Martin Tsz-Ki Tsui

I study mercury cycling in inland habitats including stream and river, lake, wetland and forest. Mercury is a highly toxic metal, but it is present in all ecosystem types due to long-range atmospheric transport and deposition. I use concentration and speciation analyses to quantify the levels of mercury present in different types of environmental matrices including water, sediment, soil and biota. I also use a newly developed technique that can measure stable isotope ratios of mercury to better understand the sources and transformation of mercury in the environment. By combining concentration/speciation and isotopic analyses, I have recently shown that it is feasible to decipher the sources of methylmercury (bioavailable form of mercury) in predatory wildlife including insects, fish, and birds, which presents a totally new approach of resolving complexities of mercury bioaccumulation as well as food web dynamics. In addition, I am interested in studying the toxicity and cycling of other pollutants such as heavy metals, pesticides and organic chemicals in the environment.

There are 2 included publications by Martin Tsz-Ki Tsui :

TitleDateViewsBrief Description
Controls of Methylmercury Bioaccumulation in Forest Floor Food Webs 2019 126 Compared to the extensive research on aquatic ecosystems, very little is known about the sources and trophic transfer of methylmercury (MeHg) in terrestrial ecosystems. In this study, we examine energy flow and trophic structure using stable carbon (...
Variation in Terrestrial and Aquatic Sources of Methylmercury in Stream Predators as Revealed by Stable Mercury Isotopes 2014 707 Mercury (Hg) is widely distributed in the environment, and its organic form, methylmercury (MeHg), can extensively bioaccumulate and biomagnify in aquatic and terrestrial food webs. Concentrations of MeHg in organisms are highly variable, and the sou...