My research focuses on the intersection between health and earth and environmental sciences (aka, GeoHealth; see Figure on the right). I focus on investigating the sources, transport, and fate of chemicals in aquatic ecosystems that pose risks to human and ecological health.  I am interested in applications for geochemical tools in both environmental science and biomedical research.



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1. Exploring the ocean life of pacific salmon.


Collaborators: Dominique Weis (UBC), Brian Hunt (UBC), Wade Smith (UBC), Evgeny Pakhomov (UBC).


Description:  We are reconstructing the history of ocean life for for various salmon stocks, including dietary composition, geographic location of feeding grounds, and migration timing, using both light (e.g., carbon, nitrogen, sulfur) and heavy  isotope tracers (e.g., mercury, strontium, lead).








2. Global flows of methylmercury from fisheries harvests.


Collaborators: Colin Thackray (Harvard), Elsie Sunderland (Harvard), Vicky Lam (UBC), William Cheung (UBC).


Description: This work links previously modeled Hg deposition into the ocean and seawater reservoirs of Hg species to MeHg flows associated with harvests of commercially important fish stocks. In addition, we simulate essential fatty acid flows from fish in the global oceans to humans for evaluating risks and benefits of seafood consumption.









3. Mechanistic understanding on methylmercury metabolism in marine mammals by mercury stable isotope.


Collaborators: Alicia Juang (Harvard), Clifton Dassuncao (Harvard), Elsie Sunderland (Harvard), Maria Dam (Environmental Agency, Faroe Islands), Katrin Hoydal (Environmental Agency, Faroe Islands), Bjarni Mikkelsen (Faroese Museum of Natural History), David Krabbenhoft (USGS), Runsheng Yin (U of Wisconsin, Madison)


Description: We are developing a toxicokinetic model parameterized by analytical measurements of total Hg, MeHg and stable Hg isotope in seven types of organs from the same pilot whale individuals.


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