Professor Michael Ellwood
Areas of expertise
- Biological Oceanography 040501
- Chemical Oceanography 040502
- Analytical Chemistry 0301
- Oceanography 0405
Researcher's projects
1) Microscopic plankton form the base of the marine food-chain and account for more than half of global primary production, and hence moderates our climate through the ocean's ability to drawdown carbon dioxide. In this project, the sources and bio-availability of the key micro-nutrient, iron, and its influence on plankton productivity in the surface ocean will be investigated by making state-of-the-art iron isotope measurements on plankton and waters samples collected from the Tasman Sea region. The knowledge generated in this project will help elucidate future impacts and feedbacks desertification of continental Australian and ocean stratification have on the supply and cycling of iron in the marine realm.
2) This research will reconstruct the distribution of nutrients in the Southern Ocean using the isotope and trace element composition of fossil marine skeletons of siliceous and carbonate organisms. Understanding the distributions of key nutrients such as phosphate, nitrate and silicate in the surface and deep ocean is essential to understand the mechanisms by which marine algae influenced the drawdown of atmospheric carbon dioxide during the past. These links between nutrients, productivity and carbon dioxide are critical to understanding future climate change and its connection to increases in atmospheric carbon dioxide concentration associated with fossil fuel burning.
Available student projects
Project 1
The Southern Ocean is of global importance as it plays a key role in regulating atmospheric carbon dioxide (CO2). However, phytoplankton growth in Southern Ocean waters is sub-optimal as a result of chronic iron limitation, thus their ability to draw down CO2 during photosynthesis is limited. As iron availability critically underpins the structure, functioning and productivity of marine ecosystems a pressing challenge is to quantify the complex interplay between physical iron supply, its chemical and photochemical transformations, and the biological uptake and recycling of iron in the ocean. In this project, the sources and bio-availability of iron and its influence on plankton productivity in Southern Ocean waters will be investogated. To trace these changes iron isotope ratios as a diagnostic tool to fingerprint the biogeochemical cycle of iron in Southern Ocean waters.
The aims of this project are to develop a mechanistic understanding of:
- the cycling of iron in Southern Ocean surface waters and the modes by which iron is recycled between phytoplankton and bacteria
- how phytoplankton, zooplankton and bacteria acquire iron via reductive processes
- how iron bioavailability manifests through to the cellular uptake of other biologically important elements (e.g. zinc and silicon) by phytoplankton
- how a changing Southern Ocean will influence iron demand and assimilation by phytoplankton and what will be the consequent effects on iron biogeochemistry.
To do this will involve:
- culturing Southern Ocean phytoplankton under a matrix of iron and environmental conditions to determine nutrient and trace metal uptake kinetics and cellular content;
- undertaking ship-board manipulation experiments involving the resident Southern Ocean
Project 2
Clean hydrogen production offers Australia an opportunity to transition from a carbon-intensive economy to low carbon economy. The electrolysis of water to generate hydrogen is also an attractive storage technology, especially for renewable energy. Currently, about 50% of the world’s hydrogen is produced by the steam methane reforming (SMR) process where natural gas is reacted with steam to form carbon monoxide and hydrogen. In contrast, electrolysis uses electricity to split water using the following reaction:
2H2O →O2+2H2
One key issue with the production of hydrogen, using both the steam methane reforming process and freshwater electrolysis, is the amount of water that needs to be consumed. Both SMR and electrolysis are water-intensive processes.
For Australia, seawater is an abundant feedstock for the electrolytic water-splitting process; however, there are challenges associated with the seawater electrolysis, especially the production of chlorine gas. Recent advances in electrocatalyst development involving multilayer nickel-sulphide-iron anodic electrodes have overcome these limitations, thus affording sustainable hydrogen production in laboratory-scale systems.
One of the exciting developments associated with electrolytic hydrogen from seawater is the coupling of it with carbon dioxide removal (CDR) technologies. During the production of hydrogen from seawater proton and hydroxyl ions are produced. These ions can be used to capture carbon dioxide when powdered silicate and carbonate minerals are added to the electrolysis cell.
This project will explore electrolytic hydrogen production from seawater coupled with the enhanced weathering of silicate and carbonate minerals for carbon dioxide capture.
