World War II Bombs, Torpedo Heads and Naval Mines: How Marine Life Prosper on Discarded Armaments
In the brackish sea off the Germany's coast rests a collection of Nazi bombs, torpedo heads and mines. Dumped from barges at the end of the second world war and left behind, numerous munitions have accumulated over the decades. They form a corroding blanket on the shallow, silty ocean floor of the Bay of Lübeck in the western part of the Baltic Sea.
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 entertainment venues. Below the waves, the weapons decayed.
Researchers thought to see a lifeless zone, with no life because it was all poisoned, says Andrey Vedenin.
When the first scientists went investigating to see what they were doing to the ecosystem, the team expected to see a desert, with no organisms because it was all poisoned, states the lead researcher.
What they discovered astonished them. Vedenin recalls his scientists shouting with surprise when the ROV first sent the images back. This was a remarkable experience, he says.
Numerous of sea creatures had settled amid the munitions, developing a renewed habitat richer than the sea floor surrounding it.
This underwater metropolis was proof to the tenacity of marine life. Truly astonishing how much marine organisms we discover in areas that are considered toxic and risky, he explains.
In excess of 40 sea stars had gathered on to one accessible piece of TNT. They were dwelling on iron containers, ignition chambers and carrying containers just centimetres from its explosive filling. Fish, crabs, anemones and bivalves were all discovered on the historic weapons. You could compare it with a marine reef in terms of the abundance of animal life that was present, notes Vedenin.
Remarkable Population Density
An average of more than forty thousand animals were dwelling on every meter squared of the explosives, experts reported in their paper on the finding. The nearby seabed was much less diverse, with only eight thousand organisms on every meter squared.
It is surprising that items that are designed to destroy all life are attracting so much marine organisms, states Vedenin. It's evident how nature adapts after a major disaster such as the World War II and how, in certain respects, life returns to the most dangerous areas.
Artificial Features as Ocean Habitats
Man-made structures such as shipwrecks, wind turbines, oil rigs and pipelines can offer alternatives, restoring some of the removed habitat. This research reveals that weapons could be comparably beneficial – the bloom of life on those in the Lübeck Bay is expected to be repeated elsewhere.
Between the late 1940s and 1948, 1.6 million tonnes of arms were discarded off the German coast. Thousands of people placed them in vessels; some were deposited in specific areas, others just thrown overboard during transport. This is the initial instance researchers have studied how marine life has adapted.
Worldwide Examples of Marine Transformation
- In the United States, decommissioned drilling platforms have transformed into reef ecosystems
- Shipwrecks from the World War I have become homes for marine life along the Potomac River in the state of Maryland
- Military vehicle parts that have become environment to reef-building organisms off Asan in the Pacific island
These areas become even more valuable for marine life as the marine environments are increasingly stripped by commercial fishing, bottom trawling and anchoring. Shipwrecks and explosive disposal locations practically act as protected areas – they are not national parks, but nearly any kind of human activity is restricted, explains Vedenin. Therefore a lot of species that are otherwise scarce or decreasing, such as the cod fish, are thriving.
Coming Factors
Anywhere military conflict has happened in the recent history, nearby oceans are usually littered with weapons, explains Vedenin. Millions of tons of dangerous substances lie in our seas.
The sites of these munitions are inadequately mapped, in part because of national borders, secret defense data and the situation that records are hidden in historical records. They pose an explosion and security hazard, as well as danger from the ongoing leakage of hazardous substances.
As Germany and additional nations embark on removing these artifacts, scientists aim to protect the habitats that have established around them. In the Bay of Lübeck weapons are already being extracted.
Researchers recommend substitute these metal carcasses originating from munitions with some safer, various harmless objects, like possibly concrete structures, states Vedenin.
He now aspires that what happens in the Bay of Lübeck sets a precedent for replacing habitats after weapon clearance in different areas – because even the most harmful weaponry can become scaffolding for new life.