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A dynamic stochastic food web model for the Barents Sea Benjamin Planque and Ulf Lindstrøm.

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Presentation on theme: "A dynamic stochastic food web model for the Barents Sea Benjamin Planque and Ulf Lindstrøm."— Presentation transcript:

1 A dynamic stochastic food web model for the Barents Sea Benjamin Planque and Ulf Lindstrøm

2 A Dynamic Stochastic Food Web model for the Barents Sea Cop. Euph. Phytopl. Cod Minke whales Capelin A reference ecosystem model Food Web Mass balanced Constraints: physiology & life span Stochastic Simple, fast, transparent Null model to test ecosystem metrics for resilience Fluctuations in the Barents Sea Ecosystem state: are they part of the natural dynamics or are we seeing regime shifts?

3 A Dynamic Stochastic Food Web model for the Barents Sea First results Diet analysis Temporal dynamics Trophic functional relationships

4 A Dynamic Stochastic Food Web model for the Barents Sea First results Alternance of top-down / bottom-up periods? Bottom-up Top-down Bottom-up Top-down

5 A Dynamic Stochastic Food Web model for the Barents Sea Prototype for the Barents Sea Set a reference for expected ecosystem properties under a minimal set of assumptions Can be used as an experimental tool to evaluate resilience of the Barents Sea Ecosystem to climate and fishing perturbations


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