Publications
- Sieber, M, Conway, T, de Souza, G et al. 2021, 'Isotopic fingerprinting of biogeochemical processes and iron sources in the iron-limited surface Southern Ocean', Earth and Planetary Science Letters, vol. 567.
- O'Neill, C, Hogg, A, Ellwood, M et al. 2021, 'Sequential changes in ocean circulation and biological export productivity during the last glacial-interglacial cycle: a model-data study', Climate of the Past, vol. 17, no. 1, pp. 171-201.
- Koenig, D, Conway, T, Ellwood, M et al. 2021, 'Constraints on the Cycling of Iron Isotopes From a Global Ocean Model', Global Biogeochemical Cycles, vol. 35, no. 9, pp. 1-23.
- Maher, W, Krikowa, F & Ellwood, M 2020, 'Mercury cycling in Australian estuaries and near shore coastal ecosystems: Triggers for management', Elementa: science of the anthropocene, vol. 8, no. 29.
- Whitby, H, Bressac , M, Sarthou, G et al. 2020, 'Contribution of Electroactive Humic Substances to the Iron-Binding Ligands Released During Microbial Remineralization of Sinking Particles', Geophysical Research Letters, vol. 47, no. 7, pp. -.
- Ellwood, M, Strzepek, R, Strutton, P et al. 2020, 'Distinct iron cycling in a Southern Ocean eddy', Nature Communications, vol. 11.
- Fourquez, M, Bressac , M, Deppeler, S et al. 2020, 'Microbial Competition in the Subpolar Southern Ocean: An Fe�C Co-limitation Experiment', Frontiers in Marine Science, vol. 6.
- Ellwood, M, Strzepek, R, Chen, X et al. 2020, 'Some observations on the biogeochemical cycling of zinc in the Australian sector of the Southern Ocean: a dedication to Keith Hunter', Marine and Freshwater Research, vol. 71, no. 3, pp. 355-373.
- Sieber, M, Conway, T, de Souza, G et al. 2020, 'Cycling of zinc and its isotopes across multiple zones of the Southern Ocean: Insights from the Antarctic Circumnavigation Expedition', Geochimica et Cosmochimica Acta, vol. 268, no. 0, pp. 310-324.
- Janssen, D, Sieber, M, Ellwood, M et al. 2020, 'Trace metal and nutrient dynamics across broad biogeochemical gradients in the Indian and Pacific sectors of the Southern Ocean', Marine Chemistry, vol. 221.
- Andrew, S, Morell, H, Strzepek, R et al. 2019, 'Iron Availability Influences the Tolerance of Southern Ocean Phytoplankton to Warming and Elevated Irradiance', Frontiers in Marine Science, vol. 6, pp. -.
- O'Neill, C, Hogg, A, Ellwood, M et al. 2019, 'The [simple carbon project] model v1.0', Geoscientific Model Development, vol. 12, no. 4, pp. 1541-1572.
- Martiny, A, Lomas, M, Fu, W et al 2019, 'Biogeochemical controls of surface ocean phosphate', Science Advances, vol. 5, no. 8, pp. 1-9.
- Rickli, J, Janssen, D, Hassler, C et al 2019, 'Chromium biogeochemistry and stable isotope distribution in the Southern Ocean', Geochimica et Cosmochimica Acta, vol. 262, pp. 188-206.
- Chiswell, S, Safi, K, Sander, S et al 2019, 'Exploring mechanisms for spring bloom evolution: contrasting 2008 and 2012 blooms in the southwest Pacific Ocean', Journal of Plankton Research, vol. 41, no. 3, pp. 329-348.
- Sieber, M, Conway, T, de Souza, G et al. 2019, 'High-resolution Cd isotope systematics in multiple zones of the Southern Ocean from the Antarctic Circumnavigation Expedition', Earth and Planetary Science Letters, vol. 527, no. 0.
- Bressac , M, Guieu , C, Ellwood, M et al. 2019, 'Resupply of mesopelagic dissolved iron controlled by particulate iron composition', Nature Geoscience, vol. 12, no. 12, pp. 995-1000.
- Tagliabue, A, Bowie, A, DeVries, T et al. 2019, 'The interplay between regeneration and scavenging fluxes drives ocean iron cycling', Nature Communications, vol. 10, no. 0.
