Postdoctoral Researchers

Rachel Strickman


Rachel is a postdoctoral researcher working on the fine-scale dynamics of mercury methylation and demethylation in the rice rhizosphere. Rice has relatively recently been identified as a significant dietary source of the more bioavailable and toxic methylated form of mercury, making this work significant to global public health. She completed her PhD in Environmental Science at the University of Toronto, Ontario, where she investigate multiple aspects of methylmercury production, distribution, and trophic transfer in managed wetlands. Rachel completed her B.Sc. at the University of St. Andrews in Scotland, followed by an MSc in Plant Ecology at the University of Helsinki in Finland. When away from the lab, Rachel enjoys traditional crafts, running, and exploring the natural heritage of the Pacific Northwest with her husband and young son.

Contact: email

Graduate Students

Yasmine Farhat


Yasmine received her B.S. from the University of Nebraska at Omaha in 2015, where she double majored in biology and chemistry. During her time at UNO she conducted research on the endocrine disrupting effects of agricultural run-off. Her current project in the hydro-biogeochemistry group looks at the impact of hydro-power development and climate change on the nutritional quality of rice. Outside of work she enjoys swimming, traveling, cooking and listening to public radio.

Contact: email

Samantha Fung


Samantha joined the hydro-biogeochemistry group in April 2018. She is investigating both the biogeochemical and physical processes involved with arsenic cycling in urban lakes located in the South-Central Puget Sound Lowland region. Samantha received her B.S. from UCLA, where she studied Environmental Engineering and Hydrology and worked on a research project identifying Mercury sources in the Los Angeles water system. When not doing research, she enjoys backpacking, climbing, baking and working at the farmers market.

Contact:  email

Joel EkLof


Joel received his B.S. in physics from the University of Puget Sound in 2016, where he conducted biophysics research on the fluid mechanics of splash-cup plants. As part of the hydro-biogeochemistry group, he is investigating the effects of rapid permafrost thaw on carbon dioxide and methane fluxes in Alaska. Outside of research, Joel enjoys mountain biking, climbing, backpacking, skipping rocks, and hammocking across the beautiful Pacific Northwest.

Contact: email



Undergraduate Students

Sarah Larson


Sarah is an undergraduate student working towards a B.S. in Plant Biology and a minor in Environmental Science & Resource Management. Sarah joined the hydro-biogeochemistry group in January 2018, and is particularly interested in improving the sustainability of our agricultural systems. Outside of school, she enjoys fly fishing, cooking, hiking, and going to estate sales.





Evan Lester

Evan is a undergraduate student working towards a B.S. in the Civil Engineering. He joined the group in February 2018 and is researching effects of climate change on arsenic content in rice. Growing up in the pacific northwest has provided Evan with a great love of hiking, climbing, and of course the rain.




Colin Kolbus


Colin is an undergraduate student pursuing a degree in Environmental Engineering with minors in Chemistry and Applied Math. In June 2019, he started work in the Neumann Lab helping with chemical analysis specifically with the ICP MS. Catch him outside the lab giving a campus tour to perspective students of UW. In his free time, he enjoys running and generally being outside. Fun fact: he ferments his own kombucha!

Catherine Ikeda


Catherine is an undergraduate student working towards a B.S. in Chemistry and a minor in Earth & Space Sciences. She joined the hydro-biogeochemistry group in June 2019 and is researching the effects of climate change on rice grain quality. In her free time, Catherine enjoys hiking, kayaking, dogs, and cooking, as well as the occasional TV show binge.