Figure 1.

Advection of euphausiids (red) into the Chukchi Sea and upwelling of copepods (yellow) from the basin to the continental shelf in the Beaufort Sea are prey-delivery pathways that are probably enhanced by increased transport through the Bering Strait and wind-forcing combined with the loss of sea ice. Both enhanced production and increased advection common in the ‘new normal’ Pacific Arctic marine ecosystem deliver food to bowhead whales (inset). This graphic is a composite of revised figures [14,15]; triangles indicate areas where whale-prey associations have been reported [14]. (Online version in colour.)