Table 12.1
(continued)
Name of category
Environmental parameter
Habitat
Examples
Piezophile/barophile
Pressure
High hydrostatic pressure (up to 130 MPa)
Pyrococcus yayanosil
Methanocaldococcus jannaschii
Methanothermococcus
sp.
Metalophile/
metalotolerant
Metallic concentration
High concentrations of metals
Ferroplasma
sp.
Cupriavidus metallidurans,
Halbacterium
sp.
Ralstonia
sp.
Halococcus salifodinae Haloferax
sp.
Toxitolerant
Organic compounds
High concentrations of toxic reagents/organic solvents
Pseudomonas putida
Radiophile/
radioresistant
Radiations
High radiation levels
Deinococcus radiodurans
D. peraridiltoris
Rubrobacter
sp.
Thermococcus gammatolerance
Xerophile
Desiccation
Anhydrobiotic
Streptomyces bulli
Artemia salina
Osmophile
Osmotic pressure
High osmotic pressure due to high sugar concentration
Zygosaccharomyces rouxii
Anaerobe
Microaerophile
Oxygen level
Cannot tolerate oxygen
Growth in
<21% oxygen
Methanococcus jannaschii
Clostridium
sp.
Oligotrophic
Nutrition
Limited nutrients
Pelagibacter ubique
Polyextremophile
Multiple physicochemical
parameters
Multiple stresses such as temperature, pH, salinity
simultaneously
Deinococcus radiodurans
Halobacterium salinarum
NRC-1
Halomonas campisalis
Picrophilus oshimae
Picrophilus torridus
Methanothermococcus
300
S. Kaushik et al.