FIG 5.

Phylogeny of the genomes belonging to the phylum Thaumarchaeota in the Caspian Sea and their metagenomic recruitment across aquatic data sets. (A) Maximum likelihood phylogeny obtained using a concatenation of 164 conserved proteins of Caspian Sea genomes in the phylum Thaumarchaeota and related genomes. Sequences from the Euryarchaeota were used to root the tree. The Caspian Sea groups are highlighted in red. Bootstrap values (in percent) are indicated at each node. (B) Metagenomic recruitment of Caspian Sea thaumarchaeal genomes and related reference genomes against different data sets. The data sets used are described in Fig. 1. The genomes of organisms from various habitats are shown. The salinity of the samples is indicated in parentheses. An asterisk next to a Caspian Sea genome indicates a small genome (<500 kb) that could be classified only as belonging to the thaumarchaea and no further.