Patricia Medeiros, Assistant Professor
Research Emphasis:
Organic and isotope geochemistry. Sources, transport, alterations and fate of organic compounds in aquatic and atmospheric environments. Molecular characterization of marine/estuarine dissolved organic matter (DOM). Microbial-induced changes in DOM composition.
GCE Committees:
SALTEx Experiment Committee
Contact Information:
Primary Organization: University of Georgia
Mailing Address:
Dr. Patricia M. Medeiros
Department of Marine Sciences
UGA Marine Sciences Building
University of Georgia
Athens, Georgia 30602-3636
Office Phone: (706) 542-6744
FAX Number: (706) 542-5888
E-Mail: medeiros@uga.edu
Web Page: http://www.marsci.uga.edu/directory/patricia-m-medeiros
Other Identity Systems:
ORCID: orcid.org/0000-0001-6818-2603
GCE Data Sets:
ORG-GCED-2208 (DOM composition in Altamaha River and Sapelo Sound estuaries measured by FT-ICR mass spectrometry in 2017 (April, July, October) and 2018 (January and October))
ORG-GCET-1904 (DOM composition changes in Altamaha River and Sapelo Sound estuaries measured by FT-ICR mass spectrometry from September 2015 to September 2016)
ORG-GCED-1508 (Dissolved Organic Matter Composition in Doboy Sound and the Altamaha River near Sapelo Island, Georgia in 2012-2013)
ORG-GCED-1703 (Microbially-Mediated Transformations of Estuarine Dissolved Organic Matter from Doboy Sound, Sapelo Sound and the Altamaha River near Sapelo Island, Georgia in 2012-2013)
ORG-GCED-1801 (Seasonal Evolution of Terrigenous Dissolved Organic Matter in the South Atlantic Bight off Georgia in 2014)
GCE Publications and Presentations: (custom bibliography)
Journal Articles
Reimer, J.J., Medeiros, P.M., Hussain, N., Gonski, S.F., Xu, Y.Y., Huang, T.H. and Cai, W.-J. 2023. Carbonate chemistry and the potential for acidification in Georgia coastal marshes and the South Atlantic Bight, USA. Estuaries and Coasts. (DOI: 10.1007/s12237-023-01261-3) (in press)
Letourneau, M.L., Schaefer, S.C., Chen, H., McKenna, A.M., Alber, M. and Medeiros, P.M. 2021. Spatio-temporal changes in dissolved organic matter composition along the salinity gradient of a marsh-influenced estuarine complex. Limnology & Oceanography. 66:3040-3054. (DOI: 10.1002/lno.11857)
Martineac, R.P., Vorobev, A., Moran, M.A. and Medeiros, P.M. 2021. Assessing the contribution of seasonality, tides, and microbial processing to dissolved organic matter composition variability in a Southeastern U.S. estuary. Frontiers in Marine Science. 8:781580. (DOI: 10.3389/fmars.2021.781580)
Letourneau, M.L., Hopkinson, B.M., Fitt, W.K. and Medeiros, P.M. 2020. Molecular composition and biodegradation of loggerhead sponge Spheciospongia vesparium exhalent dissolved organic matter. Marine Environmental Research. 162:105130. (DOI: 10.1016/j.marenvres.2020.105130)
Roebuck, J., Medeiros, P.M., Letourneau, M.L. and Jaffe, R. 2018. Hydrological controls on the seasonal variability of dissolved and particulate black carbon in the Altamaha River, GA. Journal of Geophysical Research - Biogeosciences. 123:3055-3071. (DOI: 10.1029/2018JG004406)
Vorobev, A., Sharma, S., Yu, M., Lee, J., Washington, B., Whitman, W., Ballantyne, F., Medeiros, P.M. and Moran, M.A. 2018. Identifying labile DOM components in a coastal ocean through depleted bacterial transcripts and chemical signals. Environmental Microbiology. 20:3012-3030. (DOI: 10.1111/1462-2920.14344)
Medeiros, P.M., Babcock-Adams, L., Seidel, M., Castelao, R., Di Iorio, D., Hollibaugh, J.T. and Dittmar, T. 2017. Export of terrigenous dissolved organic matter in a broad continental shelf. Limnology & Oceanography. 62:1718-1731. (DOI: 10.1002/lno.10528)
Medeiros, P.M., Seidel, M., Gifford, S., Ballantyne, F., Dittmar, T., Whitman, W.B. and Moran, M.A. 2017. Microbially-mediated transformations of estuarine dissolved organic matter. Special Issue: Integrative Research on Organic Matter Cycling Across Aquatic Gradients. Frontiers in Marine Science. 4(69). (DOI: 10.3389/fmars.2017.00069)
Conference Posters and Presentations
Martineac, R.P. and Medeiros, P.M. 2021. Presentation: Which biogeochemical drivers most impact DOM composition of a marsh-dominated estuary? American Chemical Society 2021 Fall Meeting, August 2021, Atlanta, GA.
