Skip to content. | Skip to navigation

Personal tools
Log in
You are here: Home Blog Denitrification of the Oceans Increases Due to Warming

Denitrification of the Oceans Increases Due to Warming

By Dr. Wade Lehmann Posted Jun 06, 2013 12:00 PM
Researchers document acceleration of ocean denitrification during deglaciation.
Denitrification of the Oceans Increases Due to Warming

A schematic representing the Marine Nitrogen Cycle. Wikipedia.

A lack of dissolved nitrogen in the oceans’ surface limits growth and productivity. This is a practice that is often mirrored in reef aquaria where free nutrients are not desirable. In a recent study published in Nature Geoscience, a team measured the effects over time of warming waters on ocean productivity. It was discovered that increasing temperatures, which cause a decrease in oxygen carrying capacity, increased denitrification or the shift from dissolved inorganic nitrogen compounds (ammonia, nitrite, nitrate, urea) to gaseous nitrogen (N2).

While the effects on the ocean overall were significant reductions in oxygen concentrations, in our home systems there is no oxygen limitation and insignificant amounts of denitrification in the water column. However, it highlights the need to have low oxygen environments, like those provided in sufficiently deep sandbeds and internal pore spaces of live rock to help us maintain low inorganic nitrogen levels in our tanks.

For more information, see the summary on ENN ( or the publication. (

Document Actions
blog comments powered by Disqus


Contribute to our blogs!

Do you have news or discussion topics you want to see blogged?  Let us know!