|Location||University of Technology Sydney, Plant Functional Biology and Climate Change Cluster|
|Eligibility||Australian and New Zealand residents|
Understanding nutrient acquisition strategies in planktonic dinoflagellates under different regimes of environmental variability
Dinoflagellates are a diverse functional group of phytoplankton that
occupy important niches in marine and freshwater environments. Many species
have major ecological and economic impacts, including the formation of
harmful algal blooms and symbioses with marine animals, and play key
biogeochemical and trophic roles in pelagic coastal and open ocean
environments. In comparison to other functional groups, dinoflagellates
grow more slowly and take up nutrients less efficiently, but how they
persist in dynamic aquatic environments is still relatively
This project will investigate the strategies dinoflagellates use to grow under increasing environmental variation; specifically examining whether they transition from a principally autotrophic (photosynthetic) to mixotrophic mode, whereby cells subsidise their light-driven carbon fixation by taking up organic nutrients or engulfing prey (phagotrophy).
The PhD candidate will undertake acclimation and experimental evolution studies with numerous dinoflagellate taxa to investigate responses to changes in environmental variability on two timescales: (1) short (weeks) time scales where acclimation responses dominate, and the impact of different types of variability (i.e., predictability, uncoupling of co-correlated environmental parameters) on organismal responses will be quantified; and (2) long (evolutionary) time scales that include evolutionary dynamics, to investigate how the intensification of a single type of environmental variability drives trait evolution.
Given that mixotrophy has a profound impact on the movement of nutrients and energy through the aquatic foodweb, we will focus on nutrient acquisition traits to resolve this key uncertainty in forecasts of ocean nutrient cycling. By understanding how the action of natural selection is affected by environmental variability, these experiments will also provide insight into the choice or selective engineering of phytoplankton stock cultures used in aquaculture, an industry that currently relies on a few selected algal genotypes. Thus, the project has both fundamental and applied science outcomes.
Desirable skills and qualifications of applicants
We are seeking a highly motivated PhD candidate with a background in microbiology, algal physiology, molecular ecology or a related field, and an interest in data analytics and bioinformatics. In addition to meeting the general PhD entry requirements of UTS, the ideal candidate should have a first class Honours or Masters (research) degree and/or published work or research experience. A strong background in genetics and microbiology is desirable; experience with command line and programming skills preferred but not essential.
How to apply
Expressions of interest including a CV should be sent to Prof Martina Doblin at the University of Technology Sydney.
Applications close: 31 August 2018, at 5 pm EST.
Applicants for the scholarship must also apply to be admitted to the PhD degree at UTS.
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