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Vertical profiles of vitamin B12 (pM), Chl a, Prokaryotic abundances (PA) and Prokaryotic heterotrophic production (PHP). Units for B12 and Chl a concentrations, PA and PHP are pmol l−1, μg l−1, ×108 cells l−1 and μg C m−3 h−1, respectively. Note that profiles for stations where only two data points were available are not plotted as vertical profiles.
