Edward Willis-Jones Tambo
My project focuses on the indirect impacts of ecosystem engineering by invasive crayfish species. In particular, I am interested in the potential for crayfish bioturbation (sediment disturbance) to alter important ecosystem properties and processes such as methane and oxygen dynamics, zooplankton community structure and juvenile fish survival. To study this, I manipulate the density and species of crayfish present in a number of experimental mesocosms to generate a gradient of bioturbation (measured as turbidity) against which measurements of these properties and processes can be analysed. Additionally, I conduct enclosure/exclosure experiments on 50m sections of a natural stream system containing the invasive signal crayfish, Pacifastacus leniusculus, to determine how results from the mesocosm studies might upscale to real-world scenarios.
Supervisor: Prof. Mark Trimmer