Skip to main content

Microbial Denitrification and Its Ecological Implications in the Marine System

  • Chapter
  • First Online:

Abstract

Microbial denitrification is an essential component of the nitrogen cycle and occurs extensively in the estuarine, coastal and marine ecosystems. Denitrifying organisms are unique because they are facultative and can switch between aerobic and anaerobic modes of respiration by utilizing nitrogen oxides as electron acceptors via a series of reductases under conditions of oxygen limitation and nitrate availability. Oxygen plays a regulatory role in aerobic denitrification and controls the electron transport to oxygen or nitrate. Denitrifiers are ubiquitously distributed encompassing a wide array of microorganisms ranging from bacteria and archaebacteria to fungi and foraminifers. Techniques like terminal restriction fragment length polymorphism analysis, functional single-cell isolation method and fluorescent in situ hybridization have provided new insights into the community structure and functioning of these organisms. Pseudomonas, Paracoccus and Alcaligenes are among the most frequently isolated and studied denitrifying bacterial genera. Denitrification acts as an important feedback mechanism and on a global scale has critical impacts on the Earth’s climate. The process operates as a nitrogen sink in estuaries and controls marine biological productivity. The recently discovered anoxic ammonia oxidation process or anammox, which is greatly responsible for the loss of fixed nitrogen in the oxygen minimum zones in the marine system, is also dependent on denitrification for its nitrite. Denitrification also contributes to significant consequences in global warming and hydrocarbon bioremediation.

This is a preview of subscription content, log in via an institution.

Buying options

Chapter
USD   29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD   169.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD   219.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD   219.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Learn about institutional subscriptions

References

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Trelita de Sousa .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2012 Springer Netherlands

About this chapter

Cite this chapter

de Sousa, T., Bhosle, S. (2012). Microbial Denitrification and Its Ecological Implications in the Marine System. In: Satyanarayana, T., Johri, B. (eds) Microorganisms in Environmental Management. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2229-3_30

Download citation

Publish with us

Policies and ethics