PhD Research: Understanding microbial colonisation and biodegradation of microplastics in the ocean
We are facing one of the most important marine pollution crises on our planet, threatening the biodiversity of marine ecosystems, coastal tourism, fisheries and aquaculture. Plastics pollution is ubiquitous and persistent in the marine environment, and dominated by the smaller abundant plastic particles (<5 mm) defined as microplastics, for which their fate and impacts we still don’t fully understand. My PhD research investigates microbial colonisation and biofilm development on microplastics in the marine environment as well as assessing the biodegradation potential of these microbes. My research is across a range of study environments and depths, looking at the Plastisphere of a coastal Vietnamese site and the deep-sea subarctic North Atlantic. Through in-situ incubations of environmentally relevant microplastic polymer types and control materials we will gain an improved understanding of biofilm development, community succession and differences between microplastic polymer types and control material communities. Through incubation of environmental samples with isotopically labelled plastics we will use DNA-stable isotope probing to identify microbes capable of degrading microplastics.