- George, E, Stirling, C, Gault-Ringold, M et al 2019, 'Marine biogeochemical cycling of cadmium and cadmium isotopes in the extreme nutrient-depleted subtropical gyre of the South West Pacific Ocean', Earth and Planetary Science Letters, vol. 514, pp. 84-95.
- Ellwood, M, Hassler, C, Moisset, S et al 2019, 'Iron isotope transformations in the meromictic Lake Cadagno', Geochimica et Cosmochimica Acta, vol. 255, pp. 205-221.
- Meyerink, S, Boyd, P, Maher, W et al 2019, 'Putting the silicon cycle in a bag: Field and mesocosm observations of silicon isotope fractionation in subtropical waters east of New Zealand', Marine Chemistry, vol. 213, pp. 1-12.
- Maher, W, Duncan, E, Martin, H et al 2018, 'Arsenic concentrations and speciation in Australian and imported rice and commercial rice products', Environmental Chemistry, vol. 15, no. 7, pp. 387-402.
- Chase, Z, Ellwood, M & van de Flierdt, T 2018, 'Discovering the Ocean's Past through Geochemistry', Elements, vol. 14, no. 6, pp. 397-402.
- Chutcharavan, P, Dutton, A & Ellwood, M 2018, 'Seawater 234U/238U recorded by modern and fossil corals', Geochimica et Cosmochimica Acta, vol. 224, pp. 1-17pp.
- Ellwood, M, Bowie, A, Baker, A et al 2018, 'Insights Into the Biogeochemical Cycling of Iron, Nitrate, and Phosphate Across a 5,300 km South Pacific Zonal Section (153°E-150°W)', Global Biogeochemical Cycles, vol. 32, no. 2, pp. 187-207pp.
- Samanta, M, Ellwood, M & Strzepek, R 2018, 'Zinc isotope fractionation by Emiliania huxleyi cultured across a range of free zinc ion concentrations', Journal of Limnology and Oceanography, vol. 63, no. 2, pp. 660-671.
- Sutton, J, Andre, L, Cardinal, D et al 2018, 'A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements', Frontiers in Earth Science, vol. 5, pp. 1-24.
- Maher, W, Krikowa, F, Foster, S et al 2018, 'Antimony measurements in environmental matrices: Seven considerations', Journal of Analytical Atomic Spectrometry, vol. 33, no. 5, pp. 706-712.
- Schlitzer, R, Anderson, R, Dodas, E et al 2018, 'The GEOTRACES Intermediate Data Product 2017', Chemical Geology, vol. 493, pp. 210-223.
- Yang, L, Nadeau, K, Meija, J et al 2018, 'Inter-laboratory study for the certification of trace elements in seawater certified reference materials NASS-7 and CASS-6', Analytical and Bioanalytical Chemistry, vol. 410, no. 18, pp. 4469-4479pp.
- Luxem, K, Ellwood, M & Strzepek, R 2017, 'Intraspecific variability in Phaeocystis antarctica?s response to iron and light stress', PLOS ONE (Public Library of Science), vol. 12, no. 7, pp. e0179751-e0179751.
- Meyerink, S, Ellwood, M, Maher, W et al. 2017, 'Effects of iron limitation on silicon uptake kinetics and elementalstoichiometry in two Southern Ocean diatoms, Eucampia antarcticaand Proboscia inermis, and the temperate diatom Thalassiosira pseudonana', Limnology and Oceanography, vol. 62, no. 6, pp. 2445-2462.
- Meyerink, S, Ellwood, M, Maher, W et al 2017, 'Iron Availability Influences Silicon Isotope Fractionation in Two Southern Ocean Diatoms (Proboscia Inermis and Eucampia Antarctica) and a Coastal Diatom (Thalassiosira Pseudonana)', Frontiers in Marine Science, vol. 4, no. July, pp. 1-10pp.
- Archer, C., Andersen, M.B., Cloquet, C., Conway, T.M., Dong, S., Ellwood, M., Moore, R., Nelson, J., Rehkamper, M., Rouxel, O., Samanta, M., Shin, K.-C., Sohrin, Y., Takano, S., Wasylenki, L., 2017, 'Inter-calibration of a proposed new primary reference standard AA-ETH Zn for zinc isotopic analysis', Journal of Analytical Atomic Spectrometry, vol. 32, no. 2, pp. 415-419.
