The Hidden, Awful Way That Climate Change Imperils Animals

Boom and bust don’t hit much harder than in the Bering Sea. After reaching historically high numbers, the population of snow crabs there cratered by 90 percent following a heat wave in 2018 and 2019. Some 10 billion disappeared. Water temperatures had risen 3 degrees Celsius, but that probably didn’t kill the crabs by overheating them, as you might assume.

“It looks like starvation was likely a key player in the collapse,” says fishery biologist Cody Szuwalski of the National Oceanic and Atmospheric Administration’s Alaska Fishery Science Center, lead author of a recent paper describing the collapse. “There were record numbers of crab, something we’ve never seen before. And it

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