World War II Munitions, Torpedo Heads and Mines: How Ocean Creatures Flourishes on Discarded Armaments

In the brackish sea off the Germany's shoreline rests a collection of Nazi bombs, torpedoes and naval mines. Thrown off barges at the conclusion of the World War II and neglected, thousands munitions have become matted together over the years. They create a rusting carpet on the low-depth, silty seafloor of the Bay of Lübeck in the western tip of the Baltic.

Over the decades, the Nazi arsenal was overlooked and forgotten about. A increasing amount of tourists came to the coastal areas and tranquil sea for jetskiing, kiteboarding and entertainment venues. Underwater, the weapons deteriorated.

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

When the team went looking to see what they were affecting to the marine environment, the team thought they would find a lifeless zone, with nothing living there because it was all toxic, states the lead researcher.

What they discovered surprised them. Vedenin recounts his colleagues exclaiming in amazement when the underwater vehicle first transmitted footage. That moment was a remarkable experience, he recalls.

Countless of ocean life had made their homes amid the explosives, creating a regenerated ecosystem richer than the sea floor surrounding it.

This underwater metropolis was evidence to the resilience of life. Truly astonishing how much life we observe in locations that are considered toxic and harmful, he states.

More than 40 starfish had clustered on to one visible chunk of TNT. They were living on steel casings, detonator compartments and transport cases just a short distance from its volatile core. Fish, crabs, anemones and bivalves were all found on the historic weapons. It's similar to a coral reef in terms of the abundance of animal life that was inhabiting the area, notes Vedenin.

Unexpected Population Density

An average of more than forty thousand organisms were dwelling on every square metre of the munitions, scientists wrote in their paper on the observation. The adjacent region was much less diverse, with only eight thousand organisms on every meter squared.

It is paradoxical that items that are intended to kill everything are attracting so much life, explains Vedenin. It's evident how the natural world adapts after a catastrophic event such as the second world war and how, in some way, marine life establishes itself to the most dangerous places.

Artificial Features as Marine Environments

Man-made structures such as shipwrecks, wind turbines, drilling platforms and pipelines can provide alternatives, restoring some of the removed habitat. This investigation demonstrates that explosives could be comparably positive – the proliferation of marine organisms on those in the Lübeck Bay is expected to be found elsewhere.

Between 1946 and the post-war period, 1.6m tons of munitions were discarded off the Germany's coast. Numerous of people loaded them in barges; a portion were deposited in specific locations, the remainder just discarded at sea while traveling. This is the first time experts have documented how ocean organisms has reacted.

Global Instances of Marine Adaptation

• In the US, decommissioned oil and gas structures have transformed into coral reefs
• Submerged vessels from the World War I have become environments for wildlife along the Potomac River in the state of Maryland
• Military vehicle parts that have become habitat to coral off Asan in Guam

These places become even more crucial for marine life as the seas are increasingly denuded by commercial fishing, seafloor dredging and boat mooring. Shipwrecks and munitions areas essentially function as protected areas – they are not national parks, but almost any kind of anthropogenic disturbance is prohibited, states Vedenin. As a result a numerous of organisms that are typically uncommon or declining, such as the cod fish, are thriving.

Coming Factors

Wherever warfare has happened in the past 100 years, adjacent waters are typically littered with explosives, says Vedenin. Millions of tons of volatile compounds rest in our marine environments.

The positions of these weapons are inadequately documented, partly because of international boundaries, classified military information and the situation that records are buried in historic archives. They present an explosion and security danger, as well as risk from the continuous leakage of poisonous compounds.

As the German government and different states embark on extracting these relics, experts plan to safeguard the marine communities that have established nearby. In the Bay of Lübeck explosives are presently being cleared.

It would be wise to replace these metal carcasses left from weapons with certain safer, various non-dangerous objects, like possibly man-made habitats, states Vedenin.

He currently wishes that what happens in the Bay of Lübeck sets a model for replacing habitats after munitions removal elsewhere – because including the most destructive weaponry can become foundation for marine organisms.