Martineac, R.P., Vorobev, A., Moran, M.A. and Medeiros, P.M. 2021. Presentation: Environmental drivers controlling DOM composition variability in a marsh-dominated estuary. ASLO 2021 Aquatic Sciences Virtual Meeting, June 2021.
Martineac, R.P. and Medeiros, P.M. 2020. Poster: What controls DOM composition variability in marsh-dominated estuaries? Ocean Sciences Meeting, February 2020, San Diego, CA.
Letourneau, M.L., Schaefer, S.C., Alber, M. and Medeiros, P.M. 2019. Poster: Spatio-temporal changes in dissolved organic matter composition and biodegradation throughout the GCE-LTER domain. 25th Coastal and Estuarine Research Federation (CERF) Conference, November 2019, Mobile, AL.
Martineac, R.P., Craft, C.B. and Medeiros, P.M. 2019. Poster: Effects of simulated seawater intrusion on soil biomarkers distribution in a tidal freshwater marsh wetland. 25th Coastal and Estuarine Research Federation (CERF) Conference, November 2019, Mobile, AL.
Medeiros, P.M. 2019. Presentation: What controls dissolved organic matter composition in marsh-dominated estuaries? Southeastern Regional Meeting of the American Chemical Society (SERMACS), October 2019, Savannah, GA.
Medeiros, P.M. and Letourneau, M.L. 2019. Poster: Seasonal changes in dissolved organic matter composition in the Altamaha River, Georgia, USA. ASLO 2019 Aquatic Sciences Meeting, February 2019, San Juan, PR.
Meile, C., Schalles, J.F., Peterson, R.N., O'Donnell, J., Bice, K., Medeiros, P.M., Di Iorio, D., Hopkinson, C.S., Joye, S.B., Stegen, J., Goldman, A., Thomle, J. and Danczak, R. 2019. Presentation: Flow and short- and long-term carbon dynamics at tidally impacted coastal interfaces in the SE USA. Goldschmidt Conference, August 18-23, 2019, Barcelona.
Letourneau, M.L., Schaefer, S.C. and Medeiros, P.M. 2018. Poster: Temporal and spatial assessments of dissolved organic matter composition and biodegradation throughout the Georgia Coastal Ecosystem LTER domain. Gordon Research Conference - Organic Geochemistry, August 2018, Holderness, NH.
Roebuck, J., Medeiros, P.M., Letourneau, M.L. and Jaffe, R. 2018. Poster: Hydrological controls on the seasonal variability of dissolved and particulate black carbon in the Altamaha River, GA. Ocean Sciences Meeting, February 2018, Portland, OR.
Letourneau, M.L. and Medeiros, P.M. 2017. Poster: The influence of hydrology on dissolved organic matter composition and degradation in the Altamaha River and Estuary. ASLO 2017 Aquatic Science Meeting, March 2017, Honolulu, Hawaii.
Letourneau, M.L., Pannill, V. and Medeiros, P.M. 2017. Poster: Temporal changes in dissolved organic matter composition in a marsh-dominated estuary: insights from optical and FT-ICR MS analyses. 4th Annual Southeastern Biogeochemistry Symposium, April 2017, Athens, GA.
Pannill, V., Letourneau, M.L. and Medeiros, P.M. 2017. Poster: Assessing the export of terrigenous dissolved organic matter in the South Atlantic Bight using CDOM analysis: 2014 and 2016 cruises. 4th Annual Southeastern Biogeochemistry Symposium, April 2017, Athens, GA.
Letourneau, M.L., Pannill, V., Babcock-Adams, L. and Medeiros, P.M. 2016. Presentation: Dissolved organic matter composition and processing in the Altamaha River and Estuary: The influence of hydrology. Goldschmidt Conference, June 2016, Yokohama, Japan.
Smith, D., Herbert, E., Li, F., Widney, S., Desha, J., Schubauer-Berigan, J.P., Pennings, S.C., Angelini, C., Medeiros, P.M., Byers, J., Alber, M. and Craft, C.B. 2016. Poster: Seawater Addition Long Term Experiment (SALTEx). Georgia Department of Natural Resources Coastal Resources Division 2016 Climate Conference, November 2-3, 2016, Jekyll Island, GA.
