Potential N 2 fixation by sulfate-reducing bacteria in a marine intertidal microbial mat

  title={Potential N 2 fixation by sulfate-reducing bacteria in a marine intertidal microbial mat},
  author={Timothy F Steppe and H. W. Paerl},
The first report that sulfate-reducing bacteria (SRB) can fix N2 was published a half century ago. Over the last 50 yr, it has slowly emerged that N2 fixation is widespread among Gramnegative, mesophilic SRB. However, the ecological role of SRB N2 fixation is not well understood. In some marine systems, SRB may contribute significantly to observed N2 fixation (acetylene reduction). To date, evidence of SRB N2 fixation has relied on inferring the results from the use of metabolic inhibitors and… CONTINUE READING

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