Concrete oyster reefs boosted biomass 45-fold within 2 years, study finds
Researchers in Prince Edward Island successfully used concrete blocks to create artificial oyster reefs in bare seabed areas. Within two years, these structures significantly increased local marine biomass and biodiversity by providing essential hard surfaces for colonization.
Why it matters
This study demonstrates a low-cost, effective method for habitat restoration in coastal areas where natural seagrass meadows have been fragmented or lost.
What started as piles of concrete blocks on the seafloor off Prince Edward Island soon became a magnet for marine life. Researchers began installing the artificial oyster reefs in 2021 to test whether they could provide some of the ecological functions lost from areas where eelgrass no longer grew. Within two years, the structures had been colonised by 45 taxa, while biomass was about 45 times higher on two-year-old reefs than on newly installed ones. The findings, published in Ecosphere, show how a simple structure can provide a new foothold for marine life in a fragmented coastal habitat.Turning bare seabed into new habitatThe work took place on the eastern end of Lennox Island, Prince Edward Island, where eelgrass (Zostera marina) meadows are broken up by patches of bare sediment. Instead of trying to plant eelgrass directly into those empty areas, researchers tested another idea.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in