Sea urchins feed on a species-rich ecosystem

Sea urchins feed on a species-rich ecosystem

For a long time, brown algae or kelp face every crisis away from the Northern California coast, including major heat waves in the ocean, which are usually calm here. Unusually strong heating in 2014 led to a sudden collapse, eventually destroying 95 percent of the region’s original seaweed and replaced by a type of desert that had a vast population of sea chinins. What is it Biologist Meredith MacPherson from the University of California at Santa Cruz and her team in “Communication Biology” report.

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