Impact of Artic sea-ice retreat on zooplankton foraging behaviour and vertical carbon flux

Vetically-oriented acoustic devices were moored at c. 200 m in seasonally ice-covered and ice-free fjords at Svalbard (in the Arctic) to observe vertical migration behaviour of zooplankton year-round. We sought to test the null hypothesis that absence of ice, as forecast for a future warmer Arctic, would have no impact on zooplankton behaviour and hence on draw-down of carbon to the ocean.