October 2, 2019 — Maine fishermen face plenty of challenges including proposed whale protection rules, depredation of the state’s softshell clam stock by invasive green crabs, restrictions on seaweed harvesting and rising operating expenses.
It isn’t only the cost of running a fishing operation that’s rising, though.
Two new, recently published studies report that marine ecosystems around the world are experiencing unusually high ocean temperatures more frequently than researchers previously expected. These warming events, including marine heat waves, are disrupting marine ecosystems and the people who depend on them.
Andrew Pershing, chief scientific officer at the Gulf of Maine Research Institute, led the study “Challenges to natural and human communities from surprising ocean temperatures,” published in early August. Working with him on the project were researchers from several Maine-based institutions as well as scientists from laboratories in California and Colorado.
Pershing previously identified the Gulf of Maine as one of the most rapidly warming ecosystems in the global ocean. This time around, Pershing and his colleagues examined 65 large marine ecosystems between 1854 and 2018 to identify the frequency of “surprising” ocean temperatures, which they defined as an annual mean temperature substantially above the mean for the previous three decades.