Assistant Professor
Marine Organic Chemistry
160 Marine Sciences Bldg.
Office Phone:  (706) 542-6744
165/167 Marine Sciences Bldg.
Lab Phone: 
(706) 542-6798


Ph.D. 2006, Oregon State University (Environmental Sciences - Chemical Oceanography)

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- and photo-induced changes in DOM composition.

See complete list of publications here.


Medeiros Lab People:

  • Maria Letourneau (Ph.D. student; see link below)
  • V. Ruth Pannill (IDS undergraduate student)
  • Sylvia Schaefer (Research Associate)

Medeiros Lab Alumni:

  • Michael Seidel (Postdoc 2012-2015) - Now: Postdoc at ICBM, University of Oldenburg, Germany
  • Ding He (Postdoc 2014-2016) - Now: Assistant Professor at Zhejiang University, China
  • Lydia ('Meg') Babcock-Adams (M.S. student 2013-2016) - Now: Ph.D. student at MIT/WHOI Joint Program
Graduate Students: 

Patricia M. Medeiros's Selected Publications

Satinsky BM, Smith CB, Sharma S, Landa M, Medeiros PM, Coles VJ, Yager PL, Crump BC, Moran MAnn.  2017.  Expression patterns of elemental cycling genes in the Amazon River Plume. The ISME Journal. In press
Medeiros PM, Babcock-Adams L, Seidel M, Castelao RM, Di Iorio D, Hollibaugh JT, Dittmar T.  2017.  Export of terrigenous dissolved organic matter in a broad continental shelf. Limnology and Oceanography. In press
John DL, Medeiros PM, Babcock-Adams L, Walker SE.  2017.  Cambrian trilobites as archives for anthropocene biomarkers and other chemical compounds. Anthropocene. 17:99-106.
Medeiros PM, Seidel M, Gifford SM, Ballantyne F, Dittmar T, Whitman WB, Moran MAnn.  2017.  Microbially-mediated transformations of estuarine dissolved organic matter. Frontiers in Marine Science. 4:69. doi: 10.3389/fmars.2017.00069
Ward ND, Bianchi TS, Medeiros PM, Seidel M, Richey JE, Keil RG, Sawakuchi HO.  2017.  Where carbon goes when water flows: Carbon cycling across the aquatic continuum. Frontiers in Marine Science (Review article). 4:7. doi:10.3389/fmars.2017.00007
Seidel M, Dittmar T, Ward ND, Krusche AV, Richey JE, Yager PL, Medeiros PM.  2016.  Seasonal and spatial variability of dissolved organic matter composition in the lower Amazon River. Biogeochemistry. 131:281-302.
Craft C., Herbert E., Li F., Smith D., Schubauer-Berigan J., Widney S., Angeline C., Pennings S., Medeiros P.M., Byers J. et al..  2016.  Climate change and the fate of coastal wetlands. Wetland Science & Practice. 33(3):70-73.
Medeiros PM, Seidel M, Niggemann J, Spencer RGM, Hernes PJ, Yager PL, Miller WL, Dittmar T, Hansell DA.  2016.  A novel molecular approach for tracing terrigenous dissolved organic matter into the deep ocean. Global Biogeochemical Cycles. 30:689-699.
Seidel M, Kleindienst S, Dittmar T, Joye SB, Medeiros PM.  2016.  Biodegradation of crude oil and dispersants in deep seawater from the Gulf of Mexico: Insights from ultra-high resolution mass spectrometry. Deep Sea Research Part II: Topical Studies in Oceanography. 129:108-118.