In order to improve the confidence of predictions of future success of this key organism, we seek to characterise its genetic diversity in Australian and Southern Ocean waters by molecular techniques, and resolve the relationship between extensive diversity of coccolith morphotypes and physiological traits.

Using toxic dinoflagellates and bacteria as test organisms, we are critically assessing several proposed treatment options to combat the global environmental problem of ship ballast water mediated aquatic invasions. Treatment options examined include commercial chemical biocides, heat treatment and mid ocean ballast water exchange.

Gymnodinioid plankton dinoflagellates are responsible for widespread mortalities of Australian fish - mechanism is unknown. While some species possess neurotoxins others produce toxic free fatty acids or high levels of reactive oxygen species. We will use a tiered experimental approach progressing from biochemical analyses to Vibrio guided bioassays to histopathology and toxicity trials with fish

This work will focus on culture studies with the dominant stalk forming diatom (canopy height up to 3-4mm) as a function of algal cell density, temperature, light intensity, velocity and nutrients . We will integrate the results with simulated panel experiments in flume tanks at the School of Engineering in order to design successful fouling mitigation strategies.

Diarrhetic shellfish poisoning (DSP) is one of several classes of seafood poisoning caused by accumulation of algal toxins in commercial shellfish. Diarrhetic shellfish poisoning toxins are metabolites produced by selected dinoflagellates of the genera Dinophysis Ehrenberg & Prorocentrum Ehrenberg. Diarrhectic shellfish poisoning poses a threat to the public health and to industry.