Files in this Data Supplement:

• Supplemental file 1 - Members, sequence type, source environment, and accession numbers for the 41 major Roseobacter lineages in Fig. 4 (Table S1).
  MS Word document, 496K.
• Supplemental file 2 - Summary of Roseobacter sequence data set quantitative analyses (Table S2).
  MS Word document, 31K.
• Supplemental file 3 - Phylogenetic tree of 1% consensus clusters (Fig. S1).
  Zipped PDF document, 387K.