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By Anaisa Cespedes

The Anaerobic Food Web

Complex polymers (organic matter)

Polymers

broken down through

FERMENTATION & RESPIRATION

Examples:

cellulose

proteins

lipids

nucleic acids

examples

MONOMERS

Monomers

broken down through

ONLY FERMENTATION

Examples:

sugars

amino acids

fatty acids

examples

The products can go to multiple processes depending on what they are

Next step?

  • H2, CO2
  • ACETATE
  • Volatile Fatty Acids

Volatile Fatty Acids

Volatile Fatty Acids

Examples:

propionate

butyrate

succinate

examples

carry out UNFAVORABLE reactions

  • made stable by consumption of H2 or acetate by other organisms

END products: Acetate or H2 & CO2

Syntrophs

Methanogens

Methane +/- Carbon Dioxide

H2 & CO2 OR Acetate

Methane (CH4)

+/-

CO2

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