Abundances of environmental phenotypes within the clusters.

The table presents abundances of specific environmental phenotypes. It is hard to infer adaptation to a single condition as the dominant phenotype for each main cluster. Perhaps only one environmental phenotype could be emphasized, and that is halophilicity, which is dominant within the “blue” cluster. The bolded numbers depict phenotypes that are prevailing within the respective clusters, however, they are mainly coupled with another adaptation; e.g. mesophilic methanogens in the “red” cluster or hyperthermoacidophiles in the “yellow” cluster.