Martin Tsz-Ki Tsui

Martin Tsz-Ki Tsui

Assistant Professor

(336) 256-0087
306 Sullivan Science Building


Ecotoxicology and biogeochemistry of environmental pollutants.


Ph.D., University of Minnesota


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.

Recent Publications:

A list of full publications and citations.

Kritee K, Motta LC, Blum JD, Tsui MTK, Reinfelder JR (2017) Photo-microbial mass independent fractionation of mercury in a marine microalga. ACS Earth and Space Chemistry (in press)
Creswell JE, Rattonetti HF, Carter A, Saffari M, Chen B, Tsui MTK, Braaten V, DeWild J, Živkovič I (2016) Assessing bias in total mercury results after removing a subsample from the bottle. International Journal of Environmental Analytical Chemistry 96: 1038-1047.
Donovan PM, Blum JD, Singer MB, Marvin-DiPasquale M, Tsui MTK (2016) Isotopic composition of inorganic and methylmercury downstream of historical gold mining. Environmental Science and Technology 50: 1691-1702.
Kwon SY, Blum JD, Nadelhoffer KJ, Dvonch JT, Tsui MTK (2015) Isotopic study of mercury sources and transfer between a freshwater lake and adjacent forest food web. Science of the Total Environment 532: 220-229.
Balogh SJ, Tsui MTK, Blum JD, Matsuyama A, Woerndle GE, Yano S, Tada A (2015) Tracking the fate of mercury in the fish and bottom sediments of Minamata Bay, Japan,using stable mercury isotopes. Environmental Science and Technology 49: 5399-5406.
Tsui MTK, Blum JD, Finlay JC, Balogh SJ, Nollet YH, Palen WP, Power ME (2014) Variation in terrestrial and aquatic sources of methylmercury in stream predators as revealed by stable mercury isotopes. Environmental Science and Technology 48: 10128-10135.


BIO 431: Biosphere
BIO 488: Essentials of Toxicology
BIO 520: Ecosystem Ecology & Biogeochemistry
BIO 636: Ecotoxicology
BIO 731: Environmental Health Sciences I: Ecosystems to Individuals