Figure 1. Broad phylogeny of Arctic and Antarctic algae.

Consensus ML topology of a 391 taxa × 39,504 amino acid alignment based on 250 conserved single-copy nuclear genes from available microalgal genomes and MMETSP transcriptomes. Eight algal groups (cryptomonads, chlorophytes, chrysophytes, dictyochophytes, diatoms, dinoflagellates, haptophytes, and pelagophytes) with at least one Arctic representative are included. Branch colour corresponds to the phylogeny and text colour the isolation site of each genome or transcriptome considered. Sequenced Arctic and Antarctic algal strains and taxonomically representative taxa for each algal group are labelled. Genome libraries sequenced in this study are indicted with blue asterisks.