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

In the brackish sea off the Germany's shoreline sits a collection of Nazi bombs, torpedoes and mines. Discarded from boats at the end of the second world war and neglected, thousands explosives have fused into clusters over the years. They comprise a corroding carpet on the low-depth, muddy ocean floor of the Lübeck Bay in the western part of the Baltic Sea.

Over the years, the explosive stockpile was ignored and forgotten about. A growing number of visitors flocked to the sandy beaches and calm waters for jetskiing, kiteboarding and entertainment venues. Underwater, the weapons eroded.

Researchers anticipated to see a lifeless zone, with no organisms because it was all contaminated, says Andrey Vedenin.

When the first scientists went searching to see what they were doing to the ecosystem, some of us anticipated finding a desert, with no organisms because it was all contaminated, explains the lead researcher.

What they observed astonished them. Vedenin remembers his team members exclaiming in amazement when the submersible first sent the images back. That moment was a memorable occasion, he recalls.

Countless of sea creatures had established habitats among the weapons, forming a revitalized ecosystem richer than the sea floor surrounding it.

This ocean community was testament to the tenacity of marine life. It is actually remarkable how much marine organisms we observe in locations that are expected to be hazardous and dangerous, he states.

Over 40 sea stars had clustered on to one accessible chunk of TNT. They were dwelling on iron containers, ignition chambers and transport cases just a short distance from its volatile core. Fish, crustaceans, sea anemones and bivalves were all found on the historic weapons. It's similar to a coral reef in terms of the quantity of fauna that was present, states Vedenin.

Remarkable Population Density

An average of more than forty thousand animals were living on every square metre of the munitions, scientists reported in their paper on the discovery. The nearby seabed was much poorer in life, with only eight thousand organisms on every meter squared.

It is paradoxical that items that are designed to kill all life are hosting so much life, says Vedenin. You can see how nature adjusts after a major disaster such as the World War II and how, in certain respects, life returns to the most dangerous areas.

Artificial Structures as Ocean Habitats

Man-made features such as shipwrecks, offshore windfarms, drilling platforms and undersea pipes can create alternatives, restoring some of the lost marine environment. This study reveals that weapons could be similarly positive – the explosion of marine organisms on those in the Lübeck Bay is probable to be repeated in other locations.

Between the late 1940s and 1948, 1.6 million tonnes of munitions were disposed of off the German coast. Countless of workers loaded them in vessels; a portion were dropped in specific sites, the remainder just thrown overboard while traveling. This is the initial instance experts have studied how marine life has reacted.

Worldwide Examples of Ocean Adaptation

• In the United States, decommissioned drilling platforms have turned into coral reefs
• Submerged vessels from the first world war have become environments for wildlife along the Potomac in the state of Maryland
• Military vehicle parts that have become home to reef-building organisms off Asan beach in the Pacific island

These areas become even more crucial for organisms as the seas are increasingly denuded by commercial fishing, bottom trawling and anchoring. Sunken ships and explosive disposal locations effectively function as sanctuaries – they are not national parks, but nearly any kind of anthropogenic disturbance is banned, states Vedenin. As a result a many of marine species that are otherwise uncommon or decreasing, such as the cod fish, are prospering.

Future Issues

Wherever warfare has occurred in the past 100 years, adjacent waters are often littered with weapons, says Vedenin. Millions of tonnes of explosive material rest in our oceans.

The sites of these explosives are insufficiently recorded, partly because of sovereign limits, classified armed forces records and the situation that archives are stored in historical records. They present an explosion and security hazard, as well as danger from the ongoing leakage of poisonous compounds.

As Germany and additional nations start removing these artifacts, scientists hope to safeguard the habitats that have formed nearby. In the Lübeck Bay explosives are currently being cleared.

It would be wise to substitute these metal carcasses originating from munitions with some safer, some non-dangerous structures, like maybe concrete structures, suggests Vedenin.

He now hopes that what occurs in the Bay of Lübeck establishes a precedent for replacing habitats after explosive extraction elsewhere – because also the most damaging explosives can become foundation for marine organisms.