More than a century of preserved fish specimens offer a rare glimpse into long-term trends in parasite populations. New research from the University of Washington shows that fish parasites plummeted from 1880 to 2019, a 140-year stretch when Puget Sound — their habitat and the second largest estuary in the mainland U.S. — warmed significantly. The study, published the week of Jan.
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A warming climate is causing a decline in sea ice in the Arctic Ocean, where loss of sea ice has important ecological, economic and climate impacts. On top of this long-term shift due to climate change are weather events that affect the sea ice from week to week. The strongest Arctic cyclone ever observed poleward of 70 degrees north latitude struck in January 2022 northeast of Greenland.
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The deep sea contains more than 90% of the water in our oceans, but only about a third of all fish species. Scientists have long thought the explanation for this was intuitive — shallow ocean waters are warm and full of resources, making them a prime location for new species to evolve and thrive. But a new University of Washington study led by Elizabeth Miller reports that throughout Earth’s ancient history, there were several periods of time when many fish actually favored the cold, dark, barren waters of the deep sea.
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Most things that humans build need a little maintenance every now and again. That’s no different for the Regional Cabled Array, a high-tech engineering marvel off the Pacific Northwest coast studded with all kinds of oceanographic equipment that gives humans a real-time, 24/7 look at what’s happening under the sea surface. The lengths that scientists and engineers go to keep the array working and up to snuff is extraordinary, and they are currently at sea providing its annual check-up.
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Around 50 years ago, Pacific oysters in the Puget Sound started dying at noticeably increasing rates during the summer, causing residents and scientists to wonder why. Researchers in what is now the School of Aquatic and Fishery Sciences investigated many factors that may cause mortalities such as bacteria, reproductive stress related to spawning and changes in other environmental conditions. The evidence collected pointed towards stress on the animals when they spawn, as the Pacific oyster spends a lot of their energy on reproduction.
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