New Reports Outline Changes in Alaska Marine Ecosystems
New ecosystem reports by NOAA Fisheries cover the impact of climate change on Alaska’s marine ecosystems in the Gulf of Alaska, Bering Sea and Aleutian Islands, including heatwave periods and sustained warm conditions.
NOAA scientists note that the Gulf of Alaska has been in transition since marine heatwave periods that took place from 2014 through 2016 and again in 2019, with some marine populations decreasing and others increasing.
The year 2021 was the second consecutive year without such conditions. Mixed trends were noted in the prey base in the Gulf, with the abundance of zooplankton that provides food for fish, whales and other marine life either below average or average overall. The abundance of forage fish, including herring and age-one Pollock, was higher than in previous ye...