Xavier is a marine molecular ecologist in the Coastal & Freshwater group at Cawthron Institute and an Associate Professor at the Institute of Marine Science of the University of Auckland. His research expertise focuses on developing multi-trophic molecular detection tools to analyse environmental DNA (eDNA) and measure biodiversity changes associated with natural and human-induced stressors in aquatic ecosystems. Xavier is involved in multiple research programmes using DNA and RNA proxies for monitoring New Zealand’s aquatic health (e.g. Lakes380), emerging contaminants such as organics and microplastics, non-indigenous marine species (Marine Biosecurity Toolbox), and benthic impacts associated with aquaculture. Xavier is very passionate about his research and particularly enjoys interacting with the general public as well as regulators and industry partners, to find better ways of protecting our aquatic ecosystems.