Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for id:"handle:10379/6287". One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


National University of Ireland – Galway

1. Duff, Aoife. Molecular microbial ecology of ammonia oxidation in coastal sediments .

Degree: 2017, National University of Ireland – Galway

This thesis focuses on the processes of nitrification in three coastal bays, specifically, aerobic ammonia oxidation which is the rate limiting step of nitrification and is mediated by ammonia oxidising bacteria and/or archaea (AOB/AOA). Rusheen, Clew and Kinvarra bay are located on the Atlantic coast of Ireland. The aim of this project is to combine in situ field data with experimental approaches, addressing temporal and spatial changes in ammonia oxidiser (AO) activity, abundance and diversity across environmental gradients in coastal bay ecosystems, in order to elucidate the key AO and environmental drivers within dynamic intertidal sediment ecosystems. Using this approach we report for the first time transcriptionally active AOB and AOA were present within Rusheen bay intertidal sediments, bringing us a step closer to confirming actively nitrifying co-occurring AOB and AOA in intertidal sediments. In chapter three we observe the huge diversity that can be found in coastal sediments. We show that using 16S rRNA transcripts enables us to identify low abundant or rare OTUs that were not picked up by sequencing DNA alone. Finally in chapter four through the use of experimental sediment microcosm incubations combined with SIP, we were able to demonstrate the growth and activity of Nitrosoarchaeum like AOAs in a low salinity habitat originating from intertidal coastal sediment. In addition throughout all three chapters we saw the impact environmental conditions such as nutrient concentrations, salinity, pH and temperature have on driving the distribution of communities within intertidal sediments. Advisors/Committee Members: Smith, Cindy (advisor).

Subjects/Keywords: Ammonia oxidation; AOB; AOA; qPCR; SIP; amoA; Nitrosoarchaeum; Microbiology; Nitrification; Nitrogen cycle; Salinity; Transcript

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Duff, A. (2017). Molecular microbial ecology of ammonia oxidation in coastal sediments . (Thesis). National University of Ireland – Galway. Retrieved from http://hdl.handle.net/10379/6287

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Duff, Aoife. “Molecular microbial ecology of ammonia oxidation in coastal sediments .” 2017. Thesis, National University of Ireland – Galway. Accessed February 23, 2017. http://hdl.handle.net/10379/6287.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Duff, Aoife. “Molecular microbial ecology of ammonia oxidation in coastal sediments .” 2017. Web. 23 Feb 2017.

Vancouver:

Duff A. Molecular microbial ecology of ammonia oxidation in coastal sediments . [Internet] [Thesis]. National University of Ireland – Galway; 2017. [cited 2017 Feb 23]. Available from: http://hdl.handle.net/10379/6287.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Duff A. Molecular microbial ecology of ammonia oxidation in coastal sediments . [Thesis]. National University of Ireland – Galway; 2017. Available from: http://hdl.handle.net/10379/6287

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.