Tamara Harms Associate Professor Department of Environmental Sciences
Tamara is an ecosystem ecologist and biogeochemist interested in the effects of spatial heterogeneity and hydrologic flowpaths on elemental cycles. She has studied desert riparian zones and streams, urban ecosystems, and boreal and arctic catchments. Current foci include: biogeochemical indicators of ecosystem resilience; responses of carbon, nitrogen, and phosphorus cycles to permafrost thaw; and influences of fire and hydrologic regimes on aridland streams.
Karen Jorgenson B.S., Western Washington University M.S., University of Wyoming Research Scientist (University of Alaska Fairbanks)
Karen has a wealth of field work experience, expertise in analytical chemistry, and statistical skill. She currently works on a NASA ABoVE-funded project modeling discharge regimes of high-latitude rivers using time series approaches.
Jamie Irby B.S., University of Arizona M.S., University of California Riverside Lab manager
Jamie has expertise in soil biogeochemistry and stable isotope approaches. She oversees the lab’s chemical analyses, deftly figures out how to use new instrumentation, manages and analyzes data, pitches in to field work, and keeps our research program going.
Shanthini Ode B.A., Oberlin College M.S. student
Shanthini is studying the interactive effects of fire and precipitation on stream chemistry in Southern California. She also has a wealth of experience in science communication via radio and video.
FORMER LAB MEMBERS
Technicians Else Radeloff
Jessica Czareneki Karen Jorgenson Audrey (Mutschlecner) Krehlik Emily Longano Rachel Willis
Graduate students Jacob Adams (M.S. 2024) — Metabolism of boreal streams Jake Cavaiani (M.S. 2023) — Storm concentration-discharge relationships in boreal streams
Melanie Burnett (M.S. 2021) — Denitrification in boreal soils and sediments Audrey (Mutschlecner) Krehlik (M.S. 2017) — Dissolved organic matter dynamics of high-latitude streams Sarah “Ludda” Ludwig — Biogeochemistry of arctic hillslopes
Rebecca Risser — Nutrient retention on arctic hillslopes
Post-doctoral researchers Rebecca Bellmore (SE AK Watershed Coalition) — Metabolism of desert streams Alex Webster (UNM) — Resilience of boreal catchments to fire and permafrost thaw
Undergraduates James Anderson (LSU) — Biolability of DOC in boreal & arctic streams Kelsey Blake (U Vic) — Water tracks Faith Ciganek (UAF) — Nitrate in groundwater used for drinking in Fairbanks Arianna Cocallas (Beloit College) — High-frequency biogeochemistry of boreal streams
Adela Contreras (UCD) — Fire effects on boreal catchment biogeochemistry Chris Cook (UNC) — Transient storage in arctic water tracks
Michael Folke (ASU) — Trophic dynamics of desert streams Emma Haines (CSUMB) — Benthic organic matter in desert streams Margaret Haney (NCSU) — Nutrient limitation of boreal streams Margit Jaeger (UAF) — Water tracks
Dani Kirsch (SE Missouri St) — Food chain efficiency in desert streams
Stephanie Li (UCSD) — Nutrient limitation in desert streams Jade Morning Sky Little (UCD) — Desert stream invertebrate community dynamics Taylor Saucier (MSU) — Tissue turnover in desert fish Margaret Zahrah (Tufts) — Denitrification in thermokarst lake sediments