Acid X-Philes: Archaea

This group includes organisms capable of thriving in hyperacidic conditions, most of which have an optimal growth pH of 5 or lower (OGpH<5), although a few have an OGpH slightly above this (e.g., Nanoarchaeum equitans, OGpH=6) but can nonetheless be found flourishing in hyperacidic environments (pH=0.5-1.5).

Here organisms are listed first by the lower end of their pH range, then by the upper end of their pH range, then by OGpH, and for any organisms for which these properties are unknown, they will be listed in alphabetical order at the end.

Phylum: Euryarchaeota

Class: Methanopyri

Class: Methanococci

Class: Eurythermia

Superclass: Neobacteria

Superphylum: DPANN group

Phylum: Diapherotrites

Phylum: Pacearchaeota

Phylum: Aenigmarchaeota

Phylum: Nanoarchaeota

Phylum: Nanohaloarchaeota

Phylum: Woesearchaeota

Phyla: ARMAN

Kingdom: Proteoarchaeota

TACK group

Thaumarchaeota

Aigarchaeota

Crenarchaeota

Korarchaeota

Bathyarchaeota

Geoarchaeota

Asgard group (“Asgardarchaeota”)

Lokiarchaeota

Odinarchaeota

Thorarchaeota

Heimdallarchaeota

"Nitrosotalea is an abundant, globally distributed genus of AOA found in acidic soils (Gubry-Rangin et al., 2011). Thirty per cent of the world's soils are considered acidic (pH < 5.5; von Uexk�ll & Mutert, 1995), and ammonia oxidation in low pH soils is dominated by AOA, rather than AOB (Gubry-Rangin et al., 2010; Lehtovirta-Morley et al., 2011)."

Craig W. Herbold, Laura E. Lehtovirta-Morley, Man-Young Jung, Nico Jehmlich, Bela Hausmann, Ping Han, Alexander Loy, Michael Pester, Luis A. Sayavedra-Soto, Sung-Keun Rhee, James I. Prosser, Graeme W. Nicol, Michael Wagner and Cecile Gubry-Rangin. Ammonia-oxidising archaea living at low pH: Insights from comparative genomics. Environmental Microbiology (2017) 19(12), 4939�4952

References