The biology and ecology of disease in seagrass: Understanding the pseudo-fungus Phytophthora gemini and its impact on common eelgrass (Zostera marina) development

The biology and ecology of disease in seagrass: Understanding the pseudo-fungus Phytophthora gemini and its impact on common eelgrass (Zostera marina) development

Project Description

Supervisors

Professor Michael Cunliffe, Marine Biological Association and School of Biological and Marine Sciences, University of Plymouth

Dr George Littlejohn, School of Biological and Marine Sciences, University of Plymouth

Mr Andy Cameron, Ocean Conservation Trust

 

Scientific Background

Seagrass meadows, such as those formed by Zostera marina (common eelgrass), are vital marine ecosystems that support biodiversity, stabilise sediments and sequester carbon. However, these meadows are increasingly threatened by climate change, pollution and disease. Emerging evidence highlights the role of microbial pathogens, especially the pseudofungus Phytophthora gemini (a fungus-like oomycete), in undermining restoration efforts by infecting eelgrass seeds and seedlings. This project addresses a critical knowledge gap in the biology and ecology of seagrass pathogens and their impact on restoration success, offering timely insights into disease mitigation strategies.

 

Research Methodology

The PhD researcher will investigate the infection biology of Phytophthora gemini and its interaction with Zostera marina through a combination of laboratory assays, microscopy, and molecular techniques (e.g. qPCR, metabarcoding) to characterise pathogen life cycles, host responses and environmental tolerances. Fieldwork will be conducted at selected coastal sites to assess natural infection dynamics and collect samples for analysis. Restoration trials will be designed to test seed treatments and planting strategies under controlled and semi-natural conditions. The project will be based at the Marine Biological Association (MBA) in Plymouth, with additional work at the University of Plymouth and the Ocean Conservation Trust. There will be opportunities for collaboration across UK and international research networks.

 

Training

The researcher will gain interdisciplinary training in microbiology, marine ecology, plant pathology, molecular biology and restoration science, with a strong emphasis on applied ecological research. They will develop skills in experimental design, statistical analysis and scientific communication. Opportunities include attending international conferences, publishing in peer-reviewed journals and engaging with stakeholders involved in seagrass restoration. The MBA offers a vibrant research environment with access to cutting-edge facilities and mentoring from experienced scientists.

 

Person Specification

We seek an enthusiastic individual with a strong interest in marine biology, plant–microbe interactions and ecological restoration. A background in biology, environmental science or a related discipline is desirable. Prior experience in microbiology, molecular techniques, microscopy or fieldwork is advantageous but not essential. The ideal candidate will be curious, collaborative and motivated to contribute to ecological research with real-world impact.

Acceptable first degree subjects: Biology, Marine Biology, Ecology, Botany / Plant Biology, Molecular Ecology / Molecular Biology

Project code: CUNLIFFE_MBA_ARIES26

References

  • Diver P et al & Cunliffe M (2025). Cell morphological plasticity in response to substrate availability of a cosmopolitan polymorphic yeast from the open ocean. Mycologia 117 95–109.
  • Chrismas N et al & Cunliffe M (2024) Metatranscriptomics reveals diversity of symbiotic interaction and mechanisms of carbon exchange in the marine cyanolichen Lichina pygmaea. New Phytologist 241 2243-2257.
  • Laundon D et al & Cunliffe M (2022) A cellular and molecular atlas reveals the basis of chytrid development eLife 11:e73933.
  • Littlejohn G et al & Grant M (2021) Chloroplast immunity illuminated. New Phytologist 229 3088-3107.
  • Govers LL et al (2016) Marine Phytophthora species can hamper conservation and restoration of vegetated coastal ecosystems. Proc. R. Soc. B.28320160812

Key Information

  • This studentship has been shortlisted for funding under the UKRI NERC DLA funding scheme and will commence on 1 October 2026. The closing date for applications is 23:59 on 7 January 2026.
  • Successful candidates who meet UKRI’s eligibility criteria will be awarded a fully-funded studentship, which covers fees, maintenance stipend (£20,780 p.a. for 2025/26) and a research training and support grant (RTSG). A limited number of studentships are available for international applicants, with the difference between 'home' and 'international' fees being waived by the registering university. Please note, however, that ARIES funding does not cover additional costs associated with relocation to, and living in, the UK, such as visa costs or the health surcharge.
  • ARIES postgraduate researchers (PGRs) benefit from bespoke training and ARIES provides £2,500 to every student for access to external training, travel and conferences, on top of all Research Costs associated with the project. Excellent applicants from quantitative disciplines with limited experience in environmental sciences may be considered for an additional 3-month stipend to take advanced-level courses. Excellent applicants from quantitative disciplines with limited experience in environmental sciences may be considered for an additional 3-month stipend to take advanced-level courses.
  • ARIES is committed to equality, diversity, widening participation and inclusion in all areas of its operation. We encourage enquiries and applications from all sections of the community regardless of gender, ethnicity, disability, age, sexual orientation and transgender status. Academic qualifications are considered alongside non-academic experience, and our recruitment process considers potential with the same weighting as past experience.
  • All ARIES studentships may be undertaken on a part-time or full-time basis. International applicants should check whether there are any conditions of visa or immigration permission that preclude part-time study. All advertised project proposals have been developed with consideration of a safe, inclusive and appropriate research and fieldwork environment with respect to protected characteristics. If you have any concerns, please contact us.
  • For further information, please contact the supervisor. To apply for this Studentship, follow the instructions at the bottom of the page or click the 'apply now' link.
  • ARIES is required by our funders to collect Equality and Diversity Information from all of our applicants. The information you provide will be used solely for monitoring and statistical purposes; it will remain confidential and will be stored on the UEA SharePoint server. Data will not be shared with those involved in making decisions on the award of Studentships and will have no influence on the success of your application. It will only be shared outside of this group in an anonymised and aggregated form. You will be asked to complete the form by the University to which you apply.
  • ARIES studentships are subject to UKRI terms and conditions. Postgraduate Researchers are expected to live within reasonable distance of their host organisation for the duration of their studentship. Please see https://www.ukri.org/publications/terms-and-conditions-for-training-funding/ for more information.

Apply Now

Apply now via  University of Plymouth ARIES Doctoral Training