Seminar by Assoc. Prof. Douglas Brumley

Nutrient transport in dynamic microenvironments

Douglas Brumley, Associate Professor from the University of Melbourne, Australia

The capacity for organisms to exchange nutrients with one another and their surroundings underpins microbial symbioses, biogeochemical cycling in the ocean, and the healthy functioning of corals. Here, we explore three-dimensional active transport by ciliary arrays around coral surfaces, using a combination of mathematical modelling, non-invasive measurements of ciliary distributions, and quantification of flow fields and spatial oxygen profiles. We also examine how individual bacteria are capable of exchanging nutrients through chemotactic tracking of fine-scale chemical trails exuded by cells and highlight how nutrient transport and chemical partnerships are influenced by fluid flows.