Microbiology Workshop

MICROBIAL COMPETITION

  • Heterotrophic microbes compete for organic nutrients.
  • Mechanisms for competition


RAPID RESPONSE

  • detect food first
  • exploit and deplete food
  • prevent competitors accessing food
  • become dormant

INHIBIT COMPETITORS

OVERCOME INHIBITION

  • not affected by secondary metabolites
  • use organic inhibitor as food source
  • competitive advantage
    - inhibitor producer expending energy
    - inhibited organisms unable to access food source

RAPID REPRODUCTION

  • asexual reproduction
    - rapid exploitation of favourable substrate
    - rapid production of new generation to survive unfavourable conditions
  • sexual reproduction
    - genetic variation
    - exploitation of slightly different conditions

EXPLOIT SPECIAL NICHE

  • only organism to use complex organic compounds
    - slow response rate not a problem
  • co-operate with larger organism
    - lichen
    - mycorrhiza
    - zooxanthellae