The PhD in Biosystems and Biodiversity is delivered by the Faculty of Arts and Science. Students in this program are normally supervised by Faculty members in the following contributing departments/areas: Biological Sciences, Chemistry and Biochemistry, and Geography.

Research in this program emphasises the interactions of organisms with both biotic and abiotic components of the environment. Areas of research include animal ecology, plant ecology, microbial ecology, parasitology, molecular systematics, biogeography, physiological ecology, remote sensing, environmental genetics, toxicology, developmental biology, phytochemistry, and plant physiology. In their programs, the researchers use a wide range of techniques to study a wide range of organisms, including animals, plants, bacteria, and fungi. Many research programs include a combination of laboratory and field studies.