Is the Climate of the Bering Sea Warming and Affecting the Ecosystem? S.Oishi 2004EO330001 April 14, 2006 The Bering Sea • Observations from the Bering Sea are good indicators of decadal shifts in climate. • Bering Sea is experiencing a northward biogeographical shift. • 47% of the U.S. fishery production by weight, • 80% of the U.S. sea bird population, 95% of northern fur seals,and major populations of Steller sea lions,walrus, and whales. Depth Averaged Temperature Temperature Anomaly 1976 Ice Coverage 1976 Greenland Turbat 18% of 1977 Not decreasing total amount, but northward shift Pollock catch per unit effort (t/ha) Left 1997 small amount , right 2003 large amount Pollock is r-select species which are rapid colonization. K-select species are long term stability Summary • Bering Sea indicators should be watched closely over the next 5 years
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