Depth zones of the ocean, with the percentage of the global oceans occurring within each zone (estimated from data described in Ref. 17).

aSurface waters to 200m deep were subdivided into 50m strata for global analyses, but into 10m strata for analyses of the Continental Shelf and Mesopelagic Continental Slope.
The letters (A-E) used for each depth zone match those used in Figures 2 and 3. Depth resolution refers to the subdivision of the water column to each depth zone used in subsequent analyses.