Living Coastlines of Oyster Reefs Can Protect Against Coastal Erosion
Because of humans, most of the world’s oyster reefs have disappeared over the last 200 years. Now, some groups around the world are trying to put some of them back. In addition to providing water filtration and habitats for other animals, offshore oyster reefs can help slow long-term erosion by acting as living breakwater structures that partially deflect waves during storm surges.
In the last century, 85% of the world’s oyster reefs have vanished. And we’re only recently beginning to understand what that’s cost us: While they don’t look incredibly appealing from the shore, oysters are vital to bays and waterways around the world. A single oyster can filter up to 50 gallons of water every day. And over time, oysters form incredible reef structures that double as habitats for various species of fish, crabs, and other animals. In their absence, our coastlines have suffered.
Now, several projects from New York to the Gulf of Mexico and Bangladesh are aiming to bring the oysters back. Because not only are oysters vital ecosystems; they can also protect us from the rising oceans by acting as breakwaters, deflecting waves before they hit the shore. It won’t stop the seas from rising — but embracing living shorelines could help protect us from what’s to come.
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This entry originally appeared at kottke.org/21/09/living-coastlines-of-oyster-reefs-can-protect-against-coastal-erosion, and may be a summary or abridged version.