PhD Studentship: Microbial Degradation of Trace Gases in Post-Wildfire Environments

Primary supervisor - Dr Marcela Hernández García 

Background 

Climate change is increasing the frequency and intensity of wildfires worldwide, releasing significant amounts of trace gases such as carbon monoxide (CO) and volatile organic compounds (VOCs) like isoprene. These emissions pose risks to human and ecosystem health and contribute to further climate change. Understanding how these gases are processed in burned soils is crucial for predicting environmental impacts and informing effective wildfire management. The PhD student on this project will investigate how microbial communities mediate the degradation of trace gases in post-fire soils and whether this process can be enhanced through organic amendments. This project will explore the interactions between pyrogenic carbon, trace gas–oxidising microbes, and soil organic matter to uncover new insights into ecosystem recovery after wildfires. By understanding these interactions, we can develop practices and technologies for environmental management, conservation, and restoration following wildfire events. 

Methodology 

The research will employ a combination of in-situ gas measurements, soil mesocosm experiments, and cutting-edge molecular techniques. Gas samples, including methane, CO, and isoprene, will be measured by gas chromatography, while DNA sequencing and metagenomic analyses will identify functional genes responsible for trace gas oxidation. Mesocosm experiments will test the effects of organic amendments on microbial activity and trace gas consumption, providing critical data on soil recovery and greenhouse gas mitigation. 

Expected outcomes 

This project will generate foundational knowledge on the microbial potential of burned soils to act as sinks for VOCs and other trace gases, with implications for climate action, soil health, and biodiversity conservation. It will also provide a strong platform for future research, including stable-isotope probing to identify active trace gas consumers and further study of microbial ecosystem services post-wildfire. 

Person specification 

The successful candidate should have a strong background in microbiology, biochemistry, soil or environmental sciences (BSc/Masters in Soil Microbiology, Environmental Microbiology, or similar). 

Entry requirements

The standard minimum requirement is 2.1 in Biological Sciences.

Mode of study

Full-time

Start date

1 October 2026

Funding

This PhD project is in a competition for a Faculty of Science funded studentship. Funding is available to UK applicants and comprises ‘home’ tuition fees and an annual stipend for 3 years.

Closing Date

10/12/2025

To apply for this role, please click on the 'Apply' button above.

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