Professor Davidson is a marine scientist whose career began in physics before a growing fascination with phytoplankton steered his research toward ocean biology. His work explores marine microbes and biogeochemical processes, particularly the factors that shape cell growth, species interactions and the cycling of carbon and nutrients in open‑ocean ecosystems. Keith’s current focus is harmful algal blooms (HABs), studying how physical, chemical and biological conditions drive their development. His research underpins the creation of predictive models and risk‑assessment tools that provide early warning of HAB events, supporting aquaculture, environmental regulators and public health protection.