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Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats
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Eukaryotic microorganisms in cold environments: examples from Pyrenean glaciers.

Laura García-Descalzo1, Eva García-López, Marina Postigo

  • 1Microbial Evolution Laboratory, Centro de Astrobiología (Consejo Superior de Investigaciones Cientificas - Instituto Nacional de Técnica Aeroespacial) Torrejón de Ardoz, Madrid, Spain.

Frontiers in Microbiology
|March 22, 2013
PubMed
Summary

Microbial eukaryotes, including Viridiplantae and Rhizaria, were identified in Pyrenean glacier ice. Their diversity varied with glacier altitude, area, and pH, offering insights into ancient ice ecosystems.

Keywords:
Pyrenean glaciersancient icebiodiversityclimate changeeukaryotic microorganismsglaciers

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14:38

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential

Published on: April 20, 2012

Area of Science:

  • Glaciology
  • Microbiology
  • Molecular Ecology

Background:

  • Eukaryotic microorganism viability in icy environments remains poorly understood.
  • Pyrenean glaciers, recently deglaciated, offer access to ancient ice layers, including those from the
  • Little Ice Age
  • .

Purpose of the Study:

  • To characterize microbial eukaryotic populations in Pyrenean glacier ice samples.
  • To investigate the genetic diversity and community structure of these microorganisms.
  • To explore potential correlations between microbial composition and environmental factors.

Main Methods:

  • Chemical and microscopical characterization of ice samples.
  • Molecular analysis using 18S rRNA gene sequencing.
  • Phylogenetic analysis of identified eukaryotic sequences, including removal of chimeric sequences.

Main Results:

  • Significant protist genetic diversity was found, with higher phylum richness in Aneto and Monte Perdido glaciers.
  • Dominant taxonomic groups included Viridiplantae and Rhizaria.
  • Protist community structure varied significantly between glaciers and correlated with altitude, glacier area, and ice pH.

Conclusions:

  • Pyrenean glaciers harbor diverse microbial eukaryotic communities.
  • Environmental factors like altitude, glacier size, and pH significantly influence protist community structure.
  • This study provides valuable insights into the biodiversity of ancient glacial ice.