- 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, vol. 10, no. 3, pp. 167-173pp.
- Ellwood, M.J., Sinoir, M., Hassler, C.S., 2017, 'Dissolved zinc isotope cycling in the Tasman Sea, SW Pacific Ocean', Marine Chemistry, vol. 192, pp. 1-12pp.
- Ellwood, M. J., L. Schneider, J. Potts, G. E. Batley, J. Floyd, and W. A. Maher. 2016, 'Volatile selenium fluxes from selenium-contaminated sediments in an Australian coastal lake', Environmental Chemistry, vol. 13, no. 1, pp. 68-75.
- Jagtap, R., W. Maher, F. Krikowa, M. J. Ellwood, and S. Foster. 2016, 'Measurement of selenomethionine and selenocysteine in fish tissues using HPLC-ICP-MS', Microchemical Journal, vol. 128, pp. 248-257.
- Rousseau, J., Ellwood, M.J., Bostock, H., Neil, H., 2016, 'Estimates of late Quaternary mode and intermediate water silicic acid concentration in the Pacific Southern Ocean', Earth and Planetary Science Letters, vol. 439, pp. 101-108.
- Samanta, M., Ellwood, M.J., Mortimer, G.E. 2016, 'A method for determining the isotopic composition of dissolved zinc in seawater by MC-ICP-MS with a 67Zn-68Zn double spike', Microchemical Journal, vol. 126, pp. 530-537.
- Sinoir, M., Ellwood, M.J., Butler, E.C.V., Bowie, A.R., Mongin, M., Hassler, C.S. 2016, 'Zinc cycling in the Tasman Sea: Distribution, speciation and relation to phytoplankton community', Marine Chemistry, vol. 182, pp. 25-37.
- Armand, L, Coleman, R, Coffin, M et al. 2015, Strategic Marine Alliance Research, Teaching and Training (SMART2): A national Master-level at sea training initiative.
- Boyd, P.W., Strzepek, R.F., Ellwood, M.J., Hutchins, D.A., Nodder, S.D., Twining, B.S., Wilhelm, S.W. 2015, 'Why are biotic iron pools uniform across high- and low-iron pelagic ecosystems?', Global Biogeochemical Cycles, vol. Published online 24 JUL 2015.
- Ellwood, M.J., Hutchins, D.A., Lohan, M.C., Milne, A., Nasemann, P., Nodder, S.D., Sander, S.G., Strzepek, R., Wilhelm, S.W., Boyd, P.W., 2015, 'Iron stable isotopes track pelagic iron cycling during a subtropical phytoplankton bloom', PNAS - Proceedings of the National Academy of Sciences of the United States of America, vol. 112, no. 1, pp. E15-E20.
- Maher, W.A., Ellwood, M.J., Krikowa, F., Raber, G., Foster, S. 2015, 'Measurement of arsenic species in environmental, biological fluids and food samples by HPLC-ICPMS and HPLC-HG-AFS', Journal of Analytical Atomic Spectrometry, vol. 30, no. 10, pp. 2129-2183.
- Meissner, K., Abram, N., Armand, L., Chase, Z., De Deckker, P., Ellwood, M., Exon, N., Gagan, M., Goodwin, I., Howard, W., Lough, J., McCulloch, M., McGregor, H., Moy, A., O’Leary, M., Phipps, S., Skilbeck, G., Webster, J., Welsh, K., Zinke, J. 2015, 'Dealing with Climate Change: Palaeoclimate Research in Australia', Quaternary Australasia, vol. 32, no. 1, pp. 19-24.
- Thompson, C, Ellwood, M & Sander, S 2014, 'Dissolved copper speciation in the Tasman Sea, SW Pacific Ocean', Marine Chemistry, vol. 164, pp. 84-94.
- Thompson, C & Ellwood, M 2014, 'Dissolved copper isotope biogeochemistry in the Tasman Sea, SW Pacific Ocean', Marine Chemistry, vol. 165, pp. 1-9.
