World War II Bombs, Torpedoes and Mines: The Way Marine Life Prosper on Abandoned Armaments

In the brackish waters off the Germany's coast rests a collection of World War II explosives, torpedo heads and mines. Dumped from boats at the conclusion of the World War II and left behind, numerous explosives have accumulated over the decades. They form a decaying layer on the shallow, silty ocean floor of the Bay of Lübeck in the western part of the Baltic.

Over the decades, the explosive stockpile was ignored and neglected. A growing number of visitors came to the sandy beaches and calm waters for water sports, kite surfing and entertainment venues. Underwater, the munitions eroded.

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

When the first scientists went investigating to see what they were doing to the ecosystem, the team anticipated finding a desert, with no organisms because it was all contaminated, says Andrey Vedenin.

What they observed astonished them. Vedenin recounts his colleagues shouting with surprise when the ROV first transmitted footage. This was a great moment, he notes.

Numerous of sea creatures had established habitats on the munitions, developing a renewed marine community more populous than the sea floor around it.

This ocean community was proof to the persistence of marine life. It is actually astonishing how much marine organisms we observe in places that are supposed to be dangerous and dangerous, he states.

Over 40 starfish had gathered on to one exposed fragment of explosive material. They were residing on iron containers, ignition chambers and storage boxes just centimetres from its volatile core. Fish, crabs, sea anemones and mussels were all observed on the discarded explosives. You could compare it with a reef ecosystem in terms of the quantity of creatures that was there, says Vedenin.

Unexpected Creature Concentration

An mean of more than 40,000 creatures were living on every square metre of the weapons, scientists documented in their research on the discovery. The surrounding area was much sparser, with only 8,000 individuals on every meter squared.

It is paradoxical that things that are designed to destroy all life are attracting so much marine organisms, says Vedenin. One can observe how the natural world evolves after a major disaster such as the second world war and how, in certain respects, life finds its way to the most risky places.

Man-made Features as Marine Environments

Artificial constructions such as shipwrecks, offshore windfarms, oil rigs and undersea pipes can offer alternatives, restoring some of the removed marine environment. This study shows that explosives could be similarly positive – the proliferation of marine organisms on those in the Bay of Lübeck is likely to be repeated elsewhere.

Between 1946 and the post-war period, 1.6m tonnes of munitions were discarded off the German shoreline. Numerous of workers placed them in vessels; a portion were dropped in specific sites, others just thrown overboard en route. This is the first time experts have documented how ocean organisms has responded.

Worldwide Instances of Ocean Adaptation

• In the US, decommissioned energy installations have become marine habitats
• Shipwrecks from the World War I have become homes for wildlife along the Potomac in the state of Maryland
• Tank tracks that have become environment to reef-building organisms off Asan in the Pacific island

These locations become even more crucial for marine life as the marine environments are increasingly denuded by commercial fishing, seafloor dredging and anchoring. Shipwrecks and explosive disposal locations essentially function as protected areas – they are not national parks, but nearly any kind of human activity is prohibited, states Vedenin. Therefore a numerous of marine species that are typically uncommon or diminishing, such as the Baltic cod, are flourishing.

Future Issues

Anywhere military conflict has occurred in the past 100 years, surrounding seas are usually strewn with weapons, explains Vedenin. Many millions of tonnes of explosive material rest in our seas.

The sites of these weapons are inadequately mapped, partly because of international boundaries, restricted armed forces records and the reality that documents are hidden in old files. They create an detonation and safety danger, as well as danger from the persistent leakage of hazardous substances.

As the German government and different states embark on extracting these remains, researchers aim to preserve the marine communities that have developed around them. In the Lübeck Bay explosives are currently being removed.

Researchers recommend replace these metal carcasses originating from munitions with certain more secure, various safe objects, like maybe concrete structures, says Vedenin.

He now wishes that what happens in Lübeck establishes a example for substituting material after munitions removal elsewhere – because also the most destructive explosives can become foundation for marine organisms.