Fig. 1.

(A) Comparison of the metal:P stoichiometry of the whole cell metal quota of Pseudoalteromonas sp. (BB2-AT2) with several strains of phytoplankton, characterized by Ho et al. (Ni:P data were unavailable for comparison).⁴⁴ (B) Comparison of the M:P stoichiometry of BB2-AT2 with the M:P stoichiometries derived from the regression of dissolved metal concentrations in the upper water column against dissolved macronutrient concentrations obtained in the North Atlantic, North Pacific, and Southern Oceans by Twining and Baines (Mn:P data were unavailable for comparison).⁴⁸