Figure 2
From: Picocyanobacteria containing a novel pigment gene cluster dominate the brackish water Baltic Sea
Picocyanobacterial phylogeny and distribution. (a) ML phylogeny of six ribosomal proteins found in 126 cyanobacterial genomes and 11 contigs in the 2011 time series assembly. Contig names include the sample id (GS815–GS832), filter fraction (0p1=0.1–0.8 μm, 0p8=0.8–3.0 μm and 3p0=3.0–200 μm) and contig number. Bootstrap support >50% (1000 replicates) are shown at nodes and the scale bar indicates number of expected substitutions per site. The tree was rooted using Gloeobacter violaceus PCC7421 and only the Synechococcus cluster 5 subtree is shown (see the Supplementary material for the full phylogeny). The Prochlorococcus clade has been collapsed. Arrows indicate nodes introduced after phylogenetic placement of sequence reads. The coloured stars indicate pigment type for reference strains (only shown for those studied in Six et al., 2007). See Table 2 for genome abbreviations. (b, c) Distribution of reads from the 2009 transect (b) and 2011 time series (c) in the phylogeny in a. CalCOFI, combined reads from metagenomic samples off the west coast of California (Zeigler Allen et al., 2012).
