Fig. 3.

Shifts in transcript abundance of genes responsive to biogeochemical forcing. The significance of changes in abundance (twofold change, post-p > 0.95 or post-p > 0.99) for genes known to be associated with nitrogen, phosphorus, vitamin, iron, or other trace metal metabolism for diatoms (D) or haptophytes (H) is indicated as blue (decrease) or orange (increase). Genes present within the reference transcriptome but not detected in the field are marked in black, and genes absent from the reference are hatched. KEGG identifications are as follows: urea transporter (K11959), nitrite/ate transporter (K02575), phosphate transporter (K08176), glycerophosphoryl diester phosphodiesterase (K01126), adenosylhomocysteinase (K01251), phosphomethylpyrimidine synthase (K03147), 5-methyltetrahydrofolate–homocysteine methyltransferase (K00548), iron complex transport system (K02013), iron/zinc/copper transport system (K11706), cobalt/nickel transport system (K02006), and zinc transporter (K14715).