Transcriptomic versus biogeochemical data.

<p>Panel A: The correlation between diatom microscope counts and log RuBisCO Form ID transcripts counts. Panel B: The inverse relationship of carbonic anhydrase transcript abundance to DIC concentration. Panel C: The inverse relationship between polyphosphate kinase transcript abundance and phosphate concentration. Station 2 and 25 had little or no phosphate, due to the diatom bloom, however <i>ppk</i> was not upregulated.</p

Metadata for stations sampled in the ARP.

<p>Measurements taken in conjunction with the metatranscriptomes are listed here. Asterisks highlight where concentration of the variable was below limit of detection.</p

Sample size-normalized gene counts for the 31 biogeochemically-relevant genes.

<p>Values are the average of the duplicate samples, per 10 million sequences. Bolded/underlined numbers highlight the highest expression for that gene.</p

Salinity map of the May/June 2010 Amazon River Plume cruise aboard the RV Knorr.

<p>Salinity (PSU) from the underway system along the ship track was augmented with National Oceanographic Data Center profiles in regions of low coverage then interpolated and contoured.</p

Ratios of transcript abundance at stations 10:2 (black bars) and 25:2 (white bars).

<p>Station 10 has very high levels of eukaryotic nitrate transporter as well as chitin synthase compared to station 2. Note log scale. Stations 2 and 25 perform similar functions in the ARP. Thus the plot of the ratio of Station 25: Station 2 has smaller values than the ratio of stations 10 and 2.</p