MICRB265 Lecture Notes - Lecture 14: Bioremediation, Sulfur Metabolism, Phospholipid
25 Apr 2018
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Environmental extremes: examples of extremophiles , we often define environments not suitable for human habitation as extreme , but as shown below, any environment can be called extreme for certain groups of organisms. Some examples of organisms and the extreme environments they inhabit include: Acidophiles (e. g. ph <2) in acid mine drainage. Xerophiles (low moisture or humidity) e. g. endolithotrophs under rock surfaces, desert microbes. Barophiles and barotolerant organisms (high hydrostatic pressure) e. g. deep sea organisms. Oligotrophs (low nutrient environments) e. g. deep terrestrial and sediment organisms. Solvent-tolerant organisms (e. g. growth in the presence of 50% toluene, a lipid solvent) Osmotolerant organisms (in high solutes such as sugars) e. g. some fungi. Halophiles and halotolerant organisms (high salt content; see below) Temperature-tolerant organisms (low or high temperature; see below: salinity, the presence of high salt (e. g. nacl) makes non-halotolerant cells shrivel and die from dehydration.
