2020 applicants

Gareth Thomas

Graduate Laboratory Assistant
School of Life Sciences
Postgraduate Research Student
School of Life Sciences
 Gareth Thomas


Ask me about
  • Environmental Biology
  • Environmental Microbiology
  • Marine Biology
  • Outreach
  • Statistics and Coding
  • Ecology
  • Oil Pollution
  • Conservation
  • Hydrocarbon Degradation
  • Bacteria


I am a currently a second year PhD student at the University of Essex under the supervision of Dr Boyd McKew and Dr Terry McGenity in partnership with the Centre for Environment, Fisheries, and Aquaculture Science (Cefas) as well as other collaborators, funded through the National Environmental Research Council via EnvEast Doctorial Training Partnership. My PhD investigates the effects of a range of dispersants and biosurfactants on rates of biodegradation of different crude oils, the succession and structure of microbial communities, and the broader ecology and toxicity of the marine environment.


  • Marine Biology BSc Hons (1st Class) University of Essex (2017)

Research and professional activities


Efficacy and effects of dispersants on the biodegradation of marine oil spills.

This study centres on the efficacy and effects of using synthetic dispersants and biological surfactants as a form of bioremediation in the effort to clean up oil pollution in marine environments. The objectives of the study are to determine how both synthetic dispersants and biological surfactants alter the biodegradation rate of crude oil in sea water. Furthermore, to determine how the different synthetic dispersants and biological surfactants alter the succession, abundance, and diversity of microbial communities.

Supervisor: Dr Boyd McKew , Dr Terry McGenity




Colchester Campus