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Savanna Soil Carbon: investigating biological climate resilience


Project Description

Savanna ecosystems occupy 20% of the Earth’s land surface and are characterized by open canopied mixed woodland with a grassy understorey and seasonal rainfall in tropical or sub-tropical regions. They are also reservoirs of globally important biodiversity and carbon that are strongly influenced by the combined effects of grazing, fire and climate. Savannas are critical for human livelihoods and wellbeing, with over 1 billion people reliant on resources or services that these landscapes provide. These include the provision of food, fuel and fibre from natural and managed savanna ecosystems. The co-evolution of savannas and humans has occurred over 200,000 years.

Soils underpin the delivery and sustainability of the form and function of these environments with soil biotic communities actively regulating biome scale vegetation dynamics, greenhouse gas emissions, and carbon sequestration. These ancient and valuable systems are, however, under pressure from increasing human activity and over-exploitation and changes in fire and climatic regimes. Together these drivers have the capacity to significantly alter savanna biodiversity and biogeochemical function with implications for dependent human welfare and happiness. Specifically, there is considerable uncertainty regarding the potential individual and interactive impacts of these phenomena on the biological and biogeochemical resilience of the underlying soils.

The aim of this PhD research will be to improve understanding of the individual and interactive effects of grazing, fire and climate change on savanna soil biology, carbon biogeochemistry and resilience to future disturbance. Research will be focused on savanna ecosystems in South Africa that typify sub-tropical seasonal drylands found across the planet.

Student training will ensure specific research and transferable skills development that include; soil ecology and biogeochemistry, microbial molecular techniques, greenhouse gas sampling and analyses, isotope science, experimental design, statistics, scientific writing, research presentation/publication, project management, financial oversight and review, team working, advanced independent learning, working with partners from Witwatersrand and Pretoria Universities in RSA.

Please make enquiries to Prof. Nick Ostle and Prof Kate Parr before making your application.

Funding Notes

The studentship is only available to applicants from the UK and EU.

Each student will be supported by the tax-free stipend (£15,009 in 2019/20), typically for 3.5 years. In addition, for eligible students, the award will cover EU/UK fees.

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