Seabed damage caused by boat anchors in Studland Bay, Dorset, is showing significant signs of recovery following the introduction of eco-moorings. A new study provides the first scientific evidence that these specialized moorings can effectively restore delicate seagrass meadows, which are vital for carbon storage and biodiversity.
The Studland Bay Marine Partnership initiated the installation of dozens of eco-moorings in 2021 to counteract the degradation of the area’s seagrass. According to research led by Kira Dunn, a recent graduate of the University of Southampton’s MSc program in Marine Biology with Oceanography, bare patches within the seagrass beds decreased by an average of 93.6% between 2021 and 2025. This represents a reduction of approximately 57 square meters per year in the zone where ten trial eco-moorings were placed.
In a contrasting area where traditional chain moorings remained in use until 2023, seagrass scars reduced by 65.4%, or about 15.9 square meters annually. The findings were derived from sonar surveys, historical satellite imagery, and five years of monitoring data across 39 damaged seabed sites.
Studland Bay, designated as a Marine Conservation Zone in 2019, hosts one of the UK’s largest seagrass ecosystems. It serves as a crucial habitat for protected spiny seahorses and short-snouted seahorses. The bay also implemented a voluntary no-anchor zone in 2021 to further protect the underwater environment.
David Brown, chair of the partnership steering group and lead ecologist for the National Trust, described the outcomes as “incredibly exciting.” He noted that the environmental impact exceeded expectations, adding that robust monitoring has now provided the scientific proof needed to demonstrate how eco-moorings benefit seagrass and the species dependent on it.
Dunn, who conducted the research, expressed that the project was “rewarding and positive,” highlighting how encouraging it is to witness the rapid regeneration of such an important habitat when given the chance to recover. Dr. Ken Collins, who supervised the study at the University of Southampton, called Studland Bay a powerful example of how practical conservation measures can reverse habitat damage and deliver measurable environmental improvements.
The Studland Bay Marine Partnership includes a coalition of conservation charities, boating organizations, academics, statutory bodies, community groups, and businesses. Key partners involved in the restoration effort include the Dorset Wildlife Trust, Natural England, the Seahorse Trust, and the University of Southampton.
I’m skeptical. Correlation doesn’t always equal causation. They should compare this against other bays with similar protections.
Great news for the seahorses! Finally, solid proof that practical conservation measures actually work.
Is the reduction really due to the moorings alone, or did the voluntary no-anchor zone play a bigger role here?
Fascinating result! A 93% recovery is much faster than I expected. Hope this model scales up globally.