Metabolic Activity of Subsurface Life in Deep-Sea Sediments

Details Metabolic Activity of Subsurface Life in Deep-Sea Sediments Metabolic Activity of Subsurface Life in Deep-Sea Sediments

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sci...295.2067d&link_type=abstract

Science, Volume 295, Issue 5562, pp. 2067-2070 (2002).

Physics

37

Scientific paper

Global maps of sulfate and methane in marine sediments reveal two provinces of subsurface metabolic activity: a sulfate-rich open-ocean province, and an ocean-margin province where sulfate is limited to shallow sediments. Methane is produced in both regions but is abundant only in sulfate-depleted sediments. Metabolic activity is greatest in narrow zones of sulfate-reducing methane oxidation along ocean margins. The metabolic rates of subseafloor life are orders of magnitude lower than those of life on Earth's surface. Most microorganisms in subseafloor sediments are either inactive or adapted for extraordinarily low metabolic activity.

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