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Microbial life at extremely low nutrient levels.

P Hirsch1

  • 1Institut fur Allgemeine Mikrobiologie, University of Kiel, FRG.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1986
PubMed
Summary
This summary is machine-generated.

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Microorganisms called oligotrophs thrive in low-nutrient environments like distilled water and natural habitats. These resilient microbes adapt to scarcity by altering morphology and forming storage products.

Area of Science:

  • Microbiology
  • Environmental Science

Background:

  • Oligotrophs are microorganisms capable of growing in environments with extremely low nutrient levels.
  • Distilled water and natural habitats like snow, rainwater pools, and oceans contain minimal organic carbon (1-5 mg/l).

Purpose of the Study:

  • To identify microorganisms that can grow in low-nutrient conditions.
  • To understand the adaptations of oligotrophs to nutrient-poor environments.

Main Methods:

  • Isolation and observation of microorganisms from distilled water and natural low-nutrient environments.
  • Analysis of microbial growth and adaptation strategies under varying nutrient concentrations.

Main Results:

  • Numerous bacterial species (e.g., Pseudomonas, Caulobacter) and some fungi and yeasts were identified in distilled water.

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  • Oligotrophs exhibit adaptations such as surface attachment, polymer formation, storage product accumulation, and morphological changes.
  • Extreme oligotrophs can survive in nutrient-depauperate microhabitats within nutrient-rich environments.

    • Conclusions:

    • Oligotrophs possess remarkable adaptability to survive and thrive in oligotrophic conditions.
    • Microbial life can persist in environments previously considered too nutrient-poor for survival.
    • Understanding oligotrophs provides insights into microbial survival strategies in extreme environments.