Title

Distributions of microbial activities in deep subseafloor sediments

Document Type

Article

Publication Title

Science

Publication Date

12-24-2004

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.

Volume

306

Issue

5705

First Page

2216

Last Page

2221

DOI

10.1126/science.1101155

ISSN

00368075

Share

 
COinS