Dr. Jeffrey Krause

Dr. Jeffrey Krause

Associate Professor
Marine Sciences


  • Associate Professor, University of South Alabama
  • Senior Marine Scientist II, Dauphin Island Sea Lab
  • Ph.D. 2008, College of Oceanic & Atmospheric Sciences, Oregon State University

Emphasis: Phytoplankton ecology, physiology and marine biogeochemistry

Research Interests

While phytoplankton may not sound important, nothing could be further from the truth.  Phytoplankton give us the three “F”s:

  1. "Fumes” to breathe, specifically oxygen.  In fact, phytoplankton provide the oxygen in 1 of every 2 breaths we take, the rest comes from land plants.

  2. "Food” to eat.  Like plants on land, phytoplankton are the base of the oceanic food web, meaning nearly all animal life in the ocean ultimately depends on phytoplankton producing food through process of photosynthesis.

  3. "Fuel” to our way of life.  Many people joke that crude oil comes from dinosaurs, but crude oil is actually the ancient remains of phytoplankton which have been compressed and modified by the environment over millions of years. 

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Current Funded Research Projects

  • “COLLABORATIVE RESEARCH: Understanding substrate limitation and Lithium and Silicon isotope fractionation during secondary clay formation in marine systems.”  National Science Foundation: Chemical Oceanography and Marine Geology/Geophysics.  PI: Krause, J.W., Wang, X.  Part of Collaborative Research Project, led by Krause, with Y. Tang (Georgia Institute of Technology).

  • “Ridges – Safe havens for ice-associated flora and fauna in a seasonally ice-covered Arctic Ocean” (HAVOC).  Research Council of Norway.  Subaward Lead: Krause, J.W.

  • “Peering into nature’s glass boxes - using nano-Raman spectroscopy to answer novel questions in diatom-focused environmental research.”  National Science Foundation: EPSCoR Research Infrastructure Improvement.  PI:  Krause, J.W.


  • Pickering, R.A., L. Cassarino, K.R. Hendry, X.L. Wang, K. Maiti, J.W. Krause. Using Stable Isotopes to Disentangle Marine Sedimentary Signals in Reactive Silicon Pools. Geophysical Research Letters. 47, e2020GL087877. doi: 10.1029/2020GL087877.

  • Cox, T.E., Cebrian, J., Tabor, M., West, L., Krause, J.W.. Do diatoms dominate benthic production in shallow systems? A case study from a mixed seagrass bed. Limnology and Oceanography: Letters doi: 10.1002/lol2.10167

  • Saad, E.M., R. A. Pickering, K. Shoji, M.I. Hossain, T. G. Glover, J.W. Krause*, and Y. Tang (*Corresponding author). Effect of Cleaning Methods on the Reactivity of Diatom Frustules. Marine Chemistry. 224, 103286. doi: 10.1016/j.marchem.2020.103826.

  • Marquez, I.A., Abraham, A., Krause, J.W.. Organic polymer consumption facilitates domoic acid entry into the marine food web without direct ingestion of Pseudo-nitzschia. Harmful Algae. 98, 101891. doi: 10.1016/j.hal.2020.101891.

  • Krause, J.W., M. A. Brzezinski, J.L. Largier, H.M. McNair, M. Maniscalco, K.D. Bidle, A.E. Allen, and K. Thamatrakoln. The interaction of physical and biological factors as drivers of phytoplankton spatial distribution in the northern California Current. Limnology and Oceanography. doi:10.1002/lno.11431.

  • Krause, J.W. and M.W. Lomas. Understanding diatoms' past and future biogeochemical role in high‐latitude seas. Geophysical Research Letters. 47, e2019GL085602. doi: 10.1029/2019GL085602.

  • Agustí, S., J.W. Krause, I.A. Marquez, P. Wassmann, S. Kristiansen, and C.M. Duarte . Arctic (Svalbard Islands) Active and Exported Diatom Stocks and Cell Health Status. Biogeosciences. 17:35–45. doi.org/10.5194/bg-17-35-2020.

  • Chaplin, C.C., M. Tabor, I.A. Marquez, K. Maiti, and J.W. Krause . Resuscitation of Microalgae from Mississippi River Plume Sediments. Gulf and Caribbean Research. 30, SC28-SC41. doi: 10.18785/gcr.3001.15.

  • Krause, J.W., I.K. Schulz, K. A. Rowe, W. Dobbins, M. Winding, M. Sejr, C.M. Duarte, and S. Agustí . Silicic acid limitation drives bloom termination and potential carbon sequestration in an Arctic bloom. Scientific Reports. 9. doi: 10.1038/s41598-019-44587-4.

  • Deleon, S.N., J.W. Krause, and R. Baker. Variability in microphytobenthos biomass and carbon isotopic values in shallow coastal waters of the northern Gulf of Mexico. Gulf and Caribbean Research. 30, SC22-SC27. doi: 10.18785/gcr.3001.11.

  • Stukel, M.R., T.B. Kelly, L.I. Aluwihare, K.A. Barbeau, R. Goericke, J.W. Krause, M.R. Landry, and M.D. Ohman. The Carbon: 234Thorium ratios of sinking particles in the California Current Ecosystem 1: Relationships with plankton ecosystem dynamics. Marine Chemistry. doi: 10.1016/j.marchem.2019.01.003.

