Microbe Magazine
Published: December 1, 2016
C-DEBI Contribution Number: 346



  • The oceans that cover 70% of the Earth’s surface lie above 3×108 km3 of sediment containing an estimated 3×1029 microbial cells.
  • The role played by spores in low-energy sedimentary ecosystems remains an enigma.
  • Despite conflicting results from earlier analyses, archaea and bacteria apparently exist in similar abundances within deep-sea sediments.
  • Within these sediments, anaerobic metabolisms dominate, especially those in which sulfate reduction and oxidation of organic matter are coupled.
  • Modeling proves crucial when trying to connect sedimentary microorganisms to their appropriate geochemical environments.