Corrigendum: Low Energy Subsurface Environments as Extraterrestrial Analogs.

[This corrects the article DOI: 10.3389/fmicb.2018.

Low Energy Subsurface Environments as Extraterrestrial Analogs.

Earth's subsurface is often isolated from phototrophic energy sources and characterized by chemotrophic modes of life. These environments are often oligotrophic and limited in electron donors or electron acceptors, and include continental crust, subseafloor oceanic crust, and marine sediment as well as subglacial lakes and the subsurface of polar desert soils. These low energy subsurface environments are therefore uniquely positioned for examining minimum energetic requirements and adaptations for chemotrophic life.