2-minute read

Just when we thought sea otters couldn’t possibly be more lovable, researchers at Sonoma State University have discovered that the bewhiskered marine mammals, aka kelp keepers, are also helping to save Monterey Bay’s coastal salt marsh, the Elkhorn Slough—one tasty crab dinner at a time.

The Elkhorn Slough, a seven-mile stretch between Santa Cruz and Monterey, is home to an amazing variety of wildlife, including 340 bird species, 550 invertebrates, and 60 mammals. Salt marshes like the Slough are among the most threatened ecosystems on Earth. And why is saving salt marshes important? Well, they are invaluable ecosystems that help protect shorelines, store carbon, and promote healthy fisheries, in addition to supporting thousands of species of plant and animal life.

According to the Sonoma State researchers, striped shore crabs, left unchecked by natural predators, have been disrupting the soil and eating the roots of marsh plants that hold the shoreline of the Slough together, contributing to almost a foot of erosion every year.

Enter the hungry, hungry sea otters, enthusiastic consumers of the burrowing crustaceans. In areas of the salt marsh where the once plentiful native otters were reintroduced, erosion was reduced by 2/3, helping to maintain this critical habitat for all wildlife.

By protecting the sea otters that keep runaway grazers like striped crabs from disrupting coastlines, we can reduce erosion, protect marine habitat that supports native wildlife and help cool the planet—that’s a conservation triple win—otterly amazing!

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