Kelp Forests And Invasive Urchins

Purple sea urchins have boomed off Northern California, destroying kelp forests that provide a crucial ecosystem. Steve Lonhart / NOAA MBNMS

Kelp is being farmed now, but where it is a naturally occurring forest it needs help. Thanks to National Public Radio (USA) for this:

In Hotter Climate, ‘Zombie’ Urchins Are Winning And Kelp Forests Are Losing

They’re purple, spiky and voracious, and just off the West Coast, there are more of them than you can count.

Purple sea urchins have exploded in recent years off California, covering the ocean floor in what divers describe as a “purple carpet.” Continue reading