Quantifying Soil Iron Oscillations In Redox Transition Environments: Impacts On Carbon Degradation Rates And Phosphorus Availability

We are recruiting for one PhD and one PostDoc position to work on an interdisciplinary project examining how redox oscillations shape soil iron pools, and how variations in iron cycling alters the pathways of organic carbon sequestration and degradation and phosphorus availability. This project merges advanced mineralogical characterization techniques with unique experimental methods. It integrates (1) two unique types of redox cycling microcosms, (2) a novel 57Fe isotope tracer approach using advanced Mössbauer and multi-collector ICP-MS technology and (3) innovative reaction network modeling within the context of two field sites with well characterized redox gradients. The project includes collaboration with Co-PI’s Christof Meile (UGA-Marine Science), and Michelle Scherer (Univ. of Iowa).

Postdoctoral Scholar:  The postdoctoral scholar (two-years initial funding) will participate in soil sample collection and initiate laboratory soil incubations using of customized redox reactors and chambers. Strong laboratory skills and broad interests in molecular biogeochemistry are a requirement. Applicants should be familiar and reasonably proficient in standard inorganic, organic, and microbial analysis techniques. The ability to work efficiently and independently will be expected. Scientists interested in linking biologically-driven mineral transformations to ecosystem-level processes through advanced geochemical techniques are strongly encouraged to apply. Prior experience with the Fe system is a plus.

PhD Student:  The PhD student (three-years initial funding) will work closely with the post-doc to conduct laboratory soil incubations using of customized redox reactors and chambers. Strong laboratory skills and broad interests in molecular biogeochemistry are a requirement. Applicants should have a MSc. degree in a related geochemistry field. The PhD student will be co-advised by Aaron Thompson in Soil Science and Christof Meile in Marine Science and could obtain a degree through either program, although Soil Sciences is recommended. The ability to work efficiently and independently will be expected.

Location: Athens, GA is a vibrant college town located 90 min south of the Appalachian mountains and 90 min east of Atlanta. The town is perhaps best known for its music scene.

Applications: Electronic applications including a cover letter describing interests and qualifications for the position, a CV, and contact information for three references should be sent to Aaron Thompson (AaronT@uga.edu). We will continue evaluating applications until the positions are filled. Students interested in fall 2010 matriculation should submit materials through the UGA graduate school by January 1, 2010 for best consideration. Exceptional students will be considered for higher stipends through internal fellowships and scholarships.