Nazi Bombs, Torpedo Heads and Naval Mines: The Way Marine Life Flourishes on Abandoned Weapons

In the brackish sea off the German coast sits a wasteland of Nazi bombs, torpedoes and naval mines. Thrown off boats at the conclusion of the second world war and left behind, numerous weapons have become matted together over the decades. They create a corroding carpet on the shallow, silty seafloor of the Bay of Lübeck in the western tip of the Baltic Sea.

Over the decades, the Nazi arsenal was overlooked and forgotten about. A increasing amount of visitors traveled to the coastal areas and calm waters for jetskiing, kiteboarding and entertainment venues. Beneath the surface, the munitions deteriorated.

Researchers anticipated to see a desert, with no life because it was all contaminated, says Andrey Vedenin.

When the team went looking to see what they were affecting to the marine environment, researchers anticipated finding a lifeless zone, with nothing living there because it was all toxic, says a scientist.

What they observed astonished them. Vedenin recounts his team members shouting with surprise when the ROV first sent the images back. This was a great moment, he recalls.

Numerous of ocean life had made their homes amid the munitions, creating a revitalized habitat richer than the ocean bottom nearby.

This marine city was evidence to the tenacity of marine life. Truly surprising how much marine organisms we discover in areas that are considered dangerous and dangerous, he explains.

Over 40 starfish had gathered on to one exposed chunk of explosive material. They were dwelling on steel casings, ignition chambers and storage boxes just centimetres from its volatile core. Fish, crustaceans, anemones and bivalves were all observed on the old munitions. It's similar to a coral reef in terms of the amount of creatures that was present, notes Vedenin.

Surprising Creature Concentration

An mean of more than 40,000 organisms were residing on every square metre of the explosives, researchers reported in their paper on the observation. The nearby seabed was much sparser, with only eight thousand individuals on every meter squared.

It is paradoxical that objects that are meant to kill all life are hosting so much life, says Vedenin. It's evident how nature adjusts after a devastating occurrence such as the World War II and how, in certain respects, life finds its way to the most risky places.

Artificial Structures as Ocean Environments

Man-made constructions such as shipwrecks, offshore windfarms, drilling platforms and pipelines can offer alternatives, compensating for some of the destroyed habitat. This study demonstrates that weapons could be similarly advantageous – the bloom of life on those in the Lübeck Bay is likely to be duplicated elsewhere.

Between 1946 and 1948, 1.6 million tonnes of arms were discarded off the German shoreline. Thousands of individuals placed them in boats; a portion were dropped in specific sites, others just dumped during transport. This is the initial instance scientists have recorded how marine life has adapted.

Worldwide Examples of Marine Transformation

• In the US, decommissioned energy installations have transformed into coral reefs
• Submerged vessels from the first world war have become homes for marine life along the Potomac in the state of Maryland
• Military vehicle parts that have become home to coral off Asan beach in the Pacific island

These areas become even more important for marine life as the seas are increasingly stripped by commercial fishing, seafloor dredging and anchoring. Sunken ships and munitions areas effectively function as sanctuaries – they are not official reserves, but nearly any kind of human activity is restricted, explains Vedenin. As a result a lot of organisms that are usually rare or declining, such as the Baltic cod, are flourishing.

Future Factors

Wherever armed conflict has taken place in the recent history, surrounding seas are often containing munitions, explains Vedenin. Millions of tons of dangerous substances rest in our oceans.

The locations of these explosives are inadequately documented, partly because of international boundaries, classified armed forces records and the situation that archives are buried in old files. They present an detonation and security hazard, as well as threat from the ongoing leakage of hazardous substances.

As the German government and additional nations start extracting these artifacts, experts hope to safeguard the habitats that have developed in their vicinity. In the Lübeck Bay explosives are already being removed.

It would be wise to replace these iron structures left from weapons with some safer, some safe materials, like possibly man-made habitats, suggests Vedenin.

He now hopes that what happens in the Bay of Lübeck establishes a precedent for replacing material after munitions removal in different areas – because even the most harmful armaments can become framework for marine organisms.