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      Distributions of Microbial Activities in Deep Subseafloor Sediments

      Science

      American Association for the Advancement of Science (AAAS)

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          Abstract

          Diverse microbial communities and numerous energy-yielding activities occur in deeply buried sediments of the eastern Pacific Ocean. Distributions of metabolic activities often deviate from the standard model. Rates of activities, cell concentrations, and populations of cultured bacteria vary consistently from one subseafloor environment to another. Net rates of major activities principally rely on electron acceptors and electron donors from the photosynthetic surface world. At open-ocean sites, nitrate and oxygen are supplied to the deepest sedimentary communities through the underlying basaltic aquifer. In turn, these sedimentary communities may supply dissolved electron donors and nutrients to the underlying crustal biosphere.

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          Author and article information

          Journal
          Science
          Science
          American Association for the Advancement of Science (AAAS)
          0036-8075
          1095-9203
          December 24 2004
          December 24 2004
          : 306
          : 5705
          : 2216-2221
          Article
          10.1126/science.1101155
          15618510
          50e45019-face-41a6-84e3-0cc292b485bd
          © 2004

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