  • Redalje, D., J. Ammerman, J. Cable, J. Herrera, A. Knapp, J.W. Krause, D. Valdes, and A. Hayward. Nutrients in the Gulf of Mexico: Distributions, Cycles, Sources, Sinks and Processes. In Gulf of Mexico Origin, Waters, and Biota. Volume 5, Chemical Oceanography. Ed: T. S. Bianchi. Texas A&M University Press, College Station. (ISBN-13: 978-1623497743).

  • Kranzler, C.F., J. W. Krause, M. A. Brzezinski, B. R. Edwards, W. P. Biggs, M. Maniscalco, J. P. McCrow, B. A. S. Van Mooy, K. D. Bidle, A. E. Allen, and K. Thamatrakoln . Silicon limitation facilitates virus infection and mortality of marine diatoms. Nature Microbiology. 4, 1790–1797. doi: 10.1038/s41564-019-0502-x.

  • Hendry, K. R., Huvenne, V. A. I., Robinson, L. F., Annett, A., Badger, M., Jacobel, A. W., Ng, H.C., Opher, J., Pickering, R. A., Taylor, M. L., Bates, S. L., Cooper, A., Cushman, G. G., Goodwin, C., Hoy, S., Rowland, G., Samperiz, A., Williams, J. A., Achterberg, E. P., Arrowsmith, C., Brearley, J. A., Henley, S. F., Krause, J.W., Leng, M. J., Li, T., McManus, J. F., Meredith, M. P., Perkins, R., Woodward, E. M.. Isotope Cycling in the Labrador Sea: Tracing the biogeochemical pathway of glacial meltwater from Southwest Greenland. Progress in Oceanography. 176, 102126. doi: 10.1016/j.pocean.2019.102126.

  • Lomas, M.W., S.E. Baer, S. Acton, and J.W. Krause. Pumped up by the Cold: Elemental Quotas and Stoichiometry of Polar Diatoms. Frontiers in Marine Science. doi: 10.3389/fmars.2019.00197

  • Gancel, H.N., R.H. Carmichael, K. Park, J.W. Krause, and S. Rikard. Field Mark-Recapture of Calcein-Stained Larval Oysters (Crassostrea virginica) in a Freshwater-Dominated Estuary. Estuaries and Coasts. doi.org/10.1007/s12237-019-00582-6.

  • Ohnemus, D.C., J.W. Krause, M.A. Brzezinski, J.L. Collier, S.B. Baines, and B.S. Twining. The chemical form of silicon in marine Synechococcus Marine Chemistry. doi: 10.1016/j.marchem.2018.08.004.

  • McNair, H.M., M.A. Brzezinski, and J.W. Krause . Diatom populations in an upwelling environment decrease silica content to avoid growth limitation Environmental Microbiology. doi: 10.1111/1462-2920.14431.

  • Krause, J.W., C.M. Duarte, I.A. Marquez, P. Assmy, M. Fernández-Méndez, I. Wiedmann, P. Wassmann, S. Kristiansen, and S. Agustí. Biogenic silica production and diatom dynamics in the Svalbard region during spring Biogeosciences 15, 6503-6517. doi: 10.5194/bg-15-6503-2018.

  • McNair, H.M., M.A. Brzezinski, C.P. Till, and J.W. Krause. Taxa-specific contributions to silica production in natural diatom assemblages Limnology and Oceanography 63(3), 1056-1075. doi: 10.1002/lno.10754.

  • Greer, A.T., A.M. Shiller, E.E. Hofmann, J.D. Wiggert, S.J. Warner, S.M. Parra, C. Pan, J.W. Book, D. Joung, S. Dykstra, J.W. Krause, B. Dzwonkowski, I.M. Soto, M.K. Cambazoglu, A.L. Deary, C. Briseño-Avena, A.D. Boyette, et al. . Functioning of coastal river-dominated ecosystems and implications for oil spill response: From observations to mechanisms and models Oceanography 31(3). doi.org/10.5670/oceanog.2018.302.

  • Biard, T., J.W. Krause, M.R. Stukel, and M.D. Ohman. The significance of giant phaeodarians (Rhizaria) to biogenic silica export in the California Current Ecosystem Global Biogeochemical Cycles 32(6), 987-1004. doi: 10.1029/2018GB005877.

  • Stukel, M.R., T. Biard, J.W. Krause, and M.D. Ohman. Large Phaeodaria in the Twilight Zone: Their Role in the Carbon Cycle Limnology and Oceanography 63(6), 2579-2594. doi: 10.1002/lno.10961.

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  • Biological Oceanography (Graduate, University of South Alabama)   
  • Physiology and Ecology of Marine Microalgae (Graduate, University of South Alabama)   
  • Introduction to Oceanography 

Current Lab Personnel:

  • Bates, Cassie (Lab Manager), Dauphin Island Sea Lab
    Aug. 2020- present, Supervisor

  • Cannon, Randi (Ph.D.), University of South Alabama
    Aug. 2019- present, Co-advisor

  • Cole, Liesl (M.S.), University of South Alabama
    July 2015- present, Co-advisor

  • Halstead, Kyle (M.S.), University of South Alabama
    Aug. 2017- present, Co-advisor

  • Marquez, Israel (Ph.D.), University of South Alabama
    July 2015- present, Advisor

  • Morrison, Blair (M.S.), University of South Alabama
    Jan. 2019- present, Co-advisor

  • Rellinger, Alison (Ph.D.), University of South Alabama
    Aug. 2010- present, Committee Chair

  • Smith, Alexandra (Ph.D.), University of South Alabama
    Aug. 2017- present, Co-advisor