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

In the brackish sea off the Germany's shoreline rests a collection of Nazi bombs, torpedoes and naval mines. Discarded from barges at the conclusion of the World War II and left behind, thousands explosives have accumulated over the decades. They comprise a decaying blanket on the low-depth, muddy seafloor of the Bay of Lübeck in the western tip of the Baltic Sea.

Over the years, the explosive stockpile was ignored and neglected. A increasing amount of tourists traveled to the coastal areas and calm waters for water sports, kiteboarding and amusement parks. Beneath the surface, the weapons eroded.

We initially anticipated to see a barren area, with no organisms because it was all contaminated, explains the lead researcher.

When the team went looking to see what they were doing to the ecosystem, the team anticipated finding a barren area, with nothing living there because it was all toxic, explains the lead researcher.

What they observed amazed them. Vedenin recounts his scientists shouting with surprise when the underwater vehicle first transmitted footage. That moment was a remarkable experience, he recalls.

Countless of sea creatures had made their homes on the munitions, creating a renewed marine community denser than the ocean bottom nearby.

This underwater metropolis was evidence to the resilience of marine life. It is actually surprising how much life we observe in locations that are expected to be toxic and harmful, he states.

Over 40 starfish had gathered on to one exposed fragment of explosive material. They were residing on iron containers, fuse pockets and storage boxes just centimetres from its volatile core. Marine fish, crustaceans, anemones and bivalves were all discovered on the discarded explosives. It resembles a coral reef in terms of the amount of creatures that was there, says Vedenin.

Unexpected Creature Concentration

An average of more than 40,000 organisms were residing on every square metre of the explosives, experts documented in their paper on the discovery. The surrounding area was much sparser, with only eight thousand creatures on every square metre.

It is ironic that items that are designed to eliminate all life are attracting so much life, explains Vedenin. You can see how the natural world evolves after a catastrophic event such as the second world war and how, in some way, marine life returns to the most dangerous locations.

Man-made Structures as Ocean Habitats

Artificial features such as shipwrecks, wind turbines, oil rigs and undersea pipes can offer replacements, replacing some of the removed marine environment. This investigation shows that explosives could be equally positive – the proliferation of life on those in the Lübeck Bay is likely to be repeated in other locations.

Between the late 1940s and 1948, 1.6m tons of munitions were dumped off the Germany's coast. Numerous of workers loaded them in vessels; some were placed in designated locations, the remainder just thrown overboard while traveling. This is the first time scientists have recorded how marine life has responded.

Global Examples of Ocean Transformation

  • In the US, retired energy installations have become reef ecosystems
  • Submerged vessels from the first world war have become homes for creatures along the Potomac in Maryland
  • Tank tracks that have become home to reef-building organisms off Asan in the Pacific island

These locations become even more crucial for organisms as the seas are increasingly denuded by commercial fishing, bottom trawling and boat mooring. Sunken ships and explosive disposal locations effectively act as protected areas – they are not official reserves, but almost any kind of human activity is restricted, explains Vedenin. As a result a lot of marine species that are usually scarce or diminishing, such as the cod fish, are thriving.

Coming Issues

Anywhere warfare has taken place in the past 100 years, adjacent waters are usually containing explosives, explains Vedenin. Many millions of tons of explosive material lie in our marine environments.

The positions of these munitions are insufficiently mapped, partly because of sovereign limits, classified military information and the situation that archives are hidden in old files. They present an detonation and security risk, as well as threat from the persistent leakage of poisonous compounds.

As the German government and additional nations begin clearing these artifacts, scientists aim to protect the marine communities that have formed nearby. In the Bay of Lübeck explosives are already being removed.

We should substitute these metal carcasses remaining from weapons with some less dangerous, some non-dangerous materials, like possibly artificial reefs, states Vedenin.

He now wishes that what occurs in Lübeck sets a example for substituting habitats after explosive extraction elsewhere – because even the most destructive armaments can become foundation for new life.

Kevin Johnson
Kevin Johnson

A software developer and gaming enthusiast passionate about exploring emerging technologies and sharing hands-on project experiences.