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

In the slightly salty waters off the Germany's coast lies a collection of Nazi bombs, torpedo heads and naval mines. Discarded from boats at the conclusion of the second world war and left behind, thousands weapons have fused into clusters over the decades. They create a decaying blanket on the shallow, silty seafloor of the Bay of Lübeck in the western tip of the Baltic.

Over the decades, the explosive stockpile was overlooked and forgotten about. A growing number of visitors came to the coastal areas and tranquil sea for water sports, kite surfing and amusement parks. Below the waves, the weapons deteriorated.

Some of us thought to see a barren area, with no organisms because it was all contaminated, states a scientist.

When the initial researchers went investigating to see what they were doing to the marine environment, the team anticipated finding a desert, with nothing living there because it was all contaminated, says the lead researcher.

What they discovered amazed them. Vedenin remembers his scientists shouting with surprise when the submersible first relayed pictures. That moment was a great moment, he says.

Numerous of ocean life had settled amid the munitions, creating a regenerated habitat more populous than the seabed around it.

This marine city was testament to the tenacity of life. Truly remarkable how much marine organisms we discover in places that are considered toxic and harmful, he explains.

In excess of 40 starfish had piled on to one accessible chunk of explosive material. They were dwelling on iron containers, detonator compartments and transport cases just centimetres from its dangerous content. Marine fish, crustaceans, sea anemones and bivalves were all found on the discarded explosives. It's similar to a reef ecosystem in terms of the amount of fauna that was present, states Vedenin.

Surprising Population Density

An mean of more than 40,000 creatures were residing on every square metre of the explosives, researchers reported in their research on the finding. The surrounding area was much poorer in life, with only eight thousand creatures on every square metre.

It is surprising that items that are meant to destroy all life are drawing so much life, says Vedenin. It's evident how nature adapts after a major disaster such as the World War II and how, in certain respects, marine life finds its way to the most dangerous places.

Artificial Structures as Marine Habitats

Man-made constructions such as sunken vessels, offshore windfarms, oil rigs and undersea pipes can offer replacements, restoring some of the destroyed marine environment. This investigation shows that explosives could be similarly beneficial – the proliferation of life on those in the Bay of Lübeck is expected to be repeated in other locations.

Between the late 1940s and 1948, 1.6 million tonnes of weapons were discarded off the Germany's coast. Numerous of individuals transported them in boats; a portion were deposited in allocated areas, the remainder just dumped during transport. This is the initial instance researchers have recorded how marine life has reacted.

Worldwide Examples of Marine Adaptation

• In the US, retired oil and gas structures have turned into coral reefs
• Submerged vessels from the World War I have become habitats for creatures along the Potomac in Maryland
• Tank tracks that have become home to reef-building organisms off Asan beach in Guam

These areas become even more valuable for marine life as the oceans are increasingly depleted by fishing, seafloor dredging and anchoring. Shipwrecks and weapons dump sites essentially serve as refuges – they are not official reserves, but almost any kind of anthropogenic disturbance is prohibited, states Vedenin. As a result a many of organisms that are typically uncommon or declining, such as the Baltic cod, are thriving.

Future Factors

Wherever military conflict has occurred in the past 100 years, adjacent waters are usually containing munitions, says Vedenin. Millions of tonnes of dangerous substances rest in our seas.

The sites of these explosives are insufficiently recorded, partially because of sovereign limits, restricted defense data and the fact that archives are hidden in old files. They create an explosion and safety risk, as well as threat from the ongoing emission of hazardous substances.

As Germany and different states start clearing these relics, scientists plan to protect the ecosystems that have formed in their vicinity. In the Lübeck Bay explosives are already being extracted.

Researchers recommend substitute these steel remains left from munitions with some less dangerous, some safe objects, like maybe concrete structures, suggests Vedenin.

He now wishes that what transpires in Lübeck establishes a model for substituting structures after explosive extraction in different areas – because including the most destructive armaments can become framework for ocean ecosystems.