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Pradera marina bajo el agua con caballitos de mar entre pastos verdes y un amarre ecológico de tornillo helicoidal con boya
Imagen alusiva a la pradera marina de Studland Bay, en Dorset, y a los amarres ecológicos instalados para protegerla del anclaje tradicional. · Imagen generada EPM

Studland Bay seagrass recovers sharply as eco-moorings prove effective

Seagrass in Studland Bay, Dorset, is recovering dramatically after eco-moorings replaced traditional anchoring: bare patches fell 93.6% between 2021 and 2025…

--- The context --- Studland Bay, off the Dorset coast in England, was designated a Marine Conservation Zone in 2019 and holds one of the United Kingdom's most significant seagrass beds. The beds are vital habitat for protected species including seahorses, pipefish and rays, and nursery grounds for commercially important fish species. --- The facts --- In 2021 the Marine Management Organisation (MMO) introduced a voluntary no anchor zone with the Studland Bay Marine Partnership, leading to the first eco-moorings so boaters could keep using the bay without harming the seagrass. Traditional moorings move across the seabed with wind and tide and can scour sensitive habitats like this one. Eco-moorings are an environmentally friendly Advanced Mooring System: a helical screw drilled into the seabed with an elasticated riser connected to a surface buoy. In 2023 the MMO awarded a £186,000 Fisheries and Seafood Scheme (FaSS) grant toward a larger £248,000 conservation project that added 57 eco-moorings, bringing the total in the bay to 87. Research by Kira Dunn of the University of Southampton analysed five years of monitoring data and tracked recovery across 39 damaged areas, finding every anchor chain scar examined was healing. In the trial area, bare patches shrank by 93.6% between 2021 and 2025, around 57 square metres a year; in a second area, scars fell by 65.4% after the 2023 switch, around 15.9 square metres a year. --- The positions --- Jessica Churchill-Bissett, head of marine conservation at the MMO, said the bay is a case study in supporting coastal communities to deliver proportionate, practical and effective conservation, and that the organisation will keep backing such schemes. David Brown, chair of the partnership steering group and a National Trust lead, said the findings exceeded expectations and that robust monitoring proves how eco-moorings benefit seagrass and its species. --- What remains unknown --- The announcement does not say how long full recovery of all 39 areas will take or whether the model will be extended to other bays. It also leaves open what evidence the Your Coast campaign, through which the MMO is asking coastal communities in England how activities such as anchoring affect marine protected areas, will ultimately gather. --- Unanswered questions --- Will eco-moorings now be extended to other marine conservation zones around the United Kingdom? How long will the deepest anchor scars take to close completely? Will boaters keep respecting the voluntary no anchor zone over the long term? What new evidence will the Your Coast campaign produce on recreational anchoring and protected habitats? --- EPM analysis --- The central fact is not just the percentage but the sequence: recovery began when the disturbance stopped. Where the change came in 2021, bare patches fell by 93.6%; where chains remained until 2023, the improvement was smaller and later, at 65.4%. That timing strengthens the link between the measure adopted and the recovery observed on the seabed over five years of monitoring. 📌 EPM Take: In EPM's view, Studland Bay shows that protecting a fragile habitat does not require closing the bay to the people who use it, but changing the infrastructure that damages it and measuring the result patiently for years. A voluntary zone, 87 eco-moorings and five years of data were enough for every scar examined to be healing. If other coastal communities copy the method with the same monitoring discipline, seagrass recovery could stop being an encouraging exception and become a routine, verifiable practice along the coast.
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