Britain drops reef cubes and shells to revive native oysters
Engineered concrete cubes are being deployed in Britain's North Sea to restore native oyster populations. These structures provide a stable foundation for oysters and habitat for marine life. The project aims to rebuild a collapsed ecosystem after a significant decline in oyster numbers. Volunteers are actively involved in cleaning and attaching oysters to the reef cubes.
In a conservation effort off the northeast coast of England, Britain has begun dropping reef cubes and shells into the North Sea to revive the dwindling population of native oysters. The 2025 operation involved placing 20 reef cubes, each weighing approximately 6.6 US tons, alongside 4,000 mature oysters, over 35,000 juvenile oysters, and about 44 US tons of repurposed scallop shells.
Native oyster populations in the UK have plummeted by more than 95% since the 19th century, with the loss of these reefs contributing to the overall collapse of marine ecosystems in Europe. The reef cubes, made from a carbon-neutral material called Marine Crete, feature ridges and textured surfaces to provide surfaces for oysters to attach and create habitats for various marine life.
Conservationists hope that this ambitious project will help rebuild a self-sustaining reef ecosystem that can improve water quality and support a diverse range of marine species.
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