Extended Data Fig. 1: Nitrate + nitrite, phosphate and silicate concentrations along the transect.

White dots represent CTD sampling depths where physiochemical data, pigments, macronutrients and trace metals were collected. Black dots indicate locations where filters were processed for metaproteomic, metatranscriptomic and 18s rRNA analyses. Two black triangles represent depths at which only metatranscriptomic and 18S rRNA information is available (St. 1, 600 m; St. 3, 80 m).