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Caitlin Hodges

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Caitlin Hodges

Assistant Professor


Caitlin Hodges.

chodges@ou.edu

Sarkeys Energy Center, 876

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Caitlin Hodge's Website
Caitlin Hodges CV (pdf)


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.


  • 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

  • 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

  • Biogeochemistry of the Critical Zone
  • Introduction to Physical Geology
  • Earth Resources and the Environment 
  • Soil Genesis 

  • 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 USCatena. doi: 10.1016/j.catena.2019.03.026