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Large zooplankton - Adults, large copepodites, krill, decapods (shrimp )

CLIMATE – Temperature, light, turbulence, advection, mixed layer depth etc. “Strawman” simplified representation of a North Atlantic ocean basin food web. Higher trophic levels. “Detritus”. Small pelagics –Redfish, capelin, herring, myctophids.

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Large zooplankton - Adults, large copepodites, krill, decapods (shrimp )

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  1. CLIMATE – Temperature, light, turbulence, advection, mixed layer depth etc. “Strawman” simplified representation of a North Atlantic ocean basin food web Higher trophic levels “Detritus” Small pelagics –Redfish, capelin, herring, myctophids Large zooplankton - Adults, large copepodites, krill, decapods (shrimp) Micro-zooplankton Small zooplankton - Eggs, nauplii, small copepodites Phytoplankton

  2. “Strawman” simplified representation of a North Atlantic shelf/shallow sea food web dominated by demersal fish “Benthos” – worms, bivalves, molluscs Adult fish - Cod, haddock CLIMATE – Temperature, light, turbulence, advection, mixed layer depth etc. “Detritus” Small pelagics -Capelin, herring, juvenile cod, haddock Large zooplankton - Adults, large copepodites, krill Larval fish - Cod, haddock, sandlance Micro-zooplankton Small zooplankton - Eggs, nauplii, small copepodites Phytoplankton

  3. Summary of major points discussed of Working Group 1B 1) Do some shelf areas have stronger links to basin-scale processes than others (e.g. eastern and western sides of Atlantic)? 2) Temperature is a fundamental driving force: e.g. of species distributions, metabolism etc. 3) There is a need for regional approaches as well as basin-scale, if the true dynamics are to be captured 4) Ocean chemistry is changing - should we put pH on our agenda? 5) How can we predict species distributions? E. g. by examining species envelopes together with experiments? 6) Is using functional groups a way “forward”? Or, should we (continue to) use keystone species, and if so how should we define them? 7) How should we include phytoplankton in our models (e.g. diatoms vs. Phaeocystis)?

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