Decomposition

• What are the role of decomposers?

  • Decomposers break down organic material
  • Respire
  • Release CO2 into atmosphere (aerobic)
  • Release CH4 in anaerobic respiration
• What happens in decomposition?

  • Microorganisms from gut/environment
  • Respire
  • Use body as respiratory substrate
  • Enzymes from microorganisms decompose body
• What are the signs of decomposition?

  • Skin colour changes (green -> blue/purple)
  • Bloating of skin - bacteria produce gas
  • Skin falls of/ dehydrates
  • Mass decreases
• What are the factors that affect rate of decomposition?

  • Temp
  • O2 availability