While satellites and offshore buoys can inform scientists about marine heat waves, the effects on ocean species are less understood.
Scientists are pretty good at recognizing marine heat waves: A global network of thousands of oceanic buoys and orbiting satellites allow them to see, in real time, ocean surface temperatures, changing currents and storm systems as they develop, move or stall from the Antarctic to the North Pole.
What’s harder to see is what’s happening to the marine ecosystems below — to the fish, invertebrates, plants and mammals. “There’s sort of a disconnect between temperature and how something like temperature impacts species distribution patterns or how fisheries are operating or how protected species might be responding,” said Jarrod Santora, a fisheries biologist with the National Oceanic and Atmospheric Administration. “There’s a big jump between what we identify as a temperature anomaly and process in the ocean.”Some animals may move down the water column to darker, colder waters.
“So one of the tricky things with heat wave impacts is you have to be lucky and actually have direct observations during the events,” she said. Such direct observations are often made via GPS tags on animals, or observations made from a research vessel that happens to be in the right place at the right time.
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