World War II Munitions, Torpedoes and Mines: The Way Marine Life Prosper on Dumped Weapons

In the slightly salty sea off the German coast rests a graveyard of Nazi bombs, torpedo heads and naval mines. Discarded from boats at the conclusion of the second world war and neglected, thousands munitions have fused into clusters over the decades. They comprise a corroding carpet on the shallow, silty seafloor of the Lübeck Bay in the western part of the Baltic.

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

We initially thought to see a lifeless zone, with nothing living there because it was all toxic, explains a scientist.

When the initial researchers went looking to see what they were doing to the marine environment, some of us anticipated finding a barren area, with no life because it was all poisoned, states Andrey Vedenin.

What they observed amazed them. Vedenin recounts his colleagues exclaiming in amazement when the ROV first sent the images back. It was a remarkable experience, he recalls.

Numerous of sea creatures had made their homes among the explosives, developing a revitalized marine community more populous than the seabed nearby.

This underwater metropolis was testament to the resilience of life. It is actually remarkable how much life we observe in places that are expected to be toxic and risky, he states.

In excess of 40 starfish had piled on to one exposed chunk of TNT. They were dwelling on iron containers, ignition chambers and storage boxes just a short distance from its dangerous content. Marine fish, crabs, anemones and bivalves were all observed on the discarded explosives. It's similar to a coral reef in terms of the quantity of creatures that was there, says Vedenin.

Unexpected Creature Concentration

An mean of more than 40,000 organisms were residing on every square metre of the weapons, scientists reported in their research on the observation. The adjacent region was much sparser, with only eight thousand individuals on every square metre.

It is paradoxical that things that are intended to kill everything are attracting so much marine organisms, says Vedenin. You can see how the natural world adapts after a devastating occurrence such as the World War II and how, in certain respects, life returns to the most risky areas.

Man-made Features as Ocean Environments

Man-made features such as shipwrecks, offshore windfarms, oil rigs and undersea pipes can offer substitutes, restoring some of the destroyed marine environment. This research reveals that weapons could be equally beneficial – the bloom of life on those in the Lübeck Bay is probable to be duplicated elsewhere.

Between the late 1940s and the post-war period, 1.6m tons of weapons were dumped off the German coast. Numerous of individuals loaded them in vessels; a portion were deposited in allocated locations, others just dumped during transport. This is the initial instance researchers have recorded how marine life has responded.

Global Examples of Marine Transformation

• In the United States, retired oil and gas structures have become marine habitats
• Submerged vessels from the World War I have become homes for creatures along the Potomac in Maryland
• Tank tracks that have become habitat to reef-building organisms off Asan beach in Guam

These locations become even more valuable for organisms as the seas are increasingly depleted by commercial fishing, seafloor dredging and boat mooring. Sunken ships and munitions areas practically act as refuges – they are not official reserves, but almost any kind of anthropogenic disturbance is prohibited, explains Vedenin. Consequently a numerous of marine species that are typically rare or decreasing, such as the Baltic cod, are flourishing.

Coming Factors

Wherever warfare has happened in the last century, surrounding seas are typically strewn with explosives, explains Vedenin. Many millions of tonnes of explosive material remain in our marine environments.

The locations of these munitions are insufficiently documented, in part because of national borders, classified defense data and the fact that archives are stored in historical records. They pose an explosion and security danger, as well as danger from the ongoing release of toxic chemicals.

As the German government and different states start extracting these artifacts, experts aim to protect the marine communities that have developed in their vicinity. In the Bay of Lübeck weapons are currently being cleared.

Researchers recommend substitute these steel remains remaining from weapons with certain more secure, some harmless objects, like possibly artificial reefs, states Vedenin.

He now aspires that what occurs in the Bay of Lübeck establishes a precedent for replacing structures after weapon clearance in other locations – because including the most harmful weaponry can become framework for ocean ecosystems.