Nazi Bombs, Torpedo Heads and Naval Mines: How Marine Life Thrives on Abandoned Armaments

In the brackish sea off the Germany's shoreline lies a collection of Nazi bombs, torpedoes and mines. Dumped from boats at the conclusion of the second world war and neglected, thousands weapons have fused into clusters over the decades. They create a rusting carpet on the shallow, silty seafloor of the Lübeck Bay in the western part of the Baltic.

Over the decades, the wartime weapons was ignored and forgotten about. A increasing amount of tourists came to the coastal areas and calm waters for jetskiing, kiteboarding and amusement parks. Below the waves, the munitions decayed.

We initially anticipated to see a desert, with nothing living there because it was all toxic, states the lead researcher.

When the initial researchers went looking to see what they were affecting to the marine environment, researchers thought they would find a desert, with no organisms because it was all poisoned, states the lead researcher.

What they found surprised them. Vedenin remembers his team members shouting with surprise when the underwater vehicle first relayed pictures. That moment was a great moment, he recalls.

Numerous of marine animals had settled among the explosives, creating a revitalized habitat more populous than the seabed around it.

This marine city was testament to the resilience of life. Indeed remarkable how much life we discover in areas that are expected to be hazardous and harmful, he says.

More than 40 sea stars had clustered on to one exposed piece of explosive material. They were dwelling on steel casings, ignition chambers and storage boxes just centimetres from its volatile core. Fish, crustaceans, anemones and mussels were all found on the discarded explosives. It resembles a reef ecosystem in terms of the abundance of animal life that was inhabiting the area, says Vedenin.

Surprising Creature Concentration

An average of more than forty thousand animals were residing on every meter squared of the munitions, experts reported in their paper on the observation. The adjacent region was much poorer in life, with only eight thousand organisms on every square metre.

It is paradoxical that things that are designed to eliminate everything are attracting so much marine organisms, states Vedenin. One can observe how the natural world evolves after a catastrophic event such as the World War II and how, in certain respects, marine life finds its way to the most risky places.

Artificial Structures as Marine Habitats

Man-made constructions such as sunken vessels, wind turbines, oil rigs and pipelines can provide alternatives, replacing some of the removed habitat. This study reveals that explosives could be equally advantageous – the bloom of marine organisms on those in the Lübeck Bay is probable to be repeated in different areas.

Between 1946 and the post-war period, 1.6 million tonnes of weapons were dumped off the German coast. Numerous of workers loaded them in barges; a portion were placed in specific areas, the remainder just dumped while traveling. This is the initial instance experts have studied how ocean organisms has adapted.

Global Examples of Ocean Transformation

• In the United States, retired oil and gas structures have become reef ecosystems
• Shipwrecks from the World War I have become habitats for creatures along the Potomac River in the state of Maryland
• Military vehicle parts that have become home to reef-building organisms off Asan in the Pacific island

These areas become even more crucial for marine life as the oceans are increasingly depleted by commercial fishing, bottom trawling and boat mooring. Sunken ships and weapons dump sites effectively act as refuges – they are not official reserves, but nearly any kind of anthropogenic disturbance is banned, explains Vedenin. Consequently a numerous of species that are otherwise scarce or decreasing, such as the cod fish, are prospering.

Future Issues

Anywhere armed conflict has happened in the recent history, nearby oceans are typically strewn with munitions, states Vedenin. Many millions of tons of explosive material rest in our marine environments.

The locations of these weapons are poorly documented, partly because of international boundaries, restricted military information and the reality that records are hidden in historical records. They create an explosion and security risk, as well as risk from the persistent release of poisonous compounds.

As Germany and different states start removing these relics, scientists hope to preserve the ecosystems that have established nearby. In the Bay of Lübeck munitions are already being cleared.

Researchers recommend substitute these iron structures remaining from weapons with some more secure, some safe materials, like perhaps man-made habitats, states Vedenin.

He presently wishes that what occurs in Lübeck sets a example for substituting habitats after weapon clearance in other locations – because including the most damaging weaponry can become foundation for new life.