Dictionary > Methanogen

Methanogen

Definition
noun, plural: methanogens
An archaeabacterium capable of methanogenesis
Supplement
A methanogen pertains to any of the various archaeabacteria that are capable of producing methane through the process of methanogenesis. Methanogenesis is the production of methane as a part of the metabolism in methanogens. It is usually the final step in the decomposition of biomass. Methanogens should not be confused with methanotrophs, which are prokaryotes that metabolize methane for nutrition and growth.
Methanogens produce methane as metabolic byproduct. These microbes thrive in anoxic conditions and are common in wetlands. They are the ones responsible for the production of marsh gas. Some of them are also found in the digestive tracts of animals, e.g. ruminants and humans. These microbes that live in the digestive tract are responsible for the presence of methane in ruminants’ belching and humans’ flatulence. Others live as extremophiles in hot springs and hydrothermal vents.1
Methanogens are strictly anaerobic. Most of them are sensitive to oxygen and are susceptible to oxygen stress especially for longer periods of time. Some of the methanogens are as follows: Methanobrevibacter gottschalkii, Methanobrevibacter smithii, Methanococcus jannaschii, Methanococcus maripaludis, Methanogenium frigidum, Methanopyrus kandleri, Methanosaeta concilii, Methanosarcina acetivorans, Methanosarcina barkeri, and Methanosphaera stadtmanae.
See also:

Mentioned in:

  • Chemotroph
  • Chemoautotroph
  • Chemolithotroph
  • Reference(s):

    1 Methanogen. Wikipedia.org. Retrieved from ://en.wikipedia.org/wiki/Methanogen.


    You will also like...

    Darwin's Finches - Natural Selection
    Darwin and Natural Selection

    This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

    Energy pyramid
    Freshwater Community Energy Relationships – Producers & Consumers

    This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

    Psychiatry and mental disorders
    Psychiatry & Mental Disorders

    Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..

    Genetic engineering
    Genetic Engineering Advantages & Disadvantages

    This tutorial presents the benefits and the possible adverse eventualities of genetic engineering. Know more about this ..

    Peppered moth ("Biston betularia") melanic and light form
    Examples of Natural Selection

    Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

    Chromosomes X and Y and Sex Determination
    Chromosomes X and Y and Sex Determination

    This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

    Related Articles...

    No related articles found

    See all Related Topics