Pp. 101-124 (24)
Many Earth habitats have an extreme cold, heat, salinity, and pressure
conditions. Such places are populated by extremophiles. Thermophiles prefer
environments with high temperatures. Psychrophiles live at very low temperatures.
Halophiles can tolerate high salt, alkaliphiles tolerate high and acidophiles low pH.
Barophiles adapt to live under high pressure. Extremophiles have permanent
modifications in their membranes and in the amino acid composition of their proteins
that allow them to maintain a stable internal environment under extreme conditions.
Many environments have several extreme conditions, e.g. cold and high pressure on the
ocean floor; such places are populated by polyextremophiles.
Alkaliphile, Acidophile, Compatible Solutes, Extremophiles,
Halophile, Halophile, Polyextremophile, Psychrophile, Thermophile.
Department of Molecular Cell & Developmental Biology, University of California, Los Angeles CA, USA.