Postdoctoral Researchers

Pam Barrett


Pam is now a postdoctoral researcher at The Australian National University studying trace element and isotope cycling in the ocean. She was trained as a chemical oceanographer, but as a member of the Hydro-biogeochemistry group (fall 2015 to spring 2018) she worked in freshwater systems investigating arsenic mobility and bioaccumulation in impacted urban lakes.


Colby Moorberg

Colby is now an Assistant Professor in the Department of Agronomy at Kansas State University. He is a soil scientist with interest in soil-root interactions. Colby joined the Hydro-biogeochemistry group as a postdoctoral researcher from January of 2014 to January 2015 to investigate effect of plant roots on methane oxidation in boreal wetlands in Alaska. Contact: website

Javier Espeleta

Javier is now a consultant in Costa Rica. He joined the Hydro-biogeochemistry group from January 2013 to August 2015. He investigated how plant hydraulic redistribution of water and nighttime transpiration influences nutrient cycling in the soil zone surrounding plant roots (i.e., the rhizosphere).

Graduate Students

Nick Waldo


Nick Waldo completed his PhD in June 2019 and is now a consultant for Pacific Groundwater Group. His thesis was titled, “A rhizosphere-scale investigation of root effects on wetland methane dynamics.”

Lara Pracht

Lara Pracht completed her PhD in November 2016 and is now a Laboratory Resource Coordinator at Oregon Institute of Technology. Her thesis was titled, "Arsenic contaminated groundwater: exploration of the role of organic carbon in mobilization processes and evaluation of mechanisms of arsenic sequestration by in situ treatment systems." 

Farnaz Aslkhodapasand

Farnaz completed her master's degree in November 2016 and is now a Staff Water Resources Engineer at Cardno. Her thesis was titled, "Integration of dynamic rhizospheric methane oxidation into a process-based methane emissions model."

Andrea Wong

Andrea now works for King County mapping stormwater. She was involved with field efforts researching the effects of plants on methane emissions from Alaskan wetlands while working towards her non-thesis based MSCE degree, which she completed in 2016. 

Lab Technicians

Olivia Hargrave

Olivia joined the Hydro-biogeochemistry group in June 2016 as a Civil and Environmental Engineering undergraduate, and she continued working in the group after graduation as a laboratory technician. She left in 2018 to work as a consultant for Integral Consulting Inc. 

Jesse Turner


Jesse joined the hydro-biogeochemistry group in summer of 2016 after graduating from UW as an undergraduate. He spent the summer in Alaska collecting data on the relationship between climate change and methane emissions in wetlands and spent the following 9 months in Seattle analyzing the field data. He is now working for SMRU consulting.

Jen Teshera-Levye

Jen was a research technician in the hydro-biogeochemistry group for two years. She left in 2013 to pursue a PhD at the University of Minnesota in the Department of Ecology, Evolution and Behavior.