Sarah L. O’Brien

Argonne, Postdoc,
- Assistant Environmental Microbiologist, Biosciences Division
- Dion Antonopoulos Laboratory, Argonne National Laboratory

Contact Information

Argonne National Laboratory
9700 S. Cass Avenue
Bldg 202, Room A-329
Argonne, IL 60439

Phone: (630) 252 7854
Email: .(JavaScript must be enabled to view this email address)


Dr. O’Brien joined the IGSB in February 2010.  She is interested in a range of belowground processes related to soil organic matter (SOM) cycling in a changing climate.  Her Ph.D. research was jointly advised by Miquel Gonzalez-Meler (University of Illinois at Chicago) and Julie Jastrow (Argonne National Laboratory), and focused on mechanistic controls on the rate and duration of SOM accumulation in restored perennial grasslands, especially the physical and chemical protection mechanisms that stabilize SOM.  Her postdoctoral research will expand on that theme by exploring the microbial processes that underpin the SOM dynamics observed over the landscape.  She will combine lab and field studies with next-generation molecular methods to link microbial community structure and function to SOM dynamics and the global carbon cycle.

Research Papers