Files in this Data Supplement:

• Supplemental file 1 - Rarefaction curves determined for the different RFLP patterns of the SSU rRNA gene, SSU rRNA, nosZ, and amoA clones from total, 3B02, 2B1820, 3G02, and 3G1820 samples (Fig. S1); relative abundance of individual phylotypes across sediment depth, site, and time based on SSU rRNA gene amplification (Fig. S2) and based on nosZ amplification (Fig. S3).
  Zipped PDf file, 2.6MB.
• Supplemental file 2 - Legends to Fig. S1 to S3.
  MS Word document, 25K.
• Supplemental file 3 - Summary of amoA (Table S1), SSU rRNA (Table S2), and nosZ (Table S4) gene sequences and of SSU rRNA (RNA-derived sequences (Table S3) from 3B02, 3B1820, 3G02, and 3G1820 clone libraries.
  Zipped MS Word document, 25K.