Fig. 4.

Community-wide transcriptional cascades in key metabolic processes are conserved in the coastal and pelagic planktonic microbial communities sampled. Timing on the x-axis is given over a 24-h interval using data aggregated throughout the sampling periods. Photosynthetically Available Radiation profiles averaged over the duration of the ESP drifts (PAR, A) and metabolic transcriptional profiles calculated using harmonic regression in the California coast (B, in blue) and NPSG (B, in orange) planktonic groups are given. Colored dots represent the peak times of transcripts with statistically significant 24-h periodicity, whereas gray dots represent the peak times of transcripts without a significant diel component to their expression. Nighttime periods are indicated with gray shading.