World War II Bombs, Torpedoes and Mines: How Ocean Creatures Prosper on Dumped Weapons

In the slightly salty waters off the German coast lies a wasteland of World War II explosives, torpedoes and mines. Thrown off vessels at the conclusion of the second world war and left behind, thousands explosives have fused into clusters over the years. They comprise a corroding blanket on the shallow, muddy seafloor of the Lübeck Bay in the western part of the Baltic.

Over the decades, the Nazi arsenal was ignored and forgotten about. A growing number of tourists flocked to the sandy beaches and tranquil sea for jetskiing, kite surfing and entertainment venues. Below the waves, the munitions deteriorated.

Researchers anticipated to see a lifeless zone, with nothing living there because it was all contaminated, states the lead researcher.

When the first scientists went looking to see what they were affecting to the ecosystem, the team anticipated finding a desert, with no organisms because it was all toxic, explains the lead researcher.

What they found amazed them. Vedenin recalls his scientists shouting with surprise when the submersible first sent the images back. That moment was a remarkable experience, he says.

Numerous of marine animals had settled on the explosives, developing a revitalized habitat denser than the ocean bottom nearby.

This marine city was evidence to the persistence of marine life. Indeed remarkable how much life we observe in locations that are expected to be toxic and harmful, he explains.

In excess of 40 starfish had clustered on to one accessible chunk of explosive material. They were living on steel casings, detonator compartments and storage boxes just a short distance from its explosive filling. Marine fish, crabs, anemones and mussels were all observed on the historic weapons. It's similar to a reef ecosystem in terms of the quantity of creatures that was present, states Vedenin.

Unexpected Population Density

An mean of more than 40,000 animals were living on every meter squared of the munitions, researchers reported in their research on the discovery. The nearby seabed was much sparser, with only eight thousand organisms on every square metre.

It is surprising that things that are intended to destroy all life are drawing so much marine organisms, states Vedenin. It's evident how the natural world evolves after a catastrophic event such as the second world war and how, in some way, marine life establishes itself to the most risky areas.

Man-made Structures as Ocean Environments

Artificial features such as sunken vessels, wind turbines, oil rigs and undersea pipes can create replacements, compensating for some of the removed marine environment. This study demonstrates that munitions could be equally beneficial – the bloom of life on those in the Bay of Lübeck is probable to be duplicated elsewhere.

Between the late 1940s and 1948, 1.6 million tonnes of munitions were discarded off the Germany's coast. Thousands of individuals loaded them in vessels; some were dropped in allocated sites, the remainder just thrown overboard en route. This is the initial instance researchers have recorded how ocean organisms has reacted.

Worldwide Examples of Marine Transformation

• In the US, retired drilling platforms have turned into coral reefs
• Shipwrecks from the first world war have become environments for wildlife along the Potomac River in the state of Maryland
• Tank tracks that have become home to reef-building organisms off Asan beach in Guam

These places become even more crucial for marine life as the seas are increasingly denuded by fishing, seafloor dredging and anchoring. Shipwrecks and munitions areas essentially act as refuges – they are not official reserves, but virtually any kind of anthropogenic disturbance is prohibited, explains Vedenin. Therefore a numerous of organisms that are typically rare or decreasing, such as the Baltic cod, are flourishing.

Future Factors

Wherever military conflict has taken place in the past 100 years, nearby oceans are usually littered with weapons, explains Vedenin. Many millions of tonnes of dangerous substances rest in our marine environments.

The sites of these weapons are poorly recorded, partly because of sovereign limits, classified military information and the situation that archives are hidden in historical records. They present an explosion and safety hazard, as well as risk from the continuous emission of toxic chemicals.

As Germany and other countries begin removing these relics, scientists aim to preserve the ecosystems that have formed nearby. In the Lübeck Bay explosives are currently being cleared.

We should replace these steel remains left from munitions with some safer, various non-dangerous structures, like maybe artificial reefs, says Vedenin.

He presently hopes that what transpires in Lübeck establishes a model for substituting habitats after munitions removal in other locations – because also the most destructive armaments can become foundation for new life.