A scientific team led by the Senckenberg Institute in Germany has documented an unexpected habitat: crabs, worms, fish, and anemones thrive on warheads and V-1 flying bombs dropped into the Baltic Sea during World War II.
Instead of finding a toxic and desolate environment, researchers discovered more biodiversity on the explosives than in the surrounding seabed.
“We expected to see less life, but the opposite happened,” noted Andrey Vedenin, author of the study published in Communications Earth and Environment.
War remnants as unprecedented refuges
Hard surfaces and human isolation create an unexpected habitat in contaminated areas.
German waters contain about 1.5 million metric tons of dumped weapons, many with chemical residues and explosives like TNT. However, in the Bay of Lübeck, scientists observed that these structures offer scarce hard surfaces in the Baltic, where the seabed is flat and muddy due to the historical extraction of stones for construction.
Moreover, the presence of pollutants has created a low human activity zone, which paradoxically creates a protection bubble for marine species that manage to adapt to adverse conditions.
Colonization or resilience?
Scientists study whether organisms can reproduce and absorb pollutants.
The next step will be to assess how much of the pollution has been absorbed by the fauna and whether these species can reproduce and establish stable populations.
This type of study reveals how nature transforms human remnants into life opportunities, challenging our ideas about toxicity and ecological recovery.
The Ghost Fleet: warships turned into living ecosystems
In the Potomac River, abandoned vessels transform into artificial reefs and refuges for vulnerable species.
A prominent example of this transformation is the Ghost Fleet of Mallows Bay in Maryland, USA, where hundreds of wooden steamships built during World War I were abandoned and today form a National Marine Sanctuary.
- Wooden remnants: The skeletons of the ships rotted and were colonized by aquatic vegetation
- Artificial reefs: Provide habitats for birds like the osprey and fish like the Atlantic sturgeon, a vulnerable species
- Unique ecosystem: It is one of the largest groups of historic vessels in the Western Hemisphere
- Active conservation: Drone studies and deep mapping help protect this unique ecosystem
Wreck ecology: a new frontier for marine conservation
War remnants can become living laboratories to study resilience, adaptation, and biodiversity.
“It is a testament to the strength of life,” states David Johnston, a marine biologist at Duke University, who has mapped these wrecks as functional habitats.
These findings invite us to rethink the relationship between pollution and biodiversity, and to consider historic wrecks as allies in marine conservation, as long as they are managed with scientific and ethical criteria.
