PhD Studentship available for application | News

PhD Studentship available for application

Rapid climate change and its impact on biogeochemical cycling a carbon sequestration in Arctic sediments

PhD Supervisors:

Prof Ursula Witte (Oceanlab, University of Aberdeen), u.witte@abdn.ac.uk; http://www.abdn.ac.uk/oceanlab/research/ursula-witte.php

Dr. Greg Cowie, University of Edinburgh; dr.greg.cowie@ed.ac.uk; http://www.geos.ed.ac.uk/geosciences/people/glcowie

Background Marine sediments form a major reservoir in the global carbon (C) cycle and Nitrogen (N) cycles, and C and N cycling or burial in these sediments constitute important ecosystem services that can supply nutrients to primary producers or sequester them on geological time scales. Climate change is ongoing, and amongst the most striking evidence is the rapid reduction in Arctic Sea Ice cover, which has profound consequences for the timing and amplitude of primary production (PP), and the relative contribution of the various primary producers to overall PP. Due to close benthic-pelagic coupling in arctic marine ecosystems, changes in PP patterns are likely to cascade quickly to benthic food webs, and key ecosystem functions such as nutrient recycling or carbon storage.

Project description This PhD studentship will investigate the link between the timing and characteristics of the sedimentation of particulate organic matter (POM) to the seafloor and and the mediation of C and N cycling or burial rates by the benthic community. Specifically, OM sedimentation patterns and community response will be recorded year-round through deployment of an under-ice benthic observatory. In addition, yearly cruises with the Canadian icebreaker CCGS Amundsen will allow sampling of and experimentation with sediment and benthic fauna. The relative significance of different primary producers as food source for the benthos, as well as their relative contribution to nutrient cycling and sequestration will be assessed through analysis of biomarkers, compound specific isotope analysis, and benthic flux measurements. Biomarker analyses (including pigments, amino acids and lignin) of sinking particulates and surficial sediments will provide insights on the algal sources and the "quality" of OM delivered to the benthos. A highly resolved and dated down core sediment biomarker profile will provide a detailed record of recent changes in environmental conditions, OM sources and C, N and P burial at the site. The work will be carried out in close collaboration with the Canadian research network ArcticNet,and Professor Philippe Archambault (Laval University, Quebec) will serve as an external supervisor.

Research Training The successful candidate will work as part of an interdisciplinary team at the interface between benthic biogeochemistry, marine biology and modeling and will be trained in a wide range of field and laboratory techniques. Furthermore the student will have the opportunity to attend a wide variety of PDP courses offered by the Universities of Aberdeen and Edinburgh on generic or subject specific skills that are essential for the transition to employment.

To apply, please send a CV (including references) and covering letter to u.witte@abdn.ac.uk

Application deadline: 10.2.2017. Interviews will be held in Edinburgh 21– 24.2.2017.

 

Author: Prof. Ursula Witte

Search News

Browse by Month

2017

  1. Jan
  2. Feb There are no items for February 2017
  3. Mar
  4. Apr There are no items for April 2017
  5. May
  6. Jun
  7. Jul There are no items for July 2017
  8. Aug There are no items for August 2017
  9. Sep There are no items for September 2017
  10. Oct There are no items for October 2017
  11. Nov There are no items for November 2017
  12. Dec There are no items for December 2017

2016

  1. Jan There are no items for January 2016
  2. Feb There are no items for February 2016
  3. Mar There are no items for March 2016
  4. Apr There are no items for April 2016
  5. May
  6. Jun There are no items for June 2016
  7. Jul
  8. Aug
  9. Sep
  10. Oct There are no items for October 2016
  11. Nov There are no items for November 2016
  12. Dec

2015

  1. Jan
  2. Feb There are no items for February 2015
  3. Mar There are no items for March 2015
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

2014

  1. Jan There are no items for January 2014
  2. Feb There are no items for February 2014
  3. Mar
  4. Apr
  5. May There are no items for May 2014
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct There are no items for October 2014
  11. Nov There are no items for November 2014
  12. Dec

2013

  1. Jan There are no items for January 2013
  2. Feb
  3. Mar There are no items for March 2013
  4. Apr There are no items for April 2013
  5. May
  6. Jun There are no items for June 2013
  7. Jul
  8. Aug
  9. Sep There are no items for September 2013
  10. Oct There are no items for October 2013
  11. Nov
  12. Dec There are no items for December 2013

2011

  1. Jan There are no items for January 2011
  2. Feb There are no items for February 2011
  3. Mar
  4. Apr There are no items for April 2011
  5. May There are no items for May 2011
  6. Jun There are no items for June 2011
  7. Jul There are no items for July 2011
  8. Aug There are no items for August 2011
  9. Sep There are no items for September 2011
  10. Oct There are no items for October 2011
  11. Nov There are no items for November 2011
  12. Dec There are no items for December 2011

2010

  1. Jan
  2. Feb There are no items for February 2010
  3. Mar There are no items for March 2010
  4. Apr There are no items for April 2010
  5. May There are no items for May 2010
  6. Jun There are no items for June 2010
  7. Jul There are no items for July 2010
  8. Aug There are no items for August 2010
  9. Sep There are no items for September 2010
  10. Oct There are no items for October 2010
  11. Nov There are no items for November 2010
  12. Dec There are no items for December 2010