Methanogenesis

Definition

Methanogenesis is a form of anaerobic respiration carried out by certain archaea, where methane is produced as the final product. It plays a crucial role in the carbon cycle and occurs in environments such as wetlands and the guts of ruminants.

5 Must Know Facts For Your Next Test

1. Methanogenesis is performed exclusively by methanogenic archaea.
2. This process occurs in strictly anaerobic conditions.
3. Methanogenesis contributes to greenhouse gas emissions by producing methane (CH4).
4. The primary substrates for methanogenesis are carbon dioxide (CO2) and hydrogen (H2), or acetate.
5. Methanogens are found in diverse environments, including wetlands, landfills, and the digestive tracts of some animals.

Review Questions

• What type of microorganisms are responsible for methanogenesis?
• In what kind of environmental conditions does methanogenesis occur?
• What are the main substrates used in the methanogenesis process?

Related terms

Anaerobic Respiration:

A type of respiration that does not use oxygen and produces energy through chemical reactions.

Archaea:

A domain of single-celled microorganisms that are distinct from bacteria and eukaryotes.

Biogeochemical Cycles:

Natural pathways by which essential elements circulate through ecosystems.