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Bering Sea Important: Large Ecosystem, Pollock $2 B, 40 % of US catch Considerable data sources: Annual surveys and research First-order Knowledge Base:

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Presentation on theme: "Bering Sea Important: Large Ecosystem, Pollock $2 B, 40 % of US catch Considerable data sources: Annual surveys and research First-order Knowledge Base:"— Presentation transcript:

1 Bering Sea Important: Large Ecosystem, Pollock $2 B, 40 % of US catch Considerable data sources: Annual surveys and research First-order Knowledge Base: reviews and special issues Considerable management and support activities Not generally overfished: Dynamic ecosystem and climate change

2 Climate Patterns 1977-1988 (PNA+/PDO ) 1989-1995 (AO+) 2000-2005 (Arctic Warm) Pacific North American Arctic Oscillation Overland and Wang (2005) 2006 Surface Air Temperature Anomalies

3 Time lags

4 Hunt et al. (2002) Oscillating Control Hypothesis

5 Bering Indicators

6 Multivariate look at indicators

7 Dendogram of Bering Sea stocks based on hierarchical cluster analysis of pairwise Manhatten distances among standardized recruitment From Franz Mueter & Bern Megrey

8 Charge to Workshop While understanding the limits from complexity, the ongoing efforts by NMFS and others, and the need for comprehensive reviews (300+ pages), How do we summarized the state of the Bering Sea that will provide sensitive indicators (<10) of change?

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