Can discarded oyster shells help shape a greener future for S’pore?

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Reefs made of unwanted oyster shells can help fight pollution, improve marine biodiversity, and protect against coastal erosion. The Straits Times finds out how a team of experts is creating one such structure near Changi Sailing Club.

Ms Yukie Yokoyama, 27, an ecologist at Dutch environment and engineering consultancy Witteveen+Bos, and her team created Singapore’s first artificial oyster reef near the jetty of Changi Sailing Club.She said : “Oyster reefs can be created by returning these shells to the ocean.

The oyster reef pilot was supported by the SG Eco Fund, a $50 million push under the Ministry of Sustainability and the Environment that supports environmental sustainability initiatives in the community. It gave the team seed funding to help kick-start the project. The shells were then left to the elements for a month to “suntan”, to ensure that any lingering pathogens were removed, reducing the risk of biohazard exposure.These bags help to support the hard oyster reef structure as it takes shape, and will eventually disintegrate after around five years.

To boost monitoring efforts, citizen scientists will also be recruited to help collect and record data.And the results are already promising. Species such as the spotted scat, purple climber crabs and gobies were found in the vicinity of the reef bags, said Ms Yokoyama.An unidentified crab crawling on recycled oysters which have been repurposed to become a reef on Jan 24.A flower crab seen on the seabed under the dock at Changi Sailing Club.

 

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