quantification of ammonia oxidation rates and the distribution of ammonia-oxidizing archaea and bacteria in marine sediment depth profiles from catalina island, california

Clicks: 308
ID: 204177
2012
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Star

Ranked #347 of 875 articles by views in journal of magnetic resonance (san diego, calif : 1997)

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 875 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Microbial communities present in marine sediments play a central role in nitrogen biogeochemistry at local to global scales. Along the oxidation-reduction gradients present in sediment profiles, multiple nitrogen cycling processes (such as nitrification, denitrification, nitrogen fixation, and anaerobic ammonium oxidation) are active and actively coupled to one another—yet the microbial communities responsible for these transformations and the rates at which they occur are still poorly understood. We report pore water geochemical (O2, NH4+, NO3-) profiles, quantitative profiles of archaeal and bacterial amoA genes, and ammonia oxidation rate measurements, from bioturbated marine sediments of Catalina Island, California. Across triplicate sediment cores collected offshore at Bird Rock and within Catalina Harbor, oxygen penetration (0.24-0.5 cm depth) and the abundance of amoA genes (up to 9.30 x 107 genes g-1) varied with depth and between cores. Bacterial amoA genes were consistently present at depths of up to 10 cm, and archaeal amoA was readily detected in Bird Rock cores, and Catalina Harbor cores from 2008, but not 2007. Although detection of DNA is not necessarily indicative of active growth and metabolism, ammonia oxidation rate measurements made in 2008 (using isotope tracer) demonstrated the production of oxidized nitrogen at depths where amoA was present. Rates varied with depth and between cores, but indicate that active ammonia oxidation occurs at up to 10 cm depth in bioturbated Catalina Harbor sediments, where it may be carried out by either or both ammonia-oxidizing Archaea and Bacteria.
Reference Key
ebeman2012frontiersquantification Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;J. Michael eBeman;Victoria Jean Bertics;Victoria Jean Bertics;Thomas eBraunschweiler;Jesse eWilson
Journal journal of magnetic resonance (san diego, calif : 1997)
Year 2012
DOI
10.3389/fmicb.2012.00263
URL
http://journal.frontiersin.org/Journal/10.3389/fmicb.2012.00263/full
Keywords
sediments nitrification archaea

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.