Nazi Bombs, Torpedoes and Naval Mines: The Way Marine Life Flourishes on Dumped Armaments
In the brackish sea off the German coast sits a collection of Nazi bombs, torpedoes and mines. Discarded from barges at the conclusion of the World War II and left behind, countless weapons have become matted together over the years. They comprise a decaying blanket on the shallow, silty ocean floor of the Bay of Lübeck in the western part of the Baltic Sea.
Over the decades, the explosive stockpile was overlooked and forgotten about. A increasing amount of tourists traveled to the sandy beaches and calm waters for jetskiing, kite surfing and amusement parks. Beneath the surface, the munitions decayed.
Researchers thought to see a lifeless zone, with no organisms because it was all poisoned, says a scientist.
When the first scientists went looking to see what they were affecting to the marine environment, some of us expected to see a lifeless zone, with nothing living there because it was all contaminated, states a scientist.
What they discovered astonished them. Vedenin recalls his scientists exclaiming in amazement when the ROV first transmitted footage. It was a great moment, he says.
Thousands of marine animals had made their homes on the munitions, forming a revitalized marine community richer than the ocean bottom nearby.
This underwater metropolis was testament to the persistence of life. Indeed astonishing how much marine organisms we find in places that are expected to be toxic and dangerous, he says.
More than 40 sea stars had piled on to one visible fragment of explosive material. They were residing on steel casings, fuse pockets and carrying containers just centimetres from its dangerous content. Fish, crustaceans, anemones and bivalves were all observed on the historic weapons. You could compare it with a reef ecosystem in terms of the abundance of creatures that was inhabiting the area, notes Vedenin.
Surprising Population Density
An average of more than 40,000 organisms were dwelling on every meter squared of the weapons, experts wrote in their paper on the discovery. The adjacent region was much poorer in life, with only 8,000 creatures on every meter squared.
It is paradoxical that objects that are meant to destroy everything are attracting so much marine organisms, states Vedenin. You can see how the natural world adjusts after a major disaster such as the second world war and how, in certain respects, marine life finds its way to the most dangerous places.
Man-made Features as Ocean Environments
Artificial constructions such as shipwrecks, offshore windfarms, oil rigs and pipelines can create alternatives, restoring some of the destroyed habitat. This research demonstrates that munitions could be similarly beneficial – the proliferation of marine organisms on those in the Bay of Lübeck is probable to be found in other locations.
Between 1946 and the post-war period, 1.6 million tons of weapons were discarded off the German shoreline. Countless of individuals loaded them in boats; some were dropped in specific areas, the remainder just dumped en route. This is the first time researchers have studied how marine life has reacted.
Worldwide Examples of Marine Adaptation
- In the US, retired energy installations have become coral reefs
- Submerged vessels from the first world war have become environments for creatures along the Potomac in Maryland
- Tank tracks that have become home to reef-building organisms off Asan in the Pacific island
These places become even more valuable for marine life as the seas are increasingly depleted by commercial fishing, seafloor dredging and boat mooring. Sunken ships and explosive disposal locations practically act as protected areas – they are not official reserves, but virtually any kind of anthropogenic disturbance is banned, states Vedenin. Therefore a numerous of marine species that are typically scarce or declining, such as the Baltic cod, are thriving.
Coming Factors
Anywhere warfare has taken place in the last century, adjacent waters are usually containing munitions, states Vedenin. Millions of tonnes of volatile compounds rest in our oceans.
The locations of these weapons are insufficiently recorded, partially because of international boundaries, classified military information and the reality that archives are stored in historical records. They pose an detonation and security danger, as well as danger from the persistent release of hazardous substances.
As the German government and different states start extracting these artifacts, scientists plan to preserve the ecosystems that have developed in their vicinity. In the Bay of Lübeck explosives are currently being removed.
We should replace these iron structures left from munitions with some more secure, various harmless structures, like possibly artificial reefs, states Vedenin.
He currently hopes that what happens in Lübeck creates a example for replacing material after weapon clearance elsewhere – because even the most harmful armaments can become framework for new life.