Phyloecological cluster tree of <i>Archaea</i>.

<p><b>A.</b> The cluster tree was built with average linkage of distances based on correlation metric by using the 5-features subset. Cut-off distance for the formation of clusters was 1.0. The tree is divided into three main phyloecological clusters. The first cluster (highlighted in yellow) is comprised of hyperthermophilic species, non-halophilic or halotolerant, and aerobic hyperthermoacidophiles. The members of the second cluster (highlighted in blue) are halophilic and extremely halophilic <i>Archaea</i>, growing in the various temperature ranges (mesophilic, thermophilic or hyperthermophilic values), and conditions of neutral pH or alkaliphilic. The third cluster (highlighted in red) contains mesophilic (mostly methanogens) and thermoacidophilic <i>Archaea</i>, non-halophiles or halotolerant. <b>B.</b> Leaves of the tree display names of phyla for each species from <b>A</b>.