Nitrification and denitrification: Probing the nitrogen cycle in aquatic environments

  title={Nitrification and denitrification: Probing the nitrogen cycle in aquatic environments},
  author={Bess B. Ward},
  journal={Microbial Ecology},
  • B. Ward
  • Published 1 November 1996
  • Biology
  • Microbial Ecology
Methods designed to detect microorganisms involved in the biogeochemistry of nitrogen in the marine environment are rapidly being developed and deployed in ecological investigations. Probes based on phylogenetic sequences (usually rRNA) and those based on the sequences of functional genes or proteins have both been demonstrated in the nitrogen cycle. The most progress has been made for ammonia oxidizers; several sets of PCR primers have been described and their specificity may be optimized to… 
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Geomicrobiology of nitrogen in a coastal aquifer : isotopic and molecular methods to examine nitrification and denitrification in groundwater
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Pure-culture isolations from a positive MPN tube inoculated with oxygenated sediment and representing a single point in a seasonal cycle produced ammonia-oxidizing strains belonging to the genus Nitrosospira, which extend the serological diversity of this group of bacteria.
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The composition of the atmosphere is influenced both directly and indirectly by biological activity. Evidence is presented here to suggest that nitrification in soil is a potentially significant
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The nitrifiers, as a group, apparently are not derived from an ancestral nitrifying phenotype, and consideration of physiology and phylogenetic distribution suggested that nitrite-oxidizing bacteria of the alpha and gamma subdivisions are derived from immediate photosynthetic ancestry.