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. 2010 Jun 4;5(6):e10960. doi: 10.1371/journal.pone.0010960

Figure 7. Shearwater foraging in the Polar Frontal zone, in relation to oceanographic processes and copepod abundances.

Figure 7

A. Longitudinal distributions in the Polar Frontal zone of water vertical velocity at 1095m depth (solid line, positive = upward) and water depth (dotted). B. Mean summer surface chlorophyll-a from SeaWiFS satellite estimates. C. Near-surface copepod density from continuous plankton recorder surveys (points = individual tow segments, black lines = mean±SE fit by generalised additive model). D. Shearwater relative foraging effort within 3° of latitude of the Polar Frontal zone (white = sooty shearwaters, black = South Australian short-tailed shearwaters, grey = Tasmanian short-tailed shearwaters).