Review of global zooplankton biomass in the bathypelagic zone

We reviewed 274 profiles of zooplankton biomass smaller than 5 mm when this information was available but always excluding macrozooplankton and micronekton. Due to the different mesh sizes (200, 300 or 500 µm) used by the different authors in our review, the obtained values are in some cases an underestimation of mesozooplankton biomass for the smaller size classes. Data not available in Tables were obtained from data points of figures using GraphClick software v3.0. This data is marked with an asterisk in the Supplementary Table 5 of Hernández-León et al. (submitted). Biomass in different units were converted to carbon using different published conversion factors (Cushing et al., 1958). Values from different depth layers were centred at the mean depth, averaged in each profile, and expressed as standing stock below one square meter.