Skip to main content Skip to secondary navigation
Main content start

A Sea Urchin Army Is Mowing Down California's Kelp Forests -- But Why?

Kelp forests are the marine mirror images to the towering redwoods onshore, the scaffolding that supports the image of the classic northern California coastline.

Sea Urchin

Kelp forests are the marine mirror images to the towering redwoods onshore, the scaffolding that supports the image of the classic northern California coastline.

But these oceanic forests are currently under siege from a potent mix of climate anomalies, disease, and predation that have led to declines in kelp forests not seen in decades.

In their place, vast "urchin barrens" of bare rock picked clean by roving grazers. These sunken equivalents of forest clear-cuts gut the complex relationships that sustain a healthy ecosystem.

Explore More