- Ellwood, M.J., Nodder, S.D., King, A., Hutchins, D.A., Wilhelm, S.W., Boyd, P.W. 2014, 'Pelagic iron cycling during the subtropical spring bloom, east of New Zealand', Marine Chemistry, vol. 160, pp. 18-33.
- Hassler, C.S., Ridgway, K.R., Bowie, A.R., Butler, E.C.V., Clementson, L.A., Doblin, M.A., Davies, D.M., Law, C., Ralph, P.J., van der Merwe, P., Watson, R., Ellwood, M.J. 2014, 'Primary productivity induced by iron and nitrogen in the Tasman Sea: An overview of the PINTS expedition', Marine and Freshwater Research, vol. 65, no. 6, pp. 517-537.
- Thompson, C, Ellwood, M & Wille, M 2013, 'A solvent extraction technique for the isotopic measurement of dissolved copper in seawater', Analytica chimica acta, vol. 775, pp. 106-113.
- Bostock, H.C., Barrows, T.T., Carter, L., Chase, Z., Cortese, G., Dunbar, G.B., Ellwood, M., Hayward, B., Howard, W., Neil, H.L., Noble, T.L., Mackintosh, A., Moss, P.T., Moy, A.D., White, D., Williams, M.J.M., Armand, L.K., 2013, 'A review of the Australian-New Zealand sector of the Southern Ocean over the last 30ka (Aus-INTIMATE project)', Quaternary Science Reviews, vol. 74, pp. 35-57.
- Ellwood, M.J., Law, C.S., Hall, J., Woodward, E.M.S., Strzepek, R., Kuparinen, J., Thompson, K., Pickmere, S., Sutton, P., Boyd, P.W. 2013, 'Relationships between nutrient stocks and inventories and phytoplankton physiological status along an oligotrophic meridional transect in the Tasman Sea', Deep-Sea Research Part 1. Oceanographic Research Papers, vol. 72, pp. 102-120.
- Wilhelm, S.W., King, A.L., Twining, B.S., LeCleir, G.R., DeBruyn, J.M., Strzepek, R.F., Breene, C.L., Pickmere, S., Ellwood, M.J., Boyd, P.W., Hutchins, D.A., 2013, 'Elemental quotas and physiology of a southwestern pacific ocean plankton community as a function of iron availability', Aquatic Microbial Ecology, vol. 68, no. 3, pp. 185-194.
- Wille, M., Nebel, O., Van Kranendonk, M.J., Schoenberg, R., Kleinhanns, I., Ellwood, M.J 2013, 'Mo-Cr isotope evidence for a reducing Archean atmosphere in 3.46-2.76Ga black shales from the Pilbara, Western Australia', Chemical Geology, vol. 340, pp. 68-76.
- Maher, W, Krikowa, F, Ellwood, M et al 2012, 'Overview of hyphenated techniques using an ICP-MS detector with an emphasis on extraction techniques for measurement of metalloids by HPLC-ICPMS', Microchemical Journal, vol. 105, pp. 15-31.
- Howard, W, Nash, M, Anthony, K et al. 2012, 2012 Marine Climate Change Report Card: Ocean Acidification.
- Boyd, P.W., Strzepek, R., Chiswell, S., Chang, H., DeBruyn, J.M., Ellwood, M., Keenan, S., King, A.L., Maas, E.W., Nodder, S., Sander, S.G., Sutton, P., Twining, B.S., Wilhelm, S.W., Hutchins, D.A. 2012, 'Microbial control of diatom bloom dynamics in the open ocean', Geophysical Research Letters, vol. 39, no. 17.
- Boyle, E.A., John, S., Abouchami, W., Adkins, J.F., Echegoyen-Sanz, Y., Ellwood, M., Flegal, A.R., Fornace, K., Gallon, C., Galer, S., Gault-Ringold, M., Lacan, F., Radic, A., Rehkamper, M., Rouxel, O., Sohrin, Y., Stirling, C., Thompson, C., Vance, D., Xue, Z., Zhao, Y., 2012, 'GEOTRACES IC1 (BATS) contamination-prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration', Limnology and Oceanography: Methods, vol. 10, pp. 653-665.
