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Applications are now open for PhD studentships starting in October 2018. 

Please read the recruitment introduction for more information about eligibility, how to apply, and possibilities for further funding.

The deadline for applications is 8 January 2018.

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FITZSIMONS_UPLYM18EE

FITZSIMONS_UPLYM18EE - Production of volatile nitrogen by marine algae: implications of a changing nutrient balance

Project description

Selected other project supervisors
Dr Gill Malin (UEA)
Dr Ruth Airs (PML)

Scientific Background
Microalgae are major components of marine ecosystems worldwide, providing essential ecosystem services including using carbon dioxide and producing oxygen. Our research shows that they also produce nitrogen-containing compounds (N-osmolytes) used for alleviating salinity stress and maintenance of photosynthesis. These compounds degrade in seawater to produce methylamines, which can move into the atmosphere, where they take part in chemical reactions, influencing cloud formation and climate.     

This PhD is an exciting opportunity to advance understanding of the production of N-osmolytes and methylamines by algae today and in the future. Climate change scenarios predict conditions leading to variable riverine inputs to coastal areas and changes to the balance of the nutrient pools. Your challenge is to investigate how these changes might affect production of N-osmolytes and methylamines, which could have important consequences for the climate.

Objectives

  • Use liquid chromatography-mass spectrometry and gas chromatography to examine production of N-osmolytes and methylamines for a global microalgal species (Emiliania huxleyi).  
  • Undertake seasonal sampling in the Western English Channel to investigate production of N-osmolytes and methylamines under changing natural inputs of organic nitrogen.
  • Experimentally determine how changes in composition of the nitrogen pool influence production of N-osmolytes and methylamines in cultures of Emiliania huxleyi.

Supervisory team
Based at the University of Plymouth (Dr Mark Fitzsimons) with periods of working at Plymouth Marine Laboratory (Dr Ruth Airs) and the University of East Anglia (Dr Gill Malin), this studentship will include algal culturing and field sampling in coastal and oceanic waters. We are a strong multidisciplinary team with excellent track records for research on algae and measurement of the compounds to be studied.   

Candidate Profile
This project would suit a self-motivated student, with a good experimental skills and practical ingenuity. Relevant analytical skills and an appreciation of algae would be ideal. You should have/anticipate a 1st or 2i BSc and/or an MSc in the Biological, Chemical or Environmental Sciences.

Funding
This project has been shortlisted for funding by the EnvEast NERC Doctoral Training Partnership, comprising the Universities of East Anglia, Essex and Kent, with over twenty other research partners. Undertaking a PhD with the EnvEast DTP will involve attendance at mandatory training events throughout the course of the PhD.

Shortlisted applicants will be interviewed by EnvEast on 12/13 February 2018.

Selected candidates who meet RCUK’s eligibility criteria will be awarded a NERC studentship - in 2017/18, the stipend is £14,553. Ordinarily, EnvEast studentships are for 3.5 years, although longer awards may be made to applicants from quantitative disciplines who have limited experience in the environmental sciences, to allow them to take appropriate advanced-level courses in the subject area.

In most cases, UK and EU nationals who have been resident in the UK for 3 years are eligible for a stipend. For non-UK EU-resident applicants NERC funding can be used to cover tuition fees, RTSG and training costs, but not any part of the stipend. Individual institutes may, however, elect to provide a stipend from their own resources.

This PhD studentship is expected to begin in September/October 2018. Both full-time and part-time study are possible (those planning to study part-time may wish to discuss this with the supervisor before applying).

References

  1. Dall’Osto, M., Ovadnevaite, J., Paglione, M., Beddows, D. C. S., Ceburnis, D., Cree, C., Cortés, P., Zamanillo, M., Nunes, S. O., Pérez, G. L., Ortega-Retuerta, E., Emelianov, M., Vaqué, D., Marrasé, C., Estrada, M., Sala, M. M., Vidal, M., Fitzsimons, M. F., Beale, R., Airs, R., Rinaldi, M., Decesari, S., Cristina Facchini, M., Harrison, R. M., O’Dowd, C. & Simó, R. (2017) Antarctic sea ice region as a source of biogenic organic nitrogen in aerosols. Scientific Reports, 7, 6047.
  2. Beale, R. & Airs, R. (2016) Quantification of glycine betaine, choline and trimethylamine N-oxide in seawater particulates: Minimisation of seawater associated ion suppression. Analytica Chimica Acta, 938, 114.
  3. McKew, B. A., Metodieva, G., Raines, C. A., Metodiev, M. V. & Geider, R. J. (2015) Acclimation of Emiliania huxleyi (1516) to nutrient limitation involves precise modification of the proteome to scavenge alternative sources of N and P. Environmental Microbiology, 17, 4050.
  4. Almeida, J. et al. (2013) Molecular understanding of sulphuric acid-amine particle nucleation in the atmosphere. Nature, 502, 359.
  5. Franklin, D.J., Airs, R.L., Fernandes, M., Bell, T.G., Bongaerts, R.J., Berges, J.A., Malin, G. (2012) Identification of senescence and death in Emiliania huxleyi andThalassiosira pseudonana: Cell staining, chlorophyll alterations, and dimethylsulfoniopropionate (DMSP) metabolism.  Limnology & Oceanography 57, 305.