Marine Biogeochemistry @ UD

Home of Sunita Shah Walter’s Research Group



For the most up-to-date list of publications, please visit Google Scholar.

Trembath-Reichert, E., Shah Walter, S.R., Fontánez Ortiz, M.A., Carter, P.D., Girguis, P.R., Huber, J.A. (2021) Multiple carbon incorporation strategies support microbial survival in cold subseafloor crustal fluids. Science Advances, 7, eabg0153.

LaRowe, D.E., Arndt, S., Bradley, J.A., Estes, E.R., Hoarfrost, A., Lang, S.Q., Lloyd, K.G., Mahmoudi, N., Orsi, W.D., Shah Walter, S.R., Steen, A.D., Zhao, R. (2020) The fate of organic carbon in marine sediments – new insights from recent data and analysis. Earth-Science Reviews, 204, 103146.

Kusch, S., Shah Walter, S. R., Hemingway, J. D., Pearson A. (2018) Improved chromatography reveals multiple new bacteriohopanepolyol isomers in marine sediments. Organic Geochemistry 124, 12-21.

Hemingway, J. D., Kusch, S., Shah Walter, S. R., Polik, C. A., Elling, F. J., Pearson, A. (2018) A novel method to measure the 13C composition of intact bacteriohopanepolyols. Organic Geochemistry 113, 144-147.

Shah Walter S. R., Jaekel U., Osterholz H., Fisher A. T., Huber J. A., Pearson A., Dittmar T., Girguis P.R. (2018) Microbial decomposition of marine dissolved organic matter in cool oceanic crust. Nature Geoscience 11, 334-339.

Pearson, A., Hurley, S.J., Shah Walter, S.R., Kusch, S. Lichtin, S., Zhang, Y.G. (2016) Stable carbon isotope ratios of intact GDGTs indicate heterogeneous sources to marine sediments. Geochimica et Cosmochimica Acta 181, 18-35. doi: 10.1016/j.gca.2016.02.034.

Gospodinova, K., McNichol, A.P., Gagnon, A.R., Burton, J. Shah Walter, S.R. (2015) Rapid Extraction of Dissolved Inorganic Carbon from Seawater and Groundwater Samples for Radiocarbon Dating. Limnology and Oceanography Methods, 14, 24-30. doi: 10.1002/lom3.10066.

Shah Walter, S.R., Gagnon, A.R., Roberts, M.L., McNichol, A.P., Lardie Gaylord M.C., Klein, E. (2015) Ultra-microscale radiocarbon analysis at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) Facility. Radiocarbon, 57 (1), 109-122. doi: 10.2458/azu_rc.57.18118

Schouten, S., Hopmans, E.C., Rosell-Melé, A., Pearson, A., Adam, P., Bauersachs, T., Bard, E., Bernasconi, S.M., Bianchi, T.S., Brocks, J.J., Carlson, L.T., Castaneda, I.S., Derenne, S., Selver, A. D., Dutta, K., Eglinton, T.I., Fossse, C., Galy, V., Grice, K., Hinrichs, K.U., Huang, Y., Huguet, A., Huguet, C., Hurley, S., Ingalls, A.E., Jia, G., Keely, B., Knappy, C., Kondo, M., Krishnan, S., Lincoln, S., Lipp, J., Mangelsdorf, K., Martinez-Garcia, A., Menot, G., Mets, M., Mollenhauer, G., Ohkouchi, N., Ossebaar, J., Pagani, M., Pancost, R.D., Pearson, E.J., Peterse, F., Reichart, G.J., Schaffer, P., Schmitt, G., Schwark, L., Shah, S.R., Smith, R.W., Smittenberg, R.H., Summons, R.E., Takano, Y., Talbot, H.M., Taylor, K.W.R., Tarozo, R., Uchida, M., van Dongen, B.E., Van Mooy, B.A.S., Wang, J., Warren, C., Weijers, J.W.H., Werne, J. Woltering, M., Xie, S., Yamamoto, M., Yang, H., Zhang, C.L., Zhang, Y., Zhao, M., Sinninghe Damste, J.S. (2013) An interlaboratory study of TEX86 and BIT analysis of sediments, extracts and standard mixtures. G-Cubed, 14 (12). doi: 10.1002/2013GC004904

