Assistant Professor
Marine Organic Geochemistry
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)
  • Erin Malsbury (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
  • Danielle Arnold (IDS undergraduate student 2012-2013)


Graduate Students: 

Patricia M. Medeiros's Selected Publications

Galeron M-A, Radakovitch O, Charrière B, Vaultier F, Volkman JK, Bianchi TS, Ward ND, Medeiros PM, Sawakuchi HO, Tank S et al..  2018.  Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude. Organic Geochemistry. 115:78-92.
Medeiros PM.  2018.  Encyclopedia of Geochemistry: Gas Chromatography-Mass Spectrometry (GC-MS). In: Encyclopedia of Earth Sciences Series. W.H. White (ed.). :pp1-6.
Babcock-Adams L, Chanton JP, Joye SB, Medeiros PM.  2017.  Hydrocarbon composition and concentrations in the Gulf of Mexico sediments in the 3 years following the Macondo well blowout. Environmental Pollution. 229:329-338.
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. 62:1718-1731.
Doherty M, Yager PL, Moran MAnn, Coles VJ, Fortunato CS, Krusche AV, Medeiros PM, Payet JP, Richey JE, Satinsky BM et al..  2017.  Bacterial biogeography across the Amazon River-ocean continuum. Frontiers in Microbiology. 8:882. doi:10.3389/fmicb.2017.00882
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. 11:1852-1864.
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