LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Cook, Perran L. M.; Kessler, Adam J.; Eyre, Bradley D. (2016)
Languages: English
Types: Article
Subjects:
Carbonate sands form a major sediment type in coral reef environments and play a major role in organic matter recycling. It has previously been postulated that porosity of carbonate sand grains may lead to the formation of anoxic microniches that promote denitrification within these sediments. Under this conceptual model, we expect diffusion to exert an influence on process rates, which can be tested by determining their dependence to reactant concentrations. Here, we use two experiments in flow-through reactors to test this hypothesis in carbonate sediments collected from Heron Island, Australia. Denitrification was only observed to commence at substantial rates below 10 μM O2, suggesting anoxic microniches do not exist. Furthermore, denitrification rates were constant above 18 μM nitrate, suggesting no diffusion limitation, as would be expected if significant rates of reaction were occurring within porous grains. Potential rates of denitrification rates relative to respiration were broadly consistent with those previously reported in silicate sands.

Share - Bookmark

Download from

Cite this article

Collected from