Ph.D., 2021 Soil Science and Biogeochemistry – Pennsylvania State University
M.S., 2017 Ecology – University of Georgia
B.S.E.S. 2014 Water and Soil Resources – University of Georgia
Office: SEC 876
Email: chodges@ou.edu
Caitlin Hodges CV (pdf)
Caitlin Hodges
Faculty Page
Research
My research focuses on the interface between soil science and biogeochemistry. I pursue fundamental research in soil carbon cycle- mineral weathering feedbacks and redox cycling in upland soils. I am particularly fascinated by low-oxygen processes in well-drained upland soils. I use this fundamental research on soils to understand the role soils play in modulating the global carbon cycle and terrestrial inputs (pollutant fertilizers, heavy metals, etc.) to surface waters.
I use both manipulated laboratory experiments and in situ monitoring of instrumented watersheds to pursue my research questions.
Areas of Interest
Soil weathering, soil carbon cycle, iron and manganese redox, mineral organic carbon associations, low oxygen processes in soils, interpretation of soil CO2 and O2 concentrations
Courses Taught
GEOL 1114 - Introduction to Physical Geology (Fall)
GEOL 3033 - Earth Resources and the Environment (Spring)
GEOL 4663/5663 - Biogeochemistry of the Critical Zone (alternates, Fall)
GEOL 4970/5970 - Soil Genesis (alternates, Fall)
Selected Publications
Legg, T., & Hodges, C. (2024). Towards a community-engaged framework for sampling urban soils. In Review, Soil Science Society of America Journal
Hodges, C., Araujo, P. I., Hess, L. J., Vivanco, L., Kaye, J., & Austin, A. T. (2023). Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes. Geoderma, 440, 116718.
Hodges, C. A., Regan, J., Forsythe, B., Oakley, D., Kaye, J., Brantley, S. (2023). Using fixed-potential electrodes to quantify iron and manganese redox cycling in upland soils. Biogeochemistry. https://doi.org/10.1007/s10533-022-01012-9.
Hodges, C., Brantley, S. L., Sharifironizi, M., Forsythe, B., Tang, Q., Carpenter, N., & Kaye, J. (2021). Soil carbon dioxide flux partitioning in a calcareous watershed with agricultural impacts. Journal of Geophysical Research: Biogeosciences, 126(10), e2021JG006379.
Hodges, C., H. Kim, S. L. Brantley, J. Kaye. (2019). Soil CO2 and O2 concentrations illuminate the relative importance of weathering and respiration to seasonal soil gas fluctuations. Soil Science Society of America Journal. doi: 10.2136/sssaj2019.02.0049
Hodges, C., J. Mallard, D. Markewitz, A. Thompson. (2019). Seasonal and spatial variability of iron reduction in the soils of the Southeastern Piedmont of the US. Catena. doi: 10.1016/j.catena.2019.03.026
