weapons, researchers reported in their study on the discovery. The surrounding area was much sparser, with only 8,000 organisms on every square metre.

It is surprising that objects that are meant to kill all life are drawing so much life, explains Vedenin. One can observe how nature adjusts after a catastrophic event such as the second world war and how, in some way, life returns to the most risky places.

Man-made Features as Ocean Environments

Artificial structures such as sunken vessels, wind turbines, drilling platforms and undersea pipes can create substitutes, compensating for some of the lost habitat. This investigation demonstrates that explosives could be similarly positive – the proliferation of marine organisms on those in the Bay of Lübeck is expected to be repeated in different areas.

Between 1946 and 1948, 1.6 million tons of arms were disposed of off the Germany's coast. Numerous of workers loaded them in boats; some were deposited in specific sites, the remainder just discarded at sea during transport. This is the first time experts have studied how marine life has responded.

Global Examples of Marine Adaptation

• In the United States, retired energy installations have turned into reef ecosystems
• Shipwrecks from the World War I have become habitats for creatures along the Potomac in Maryland
• Tank tracks that have become environment to coral off Asan in Guam

These areas become even more important for organisms as the oceans are increasingly depleted by fishing, bottom trawling and anchoring. Sunken ships and weapons dump sites effectively function as protected areas – they are not official reserves, but virtually any kind of anthropogenic disturbance is restricted, states Vedenin. Consequently a numerous of organisms that are typically rare or diminishing, such as the cod fish, are flourishing.

Coming Factors

Wherever armed conflict has happened in the past 100 years, adjacent waters are usually containing weapons, states Vedenin. Millions of tonnes of explosive material remain in our oceans.

The locations of these weapons are poorly documented, partially because of sovereign limits, classified military information and the situation that archives are hidden in historical records. They present an detonation and security danger, as well as risk from the continuous release of toxic chemicals.

As Germany and different states embark on clearing these relics, researchers hope to preserve the habitats that have formed in their vicinity. In the Lübeck Bay weapons are presently being removed.

Researchers recommend substitute these steel remains left from weapons with some more secure, various harmless objects, like possibly concrete structures, says Vedenin.

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