Seagrass Restoration: Rebuilding Critical Marine Habitat

Seagrass meadows support enormous biodiversity and provide critical habitat for dugongs, seahorses, sea turtles, and juvenile fish. Their restoration is essential for the welfare of many marine species.

Key Facts

Seagrass meadows have declined by 29% globally since 1879, with accelerating losses since the 1990s
They support over 1 billion people through fishery productivity and coastal protection
Dugongs and manatees depend almost exclusively on seagrass for food — habitat loss directly causes starvation
Seahorses, pipefish, and sea dragons rely on seagrass for shelter, camouflage, and mating sites
Seagrass meadows store up to 18% of oceanic carbon despite covering only 0.1% of the ocean floor
The largest seagrass restoration project replanted over one million shoots in Virginia over 20 years with success
Nutrient pollution and boat propeller scarring are leading causes of localised seagrass loss

Welfare Considerations

Seagrass restoration has direct welfare benefits for species that depend on it. Dugongs starving as their food habitat disappears, seahorses losing the only shelter they can cling to in turbulent water, and juvenile fish deprived of refuge from predators all suffer from seagrass decline. Restoration projects that successfully re-establish seagrass beds have cascading positive effects on the entire associated community. The root causes — nutrient pollution, boat damage, and coastal development — require policy intervention alongside restoration planting to prevent newly established meadows from being lost again.

What You Can Do

Reduce fertiliser use and support nutrient runoff management in coastal watersheds to protect seagrass
Respect boating speed restrictions in seagrass areas and use mooring buoys rather than anchoring
Support seagrass restoration projects through donations or citizen science monitoring
Advocate for coastal development regulations that protect remaining seagrass beds from damage
Choose sustainable seafood from fisheries that do not use destructive trawling methods over seagrass beds