World War II Munitions, Torpedoes and Naval Mines: The Way Ocean Creatures Flourishes on Discarded Armaments

In the brackish sea off the German shoreline lies a collection of World War II explosives, torpedo heads and naval mines. Discarded from barges at the end of the World War II and neglected, thousands explosives have fused into clusters over the years. They create a corroding blanket on the shallow, muddy seafloor of the Lübeck Bay in the western tip of the Baltic.

Over the decades, the explosive stockpile was ignored and forgotten about. A increasing amount of tourists traveled to the coastal areas and tranquil sea for water sports, kiteboarding and entertainment venues. Underwater, the munitions decayed.

Researchers anticipated to see a lifeless zone, with no organisms because it was all poisoned, says the lead researcher.

When the team went looking to see what they were doing to the marine environment, some of us anticipated finding a lifeless zone, with no organisms because it was all toxic, states Andrey Vedenin.

What they observed amazed them. Vedenin remembers his scientists exclaiming in amazement when the ROV first relayed pictures. This was a remarkable experience, he says.

Thousands of sea creatures had settled on the explosives, forming a regenerated ecosystem richer than the seabed surrounding it.

This marine city was evidence to the persistence of life. Truly astonishing how much life we observe in areas that are supposed to be dangerous and dangerous, he says.

More than 40 starfish had gathered on to one accessible piece of TNT. They were living on steel casings, ignition chambers and carrying containers just centimetres from its explosive filling. Fish, crustaceans, anemones and bivalves were all observed on the old munitions. You could compare it with a coral reef in terms of the quantity of animal life that was there, states Vedenin.

Unexpected Population Density

An average of more than 40,000 animals were dwelling on every square metre of the munitions, scientists reported in their research on the observation. The adjacent region was much less diverse, with only eight thousand creatures on every square metre.

It is surprising that items that are meant to kill everything are hosting so much life, states Vedenin. One can observe how the natural world evolves after a catastrophic event such as the World War II and how, in some way, marine life finds its way to the most hazardous places.

Artificial Features as Marine Environments

Man-made structures such as sunken vessels, offshore windfarms, drilling platforms and pipelines can provide replacements, compensating for some of the lost marine environment. This investigation demonstrates that munitions could be comparably advantageous – the bloom of life on those in the Bay of Lübeck is expected to be duplicated elsewhere.

Between the late 1940s and the post-war period, 1.6m tons of arms were discarded off the German coast. Numerous of people loaded them in boats; a portion were dropped in specific locations, others just discarded at sea while traveling. This is the first time experts have studied how marine life has reacted.

Global Examples of Ocean Transformation

  • In the US, decommissioned drilling platforms have become marine habitats
  • Shipwrecks from the World War I have become environments for marine life along the Potomac River in Maryland
  • Military vehicle parts that have become habitat to reef-building organisms off Asan in Guam

These areas become even more valuable for wildlife as the oceans are increasingly denuded by commercial fishing, bottom trawling and boat mooring. Shipwrecks and weapons dump sites practically act as protected areas – they are not national parks, but nearly any kind of anthropogenic disturbance is banned, states Vedenin. Consequently a many of species that are usually scarce or declining, such as the Baltic cod, are thriving.

Coming Factors

Wherever armed conflict has happened in the past 100 years, adjacent waters are often containing munitions, states Vedenin. Millions of tons of explosive material rest in our oceans.

The locations of these weapons are insufficiently documented, partly because of international boundaries, secret armed forces records and the reality that records are buried in historical records. They pose an detonation and safety hazard, as well as risk from the persistent emission of hazardous substances.

As Germany and other countries begin removing these artifacts, scientists hope to safeguard the marine communities that have established nearby. In the Lübeck Bay munitions are already being cleared.

It would be wise to replace these iron structures remaining from munitions with certain more secure, various harmless materials, like perhaps concrete structures, says Vedenin.

He now hopes that what happens in the Bay of Lübeck sets a model for replacing material after munitions removal in other locations – because including the most harmful explosives can become framework for new life.

Rachael Hudson
Rachael Hudson

Wildlife biologist with a passion for sloth research and environmental advocacy, sharing insights from field studies in Central America.