Cronkite News: Feeding sea urchins could be one way to restore the West Coast’s vital kelp forests

LOS ANGELES – Considered a delicacy around the globe, sea urchins please the palates of the wealthy, showing up on sushi bars and swirled into pasta at fine restaurants. However, these spiny creatures in recent years have plowed through forests of bull kelp along coasts around the world.

Sea urchins pose a problem to kelp forests, which are an integral part of shoreline ecosystems because they provide food and shelter for fish, shellfish and sea otters. Bull kelp forests in Northern California decreased by more than 90% in 2014 because of warming waters, and they’ve been struggling to recover since then.

What’s to blame? Hungry purple sea urchins, according to Sheila Semans, the executive director at the Noyo Center for Marine Science in Fort Bragg.

“What we understand is this was sort of a perfect storm of events,” said Semans, whose marine protection and restoration group is working to slow the urchins’ population growth and “help the kelp.”

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