Coastal volunteers hand-plant million seagrass seeds to restore underwater carbon sinks
In the sheltered bays of the Welsh coastline, hundreds of volunteers in waders and snorkeling gear have joined forces with marine scientists to plant vast underwater meadows of lush green eelgrass (Zostera marina).
Organized by Project Seagrass and Swansea University, the initiative addresses the dramatic historical loss of underwater meadows across the British Isles, where pollution, coastal development, and physical disturbance had erased an estimated ninety percent of native seagrass beds over the past century. Seagrasses are true flowering marine plants that produce rich underwater root systems, anchoring shifting seafloor sands and capturing carbon dioxide up to thirty-five times faster than tropical rainforests.
The restoration process is an inspiring community effort. During low spring tides, volunteer divers hand-collect mature seed pods from surviving donor meadows. Back in community workshops, local residents, school groups, and retirees extract and separate millions of seeds, packing them into biodegradable hessian bags alongside sand. The bags are then carefully laid along barren sandy sea beds, where they dissolve naturally as the seeds sprout and take root.
Underwater monitoring reveals that replanted bays in North Wales and Dale Fort have established dense, emerald-green meadows spanning tens of thousands of square meters. Marine biologists have documented immediate returns of juvenile Atlantic cod, cuttlefish, and two native species of seahorses, establishing a replicable blueprint for ocean rewilding across the globe.
Source: Community-Led Seagrass Restoration and Ocean Carbon Sequestration (Project Seagrass).
Written by the HappyGood desk from the primary source linked above and checked against it. Every story links its source. Corrections: [email protected].
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