Fig. 3.

Differences in relative proportions of taxonomically annotated transcripts between the iron addition and control (Fe-C), control and iron removal (C-DFB), and iron addition and iron removal (Fe-DFB) at each site for (A) diatom reads within the total library (Fe-C, black; C-DFB, white; Fe-DFB, gray) and (B) Pseudo-nitzschia (blue), Chaetoceros (red), and Thalassiosira (green) within the diatom reads. Chaetoceros were a small percentage of the diatom population at P-Low and Fragilariopsis (purple) are shown instead. Plots are grouped by initial iron state (high or low).