The rich resources of Pacific kelp forests helped humans populate the Americas. Now depleted by as much as 95 percent, they ...

Both areas were mostly ‘urchin barrens’ – sites where sea urchins had overgrazed in the absence of sea otters – when the studies began. But while kelp grew back off both coasts ...

Sea otters have powerful teeth and even more powerful bites – an estimated 615 pounds of force. That’s about as much as a ...

When there aren’t enough otters, sea urchins multiply and eat too much kelp. This destroys kelp forests, turning them into empty underwater areas with little life. But when otters are present, they ...

Sea otters are one of the predators — one of the wolves, to continue the metaphor, to our urchin deer — keeping urchins in ...

While the exact cause of the disease is unknown, scientists say it's had major ripple effects, as sunflower sea stars eat sea ... "Sea urchin populations have boomed on our coast, causing a decline in ...

While the exact cause of the disease is unknown, scientists say it's had major ripple effects, as sunflower sea stars eat ... some kelp forests along B.C.'s coast have been reduced to "urchin ...