Britain's seagrass meadows have suffered decades of decline, but a community-led project on Scotland's west coast is showing that restoring them may not always require starting from seeds.
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restoring → suffer → seeds
Seawilding, a Scottish marine restoration charity, has been experimenting with transplanting mature Zostera marina shoots from healthy donor meadows into areas where seagrass has been lost.
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seagrass → experiment → areas
The approach has produced striking early results at Loch Craignish in Argyll, including a 97% survival rate in a 2025 trial.
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approach → produce → trial
In another restoration plot, seabed coverage increased from 10% to more than 70% within 15 months.
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coverage → increase → months
Together, the trials have created about 0.3 hectares of new seagrass habitat, offering a promising alternative for restoring an ecosystem that supports marine life, stabilises sediments and stores carbon.
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that → create → carbon
Scotland's disappearing seagrass gets a new restoration approach
Seagrasses are flowering marine plants that form underwater meadows in shallow coastal waters.
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that → disappear → waters
Scotland has two native species, Zostera marina and Zostera noltii, with Z. marina, commonly known as eelgrass, occurring widely along the country's coastline.
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marina → have → coastline
These habitats provide nursery and feeding areas for marine organisms, help stabilise sediments and contribute to coastal protection and blue-carbon storage.
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habitats → provide → protection
NatureScot notes that modelled estimates for Britain indicate a general decline of at least 44% in seagrass beds, although it also cautions that historical and Scottish data are incomplete and that the extent of change is difficult to establish precisely.
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extent → note → change
Seawilding began its community-led restoration work in Loch Craignish, Argyll, with earlier efforts concentrating on collecting and planting seagrass seeds.
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efforts → begin → seeds
The organisation says that, over roughly a decade, UK restoration efforts have focused largely on seed-based approaches, but establishing large areas of new meadow has often proved difficult.
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establishing → say → meadow
From 2024, Seawilding began testing a different strategy by taking adult shoots from existing healthy meadows and transplanting them into suitable restoration sites
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Seawilding → begin → sites
Instead of waiting for seeds, the team moved mature plants
The key difference in Seawilding's newer approach is that the restoration team starts with living adult seagrass shoots rather than relying entirely on seeds to germinate and establish new plants.
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team → wait → plants
Tens of thousands of shoots have been transplanted from donor meadows into restoration areas at Loch Craignish.
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thousands → transplant → Craignish
The idea is relatively straightforward: establish living plants immediately in suitable seabed rather than waiting for seeds to germinate, survive their early development and eventually develop into mature plants.
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seeds → establish → plants
NatureScot's Scottish seagrass restoration guidance notes that transplantation has been used elsewhere and can offer advantages where restoration needs to overcome physical problems that make establishment from seed difficult.
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establishment → note → seed
However, transplantation can also require considerably more labour because plants have to be collected and replanted.
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plants → require → labour
The Scottish guidance therefore stresses that restoration success depends on choosing an appropriate technique for the environmental conditions rather than assuming one method will work everywhere.
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method → stress → conditions
Seawilding's project also grew out of several years of experimentation.
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project → grow → experimentation
The organisation says it trialled multiple restoration methods before the adult-shoot approach began producing the results reported in 2025.
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approach → say → 2025
That history is important because the 97% figure did not come from a single attempt that immediately succeeded.
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that → come → attempt
It followed repeated trials to determine how best to collect, transport and establish the plants.
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It → follow → plants
A 2025 trial recorded 97% survival
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trial → record → survival
The strongest result came from a new transplantation trial conducted in 2025.
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result → come → 2025
Seawilding reported that 97% of the transplanted shoots survived, while the trial area also recorded an average fourfold increase in seabed coverage within six months.
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area → report → months
This result is separate from another restoration plot where coverage increased from 10% to more than 70% over 15 months.
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coverage → increase → months
Taken together, the results indicate that transplanted adult plants can establish rapidly under the conditions tested at Loch Craignish.
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plants → take → Craignish
The longer-running plot began receiving transplanted shoots in July 2024.
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plot → run → July
By the following 15 months, the proportion of seabed covered by seagrass had risen from 10% to more than 70%.
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proportion → follow → %
Across the reported restoration work, Seawilding says the intervention has resulted in approximately 0.3 hectares of newly created seagrass habitat.
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intervention → report → habitat
The organisation describes the results as among the most successful establishments of seagrass habitat in the UK to date, although those claims should be understood as project-level results rather than evidence that Britain's seagrass decline has been reversed.
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decline → describe → results
The project also investigated what happened to the original donor meadow after shoots were removed.
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shoots → investigate → meadow
Seawilding reports that harvesting 25% of shoots from a trial area had a limited apparent effect, with shoot density returning to near-natural levels within about five months.
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density → report → months
This is particularly important because a restoration technique would be difficult to scale if collecting plants simply damaged existing healthy meadows.
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collecting → scale → meadows
Local people are helping rebuild the underwater habitat
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people → help → habitat
The Scottish project is notable not only for its restoration technique but also for its community-led structure.
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project → lead → structure
Seawilding describes itself as Scotland's first community-based marine habitat restoration charity, and local volunteers have been involved in monitoring, planting and other stages of the work.
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volunteers → describe → work
The organisation's earlier Loch Craignish project was developed with technical support from Project Seagrass and research and environmental monitoring from the Scottish Association of Marine Sciences.
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project → develop → Sciences
Community participation has also been important for understanding the condition of the existing meadows before restoration begins.
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restoration → understand → meadows
NatureScot's case study describes local residents surveying Loch Craignish using transects and quadrats to record seagrass coverage, while snorkellers and paddleboarders have helped with field observations and seed collection.
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snorkellers → describe → observations
…and 14 more, not listed.
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