Ussler, W., Preston, C., Tavormina, P., Pargett, D., Jensen, S., Roman, B., Marin, R., Shah, S.R., Girguis, P.R., Birch, J.M., Orphan, V., Scholin, C. (2013) Autonomous Application of Quantitative PCR in the Deep Sea: In Situ Surveys of Aerobic Methanotrophs Using the Deep-sea Environmental Processor. Environmental Science and Technology, 47 (16), 9339–9346. doi: 10.1021/es4023199

Shah, S.R., Griffith, D.R., McNichol, A.P., Galy V., Eglinton, T.I. (2013) Prominent bacterial heterotrophy and sources of 13C-depleted fatty acids to the interior Canada Basin. Biogeosciences, 10, 7065–7080. doi: 10.5194/bg-10-7065-2013.

Close, H.G., Shah, S.R., Ingalls, A.E., Diefendorf, A.F., Brodie, E.L., Hansman, R.L., Freeman, K.H., Aluwihare, L.I., Pearson, A. (2013) Export of submicron particulate organic matter to mesopelagic depth in an oligotrophic gyre. Proceedings of the National Academy of Sciences, 110 (31), 12565-12570. doi: 10.1073/pnas.1217514110.

Shah, S.R., Joye, S.B., Brandes, J.A., McNichol, A.P. (2013) Carbon isotopic evidence for microbial control of carbon supply to Orca Basin, Gulf of Mexico at the seawater-brine interface. Biogeosciences, 10, 3175-3183. doi: 10.5194/bg-10-3175-2013.

Wankel, S.D., Joye, S.B., Samarkin, V.A., Shah, S.R., Friederich, G., Melas-Kyriazi, J., Girguis, P.R. (2010) New constraints on diffusive methane fluxes and rates of anaerobic methane oxidation in a Gulf of Mexico brine pool via deep sea in situ mass spectrometry. Deep Sea Research I 57, 2022-2029. doi: 10.1016/j.dsr2.2010.05.009.

Liu, Z., Pagani, M., Zinniker, D., DeConto R., Huber, M., Brinkhuis H., Shah, S.R., Lecki R.M., Pearson, A. (2009) Global cooling during the Eocene-Oligocene Climate Transition. Science 323, 1187-1190. doi: 10.1126/science.1166368

Schouten, S., Hopmans, E.C., van der Meer, J., Mets, A., Bard, E., Bianchi, T.S., Diefendorf A., Escala M., Freeman, K.H., Furukawa, Y., Huguet C., Ingalls A., Menot-Combes G., Nederbragt, A.J., Oba, M., Pearson, A., Pearson, E.J., Rosell-Mele, A., Schaeffer, P., Shah, S.R., Shanahan, T.M., Smith, R.W., Smittenberg, R., Talbot, H.M., Uchida, M., Van Mooy, B.A.S., Yamamoto, M., Zhang Z.H. and Sinninghe Damsté, J.S. (2009) An interlaboratory study of TEX86 and BIT analysis using high-performance liquid chromatography–mass spectrometry, Geochemistry Geophysics Geosystems, 10, Q03012, doi:10.1029/2008GC002221.

Shah, S.R., Mollenhauer G., Ohkouchi N., Eglinton, T.I., Pearson, A. (2008) Origins of archaeal tetraether lipids in sediments: Insights from radiocarbon analysis. Geochimica et Cosmochimica Acta 72, 4577-4594. doi: 10.1016/j.gca.2008.06.021.

Shah, S.R. and A. Pearson. (2007) Ultra-microscale (5-25µg C) analysis of individual lipids by 14C AMS: Assessment and correction for sample processing blanks. Radiocarbon 49, 69-82.

Ingalls, A.E.*, Shah, S.R.*, Hansman, R.L., Aluwihare, L.I., Santos, G.M., Druffel, E.R.M. and A. Pearson. (2006) Quantifying archaeal community autotrophy in the mesopelagic ocean using natural radiocarbon. Proceedings of the National Academy of Sciences 103, 6442-6447. doi: 10.1073/pnas.0510157103. *co-first authors

Mecray, E.L., M.R. Buchholtz ten Brink, Shah, S. (2000) “Metals in the Surface Sediments of Long Island Sound.” Chapter 6 In: Geo-Referenced Sea-Floor Mapping and Bottom Photography in Long Island Sound. V.F. Paskevich and L.J. Poppe, Eds., USGS Open-File Report 00-304.

Author Identifiers

orcid logoORCID


Google Scholar