Post-Doctoral Fellows

Selden, Corday

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  • Position: Postdoctoral Associate
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  • Office: DMCS Room 303B
  • Research Interests: biogeochemistry, climate feedbacks, marine nitrogen/carbon cycling, isotope metallomics, microbe-metal interactions, microbial metabolism
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Research Interest Statement

I’m a biogeochemist with expertise in stable isotope geochemistry and molecular biology. My work centers on the reciprocal dynamics between microbes and their physicochemical environment, how these dynamics shape the Earth system, and the imprints they impart. Currently, I’m exploring the mechanisms which underpin biological fractionation of stable metal isotopes (e.g., Cu, Zn, Ni). This work is pivotal to developing metal isotopes as tools for tracking microbial metabolism in modern and ancient environments. As a graduate student at Old Dominion University, I studied the environmental factors regulating the activity of metabolically-diverse N2-fixing microbes. This work has bearing on our understanding of the homeostatic feedbacks within the modern nitrogen cycle, which exert a profound influence over Earth’s climate.


Selden, C.R.*, Einarsson, D.*, Lowry, K., Crider, K., Pickart, R., Ashjian, C. & Chappell, P. D. (2022). Coastal upwelling enhances abundance of a symbiotic diazotroph (UCYN-A) and its host in
the Arctic Ocean. Frontiers in Marine Sciences, 9:877562.

Confesor, K., Selden, C.R., Powell, K., Donahue, L., Mellett, T., Caprara, S., Knapp, A., Buck, K., Chappell, P.D. (2022). Defining the realized niche of two major clades of Trichodesmium: A study on
the West Florida Shelf. Frontiers in Marine Science, 9:821655.

Ghosh, A., Robinson, A., Chiapella, A., Bertolet, B., Selden, C.R., Perry, D., Reich, H., Oleksy, I., Isanta-Navarro, J., Aho, K., Ganley, L., Soares, L., Heffernan, L., Peleg, O., Ramulifho, P., Thibodeau,
P., Reis, P., Sasaki, M., Ray, N., Maher, R., LaBrie, R., Spier, S. (2022). Eco-DAS: an effective platform for developing professional collaborations among early career aquatic scientists. Limnology & Oceanography Bulletin.

Amergian, K.E., Beckwith, S., Gfatter, G., Selden, C.R. & Hallock, P. (2022). Can areas of high alkalinity fresh-water discharge provide a potential refugia for marine calcifying organisms? Journal of Foraminiferal Research, 52(1), p. 60-73.

Selden, C.R., Mulholland, M., Bernhardt, P., Widner, B. & Jayakumar, A. (2021). Towards resolving disparate accounts of the extent and magnitude of nitrogen fixation in the Eastern Tropical South Pacific oxygen deficient zone. Limnology & Oceanography, 66(5): p. 1950-1960.

Macías-Tapia, A., Mulholland, M.R., Selden, C.R., Loftis, D. & Bernhardt, P. (2021). Effects of tidal flooding on estuarine biogeochemistry: quantifying flood-driven nitrogen inputs in a lower Chesapeake Bay sub-tributary. Water Research, 201, 117329.

Oliver, H., Zhang, W.G., Smith, W.O., Alatalo, P., Chappell, P.D., Hirzel, A., Selden, C.R., Sosik, H.M., Stanley, R.H.R., Zhu, Y., & McGillicuddy, D.J. (2021). Diatom hotspots driven by western
boundary current instability. Geophysical Research Letters, 48(11): e2020GL091943. 

Selden, C.R., Chappell, P.D., Clayton, S., Macías-Tapia, A., Bernhardt, P. & Mulholland, M. (2021). A coastal N2 fixation hotspot at the Cape Hatteras front: Elucidating spatial heterogeneity in diazotroph activity via supervised machine learning. Limnology & Oceanography, 66(5), p. 1832-1849.

White, A., Granger, J., Selden, C.R., Gradoville, M.R., Potts, L., Bourbonnais, A., Fulweiler, R.W., Knapp, A., Mohr, W., Moisander, P., Tobias, C., Wilson, S., Benavides, M., Bonnet, S., Mulholland, M.
& Chang, B. (2020). A critical review of the 15N2 tracer method to measure diazotrophic production in pelagic ecosystems. Limnology & Oceanography: Methods, 18(4), p. 129-147.

Selden, C.R., Mulholland, M., Bernhardt, P., Widner, B., Macías-Tapia, A., Ji, Q. & Jayakumar, A. (2019). Dinitrogen fixation across physico-chemical gradients of the Eastern Tropical North Pacific oxygen deficient zone. Global Biogeochemical Cycles, 33(9), p. 1187-1202.

Mulholland, M., Bernhardt, P., Widner, B., Selden, C.R., Chappell, D., Mannino, A., Hyde, K. & Clayton, S. (2019). High rates of N2 fixation in temperate, western North Atlantic coastal waters
expands the realm of marine N2 fixation. Global Biogeochemical Cycles, 33(7), p. 826-840.