Extending the sub-sea-floor biosphere.

  title={Extending the sub-sea-floor biosphere.},
  author={Erwan Roussel and Marie-Anne Cambon Bonavita and Jo{\"e}l Querellou and Barry A. Cragg and Gordon Webster and Daniel Prieur and Robert John Parkes},
  volume={320 5879},
Sub-sea-floor sediments may contain two-thirds of Earth's total prokaryotic biomass. However, this has its basis in data extrapolation from ~500-meter to 4-kilometer depths, whereas the deepest documented prokaryotes are from only 842 meters. Here, we provide evidence for low concentrations of living prokaryotic cells in the deepest (1626 meters below the sea floor), oldest (111 million years old), and potentially hottest (~100 degrees C) marine sediments investigated. These Newfoundland margin… CONTINUE READING
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