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Figure 1. MONTHLY DENSITY ANOMALIES FOR ALL MARINE BIRDS, MURRES, AND MURRELETS OBSERVED DURING FALL AND WINTER BIRD SURVEYS IN PRINCE WILLIAM SOUND, 2007-2018. A MARINE HEATWAVE EVENT OCCURRED THROUGHOUT THE NORTHEAST PACIFIC OCEAN BEGINNING IN THE WINTER OF 2013/14 AND WAS STRONGEST (WITH REGIONAL VARIABILITY) THROUGH 2017 (INDICATED BY BLACK BOX). HOWEVER, POSITIVE TEMPERATURE ANOMALIES STILL PERSISTED THROUGH 2018 IN THE GULF OF ALASKA, INCLUDING COASTAL REGIONS AND PRINCE WILLIAM SOUND.