World War II Explosives, Torpedoes and Mines: How Marine Life Prosper on Abandoned Armaments
In the slightly salty sea off the German coast rests a graveyard of World War II explosives, torpedoes and mines. Dumped from barges at the conclusion of the World War II and forgotten about, countless weapons have fused into clusters over the decades. 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 years, the wartime weapons was overlooked and forgotten about. A growing number of visitors traveled to the coastal areas and tranquil sea for jetskiing, kite surfing and amusement parks. Below the waves, the munitions decayed.
We initially thought to see a desert, with no life because it was all poisoned, explains the lead researcher.
When the team went looking to see what they were affecting to the ecosystem, some of us anticipated finding a barren area, with no life because it was all contaminated, explains the lead researcher.
What they observed surprised them. Vedenin recalls his scientists shouting with surprise when the submersible first transmitted footage. That moment was a memorable occasion, he says.
Countless of marine animals had settled amid the munitions, creating a regenerated ecosystem richer than the ocean bottom surrounding it.
This marine city was testament to the persistence of marine life. Truly surprising how much life we observe in locations that are supposed to be dangerous and harmful, he explains.
In excess of 40 sea stars had piled on to one exposed chunk of explosive material. They were residing on iron containers, fuse pockets and storage boxes just a short distance from its dangerous content. Fish, crabs, sea anemones and mussels were all observed on the discarded explosives. It resembles a marine reef in terms of the quantity of fauna that was there, states Vedenin.
Surprising Creature Concentration
An average of more than 40,000 organisms were living on every meter squared of the munitions, experts wrote in their study on the finding. The adjacent region was much poorer in life, with only 8,000 creatures on every square metre.
It is paradoxical that objects that are intended to kill all life are hosting so much marine organisms, explains Vedenin. You can see how nature evolves after a catastrophic event such as the World War II and how, in some way, marine life returns to the most dangerous areas.
Artificial Structures as Marine Habitats
Man-made features such as sunken vessels, offshore windfarms, oil rigs and pipelines can create replacements, restoring some of the removed habitat. This research shows that weapons could be comparably advantageous – the explosion of marine organisms on those in the Lübeck Bay is expected to be repeated in other locations.
Between the late 1940s and the post-war period, 1.6m tonnes of munitions were disposed of off the German shoreline. Numerous of people placed them in boats; some were dropped in allocated areas, the remainder just discarded at sea while traveling. This is the initial instance researchers have studied how marine life has responded.
Global Examples of Ocean Adaptation
- In the US, retired energy installations have become marine habitats
- Submerged vessels from the first world war have become homes for wildlife along the Potomac in the state of Maryland
- Tank tracks that have become environment to reef-building organisms off Asan in Guam
These locations become even more crucial for organisms as the marine environments are increasingly denuded by commercial fishing, bottom trawling and boat mooring. Shipwrecks and explosive disposal locations effectively serve as protected areas – they are not national parks, but nearly any kind of anthropogenic disturbance is prohibited, says Vedenin. As a result a many of organisms that are typically uncommon or diminishing, such as the Baltic cod, are prospering.
Future Factors
Wherever armed conflict has happened in the last century, nearby oceans are usually strewn with weapons, states Vedenin. Many millions of tonnes of volatile compounds rest in our oceans.
The locations of these explosives are poorly mapped, partially because of international boundaries, secret military information and the fact that records are hidden in old files. They pose an explosion and security hazard, as well as danger from the continuous release of hazardous substances.
As the German government and different states embark on extracting these remains, scientists aim to protect the marine communities that have established around them. In the Lübeck Bay weapons are already being cleared.
It would be wise to replace these steel remains originating from weapons with some safer, various non-dangerous objects, like perhaps man-made habitats, states Vedenin.
He currently aspires that what happens in Lübeck sets a example for substituting habitats after weapon clearance in different areas – because including the most harmful weaponry can become foundation for marine organisms.