A Pacific cod is seen swimming near the ocean floor in Alaska waters in this undated photo. A collapse of Gulf of Alaska cod stocks that forced harvest closures in recent years is blamed on marine heatwave conditions, and those have been linked to human-caused climate change.
While those surveys represent “world-class” and “robust” data gathering, they will be increasingly difficult to do, said Bob Foy, the center’s “The last two heat waves are why we’re here talking about it. Climate change, slow, has been going on a long time,” Foy said. “It’s the extreme nature of climate change, it’s the next heat wave, which is coming, that we have to be prepared for.”
“We shouldn’t expect to be able to be able to predict exactly what the ecosystem will do, but we should expect that the ecosystem will respond. And I think that’s the uncomfortable part.” “It’s clear evidence that this is a human caused event that’s affecting our fisheries. And that unprecedented warming had really rapid and fairly catastrophic consequences to the ecosystem that are fairly familiar to the people in the room,” he said. He listed ever recorded, which was among murres – and die-offs of large whales as some of the effects of the heatwave that became known as “
Research so far shows that heat in the Bering Sea pushed the crab into smaller areas while increasing their need for food, resulting in mass starvation deaths, Fedowa said. “This was essentially a large-scale mortality event that was driven by climate,” she said. on cold conditions and the presence of sea ice, she noted. “So the assumption or the expectation is that as we continue to lose these Arctic conditions in the eastern Bering Sea, that snow crab productivity will also decline.
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