Professor Michael Ellwood

  • Bachelor of Science (Hons), University of Otago, New Zealand, 1993. Dissertation: The determination of halides in a mixed halide solution.
  • Doctor of Philosophy, University of Otago, New Zealand, 1998. Thesis: The use of diatom opal as a recorder of surface seawater free zinc ion concentration.
  • Post-doctoral Fellow, University of Liverpool 1998-1998, United Kingdom. New Zealand Science and Technology Post-doctoral Fellow, National Institute of Water and Atmospheric Research Ltd (NIWA) 2001-2004, New Zealand.

Research interests

  • Trace elements in natural waters and their interactions with phytoplankton
  • Analytical techniques for measuring trace metals and isotopes
  • Trace element speciation in natural waters
  • Trace elements in marine organisms
  • The influence of ocean acidification marine organisms

Selected publications

  • Janssen, D.J., Gilliard, D., Rickli, J., Nasemann, P., Koschinsky, A., Hassler, C.S., Bowie, A.R., Ellwood, M.J., Kleint, C., Jaccard, S.L., 2023. Chromium stable isotope distributions in the southwest Pacific Ocean and constraints on hydrothermal input from the Kermadec Arc. Geochimica et Cosmochimica Acta 342, 31-44.
  • Gilbert, N.E., LeCleir, G.R., Pound, H.L., Strzepek, R.F., Ellwood, M.J., Twining, B.S., Roux, S., Boyd, P.W., Wilhelm, S.W., 2023. Giant Virus Infection Signatures Are Modulated by Euphotic Zone Depth Strata and Iron Regimes of the Subantarctic Southern Ocean. mSystems, e01260-01222.
  • Wang, H., Wang, W., Liu, M., Zhou, H., Ellwood, M.J., Butterfield, D.A., Buck, N.J., Resing, J.A., 2022. Iron ligands and isotopes in hydrothermal plumes over backarc volcanoes in the Northeast Lau Basin, Southwest Pacific Ocean. Geochimica et Cosmochimica Acta 336, 341-352.
  • Gilbert, N.E., LeCleir, G.R., Strzepek, R.F., Ellwood, M.J., Twining, B.S., Roux, S., Pennacchio, C., Boyd, P.W., Wilhelm, S.W., 2022. Bioavailable iron titrations reveal oceanic Synechococcus ecotypes optimized for different iron availabilities. ISME Communications 2, 54.
  • Andrew, S.M., Strzepek, R.F., M. Whitney, S., Chow, W.S., Ellwood, M.J., 2022. Divergent physiological and molecular responses of light- and iron-limited Southern Ocean phytoplankton. Limnology and Oceanography Letters 7, 150-158.
  • Kipp, M.A., Li, H., Ellwood, M.J., John, S.G., Middag, R., Adkins, J.F., Tissot, F.L.H., 2022. 238U, 235U and 234U in seawater and deep-sea corals: A high-precision reappraisal. Geochimica et Cosmochimica Acta 336, 231-248.
  • König, D., Conway, T.M., Ellwood, M.J., Homoky, W.B., Tagliabue, A., 2021. Constraints on the Cycling of Iron Isotopes From a Global Ocean Model. Global Biogeochem. Cycles 35, e2021GB006968.
  • Ellwood, M.J., Strzepek, R.F., Strutton, P.G., Trull, T.W., Fourquez, M., Boyd, P.W., 2020. Distinct iron cycling in a Southern Ocean eddy. Nature Communications. 11, 1-8.
  • Martiny, A.C., Lomas, M.W., Fu, W., Boyd, P.W., Chen, Y.-l.L., Cutter, G.A., Ellwood, M.J., Furuya, K., Hashihama, F., Kanda, J., Karl, D.M., Kodama, T., Li, Q.P., Ma, J., Moutin, T., Woodward, E.M.S., Moore, J.K., 2019. Biogeochemical controls of surface ocean phosphate. Science Advances 5, eaax0341.
  • Bressac, M., Guieu, C., Ellwood, M.J., Tagliabue, A., Wagener, T., Laurenceau-Cornec, E.C., Whitby, H., Sarthou, G., Boyd, P.W., 2019. Resupply of mesopelagic dissolved iron controlled by particulate iron composition. Nature Geoscience 12, 995–1000.
  • Tagliabue, A., Bowie, A.R., DeVries, T., Ellwood, M.J., Landing, W.M., Milne, A., Ohnemus, D.C., Twining, B.S., Boyd, P.W., 2019. The interplay between regeneration and scavenging fluxes drives ocean iron cycling. Nature Communications 10, 4960.
  • Boyd, P.W., Ellwood, M.J., Tagliabue, A., Twining, B.S., (2017). Biotic and abiotic retention, recycling and remineralization of metals in the ocean. Nature Geoscience, 10(3): 167-173.

EMSC1006 The Blue Planet

EMSC3023 Marine Biogeochemistry

EMSC3019 Coral Reef Field Studies: