In Studland Bay on the Dorset coast, the underwater scars left by anchor chains began to heal within just a few years. Where anchors once tore at the roots of seagrass, dense meadows are now green again — and with them come back seahorses, eels and crabs.
It all began in 2021, when a local partnership installed the first ten "eco-moorings". Instead of heavy chains that dragged along the seabed, they used a screw anchor driven into the ground and an elastic line that stretches and contracts with the tide. This mechanism barely touches the seabed.
Research by University of Southampton master's student Kira Dunn showed that in the area of the first ten moorings, bare patches in the seagrass meadows shrank by an average of 94 % between 2021 and 2025. Where conventional chains remained until 2023, recovery stood at 65 %. The data come from sonar surveys and observations by divers.
Seagrass meadows are not just grass under water. They serve as a nursery for fish, a refuge for rare species and a natural filter that stores carbon. When anchors stop destroying them, the grass quickly spreads on its own, and the whole ecosystem returns with it. In Studland Bay there are already noticeably more encounters with seahorses — species that are under special protection in the United Kingdom.
The project is funded through grants, donations and a small fee for using the moorings via a mobile app. By 2026 their number had grown to almost a hundred. The partnership brought together the National Trust, local yacht clubs, scientists and volunteers — all of them see that a simple change of equipment yields a fast and measurable result.
Dorset's experience shows that when the main source of damage can be removed, nature recovers faster than expected. Such local solutions help preserve not only individual species but entire underwater communities on which the health of coastal waters depends.
