Nazi Explosives, Torpedo Heads and Mines: How Ocean Creatures Flourishes on Abandoned Weapons
In the brackish waters off the German shoreline rests a collection of World War II explosives, torpedoes and naval mines. Dumped from vessels at the end of the second world war and left behind, thousands explosives have fused into clusters over the years. They comprise a rusting blanket on the low-depth, muddy ocean floor of the Bay of Lübeck in the western part of the Baltic.
Over the years, the explosive stockpile was overlooked and neglected. A growing number of tourists traveled to the coastal areas and calm waters for water sports, kiteboarding and entertainment venues. Below the waves, the munitions decayed.
Some of us thought to see a desert, with no life because it was all contaminated, states a scientist.
When the initial researchers went investigating to see what they were affecting to the ecosystem, some of us expected to see a barren area, with no life because it was all contaminated, states a scientist.
What they observed astonished them. Vedenin remembers his scientists exclaiming in amazement when the ROV first transmitted footage. This was a memorable occasion, he says.
Thousands of sea creatures had settled among the munitions, creating a regenerated marine community more populous than the seabed nearby.
This ocean community was evidence to the persistence of marine life. Indeed surprising how much marine organisms we observe in locations that are supposed to be toxic and risky, he says.
More than 40 sea stars had piled on to one accessible fragment of TNT. They were living on steel casings, ignition chambers and carrying containers just centimetres from its explosive filling. Fish, crustaceans, sea anemones and mussels were all found on the historic weapons. It resembles a coral reef in terms of the amount of creatures that was present, says Vedenin.
Unexpected Creature Concentration
An average of more than 40,000 organisms were residing on every meter squared of the weapons, experts reported in their paper on the observation. The surrounding area was much sparser, with only eight thousand individuals on every square metre.
It is ironic that items that are designed to eliminate everything are hosting so much marine organisms, explains Vedenin. One can observe how nature adjusts after a catastrophic event such as the second world war and how, in some way, marine life returns to the most dangerous areas.
Artificial Structures as Ocean Habitats
Artificial structures such as shipwrecks, offshore windfarms, oil rigs and pipelines can create replacements, compensating for some of the lost marine environment. This investigation demonstrates that explosives could be comparably beneficial – the explosion of marine organisms on those in the Lübeck Bay is expected to be duplicated in different areas.
Between the late 1940s and the post-war period, 1.6m tons of munitions were dumped off the German coast. Thousands of people loaded them in vessels; a portion were placed in allocated areas, the remainder just thrown overboard en route. This is the initial instance experts have recorded how ocean organisms has responded.
Worldwide Examples of Ocean Transformation
- In the US, retired energy installations have transformed into reef ecosystems
- Submerged vessels from the first world war have become habitats for wildlife along the Potomac in the state of Maryland
- Tank tracks that have become environment to reef-building organisms off Asan beach in Guam
These places become even more crucial for organisms as the oceans are increasingly depleted by commercial fishing, seafloor dredging and anchoring. Shipwrecks and explosive disposal locations effectively act as sanctuaries – they are not national parks, but nearly any kind of anthropogenic disturbance is restricted, says Vedenin. Therefore a lot of organisms that are typically scarce or decreasing, such as the Baltic cod, are flourishing.
Coming Factors
Anywhere military conflict has taken place in the recent history, adjacent waters are often strewn with munitions, explains Vedenin. Millions of tonnes of dangerous substances rest in our marine environments.
The locations of these munitions are insufficiently recorded, partially because of national borders, secret defense data and the fact that documents are buried in historical records. They present an detonation and security hazard, as well as risk from the continuous leakage of toxic chemicals.
As the German government and additional nations embark on extracting these artifacts, researchers hope to preserve the ecosystems that have developed nearby. In the Bay of Lübeck explosives are presently being extracted.
We should substitute these iron structures originating from munitions with some less dangerous, some harmless materials, like perhaps man-made habitats, suggests Vedenin.
He now wishes that what happens in the Bay of Lübeck sets a precedent for substituting habitats after weapon clearance elsewhere – because including the most destructive armaments can become scaffolding for marine organisms.