Alkaliphiles are microbes classified as extremophiles that thrive in alkaline environments with a p H of 9 to 11 such as soda lakes and carbonate-rich soils. To survive, alkaliphiles maintain a relatively low alkaline level of about 8 p H inside their cells by constantly pumping hydrogen ions (H+)in the form of Hydroxonium ions (H3O+) across their cell membranes into their cytoplasm.

An organism that grows best at high pH.

an organism that is capable of growing at a pH up to 11.5 (basic conditions).