Mary K. Firestone

Mary K. Firestone is Professor of the Graduate School in the Department of Environmental Science, Policy and Management at UC Berkeley. Her research revolutionized understanding of soil microbial processes, particularly oak regeneration techniques and microbial mediation of carbon/nitrogen cycling in terrestrial ecosystems.

Firestone's work examines microbial responses to environmental change, including drought, rewetting, and warming scenarios. Her lab develops innovative methods like quantitative stable isotope probing (qSIP) to trace microbial activity in complex soil environments. Research spans grassland, rangeland, and agricultural ecosystems.

Honors include election to the National Academy of Sciences (2017), Soil Ecology Society Career Achievement Award (2017), and American Geophysical Union Fellowship (2016). She holds the Betty and Isaac Barshad Chair in Soil Sciences.

Current PhD candidates and postdoctoral researchers in the Firestone Lab investigate viral-bacterial interactions in soil, mycorrhizal carbon transfer, and drought impacts on soil carbon persistence. Field studies at California's Hopland Research Center examine grassland responses to climate variability.