World War II Bombs, Torpedo Heads and Mines: The Way Marine Life Flourishes on Discarded Armaments
In the brackish waters off the German shoreline sits a graveyard of Nazi bombs, torpedo heads and naval mines. Discarded from boats at the end of the second world war and left behind, thousands explosives have accumulated over the years. They comprise a rusting blanket on the shallow, muddy ocean floor of the Bay of Lübeck in the western part of the Baltic Sea.
Over the decades, the wartime weapons was ignored and neglected. A growing number of visitors traveled to the sandy beaches and tranquil sea for jetskiing, kite surfing and amusement parks. Beneath the surface, the weapons decayed.
We initially thought to see a desert, with nothing living there because it was all poisoned, says the lead researcher.
When the first scientists went searching to see what they were affecting to the marine environment, some of us expected to see a lifeless zone, with no organisms because it was all toxic, says the lead researcher.
What they observed amazed them. Vedenin recounts his scientists exclaiming in amazement when the underwater vehicle first transmitted footage. That moment was a memorable occasion, he recalls.
Numerous of sea creatures had made their homes amid the weapons, forming a revitalized marine community denser than the seabed surrounding it.
This marine city was proof to the persistence of life. It is actually astonishing how much marine organisms we observe in locations that are considered hazardous and risky, he states.
Over 40 sea stars had gathered on to one visible piece of explosive material. They were dwelling on metal shells, ignition chambers and storage boxes just a short distance from its dangerous content. Marine fish, crustaceans, anemones and mussels were all discovered on the historic weapons. It resembles a coral reef in terms of the quantity of animal life that was inhabiting the area, notes Vedenin.
Remarkable Creature Concentration
An mean of more than 40,000 creatures were living on every meter squared of the explosives, researchers documented in their research on the observation. The nearby seabed was much sparser, with only eight thousand organisms on every square metre.
It is ironic that items that are intended to kill everything are drawing so much marine organisms, says Vedenin. One can observe how the natural world adapts after a catastrophic event such as the World War II and how, in some way, life returns to the most hazardous locations.
Man-made Structures as Ocean Environments
Artificial structures such as shipwrecks, wind turbines, drilling platforms and undersea pipes can offer substitutes, replacing some of the lost habitat. This investigation shows that munitions could be equally beneficial – the bloom of life on those in the Bay of Lübeck is expected to be repeated in other locations.
Between 1946 and 1948, 1.6 million tonnes of munitions were disposed of off the Germany's coast. Numerous of individuals loaded them in vessels; some were deposited in designated sites, the remainder just dumped while traveling. This is the initial instance scientists have documented how ocean organisms has responded.
Worldwide Instances of Marine Transformation
- In the US, retired oil and gas structures have turned into reef ecosystems
- Sunken ships from the first world war have become homes for marine life along the Potomac River in the state of Maryland
- Tank tracks that have become home to reef-building organisms off Asan beach in Guam
These places become even more important for wildlife as the marine environments are increasingly depleted by fishing, seafloor dredging and anchoring. Sunken ships and explosive disposal locations essentially serve as refuges – they are not official reserves, but virtually any kind of human activity is banned, states Vedenin. Consequently a many of organisms that are otherwise uncommon or decreasing, such as the cod fish, are flourishing.
Future Issues
Anywhere military conflict has occurred in the recent history, surrounding seas are often littered with explosives, explains Vedenin. Many millions of tonnes of explosive material lie in our seas.
The locations of these munitions are inadequately recorded, partially because of international boundaries, secret defense data and the fact that records are hidden in historical records. They create an explosion and safety risk, as well as danger from the persistent release of hazardous substances.
As Germany and additional nations embark on removing these remains, scientists plan to preserve the ecosystems that have formed in their vicinity. In the Lübeck Bay explosives are currently being cleared.
It would be wise to substitute these iron structures originating from munitions with some less dangerous, various harmless objects, like maybe man-made habitats, suggests Vedenin.
He now aspires that what occurs in Lübeck creates a model for replacing habitats after munitions removal elsewhere – because even the most harmful explosives can become scaffolding for marine organisms.