- King, A.L., Sañudo-Wilhelmy, S.A., Boyd, P.W., Twining, B.S., Wilhelm, S.W., Breene, C., Ellwood, M.J., Hutchins, D.A. 2012, 'A comparison of biogenic iron quotas during a diatom spring bloom using multiple approaches', Biogeosciences Discussions, vol. 9, pp. 667-687.
- Matteson, A.R., Loar, S.N., Pickmere, S., DeBruyn, J.M., Ellwood, M.J., Boyd, P.W., Hutchins, D.A., Wilhelm, S.W. 2012, 'Production of viruses during a spring phytoplankton bloom in the South Pacific Ocean near of New Zealand', FEMS Microbiology Ecology, vol. 79, no. 3, pp. 709-719.
- Kuparinen, J, Hall, J, Ellwood, M et al 2011, 'Bacterioplankton responses to iron enrichment during the SAGE experiment', Deep-Sea Research Part II: Tropical studies in oceanography, vol. 58, no. 6, pp. 800-807.
- Harvey, M, Law, C, Smith, M et al 2011, 'The SOLAS air-sea gas exchange experiment (SAGE) 2004', Deep-Sea Research Part II: Tropical studies in oceanography, vol. 58, no. 6, pp. 753-763.
- Andersen, M.B., Vance, D., Archer, C., Anderson, R.F., Ellwood, M.J. and Allen, C.S., 2011, 'The Zn abundance and isotopic composition of diatom frustules, a proxy for Zn availability in ocean surface seawater', Earth and Planetary Science Letters, vol. 301, no. 1-2, pp. 137-145.
- Jagtap, R., Krikowa, F., Maher, W., Foster, S. and Ellwood, M., 'Measurement of methyl mercury (I) and mercury (II) in fish tissues and sediments by HPLC-ICPMS and HPLC-HGAAS', Talanta, vol. 85, no. 1, pp. 49-55.
- Law, C, Woodward, E, Ellwood, M, Marriner, A, Bury, S, and Safi K., 2011, 'Response of surface nutrient inventories and nitrogen fixation to a tropical cyclone in the southwest pacific', Limnology and Oceanography, vol. 56, no. 4, pp. 1372-1385.
- Law, C.S., Smith, M.J., Stevens, C., Abraham, E.R., Ellwood, M.J., Hill, P., Nodder, S., Peloquin, J., Pickmere, S., Safi, K. and Walkington, C.M., 2011, 'Did dilution limit the phytoplankton response to iron addition in HNLCLSi sub-Antarctic waters during the SAGE experiment?', Deep-Sea Research Part II: Tropical studies in oceanography, vol. 58, no. 6, pp. 786-799.
- Peloquin, J., Hall, J., Safi, K., Ellwood, M., Law, C., Thompson, K., Kuparinen, J., Harvey, M. and Pickmere, S., 2011, 'Control of the phytoplankton response during the SAGE experiment: A synthesis', Deep-Sea Research Part II: Tropical studies in oceanography, vol. 58, no. 6, pp. 824-838.
- Boyd, P & Ellwood, M 2010, 'The biogeochemical cycle of iron in the ocean', Nature Geoscience, vol. 3, no. 10, pp. 675-682.
- Sutton, J, Ellwood, M, Maher, W et al 2010, 'Oceanic distribution of inorganic germanium relative to silicon: Germanium discrimination by diatoms', Global Biogeochemical Cycles, vol. 24, no. 2, pp. 1-13.
- Ellwood, M, Wille, M & Maher, W 2010, 'Glacial Silicic Acid Concentrations in the Southern Ocean', Science, vol. 330, no. 6007, pp. 1088-1091.
- Wille, M, Sutton, J, Ellwood, M et al 2010, 'Silicon isotopic fractionation in marine sponges: A new model for understanding silicon isotopic variations in sponges', Earth and Planetary Science Letters, vol. 292, no. 3-4, pp. 281-289.
- Telford, K, Maher, W, Krikowa, F et al 2009, 'Bioaccumulation of antimony and arsenic in a highly contaminated stream adjacent to the Hillgrove Mine, NSW, Australia', Environmental Chemistry, vol. 6, no. 2, pp. 133-143.
- Fallon, S, Strzepek, K, Norman, R et al. 2009, 'A simple radiocarbon dating method for determining the age and growth rate of deep-sea sponges', Nuclear Instruments and Methods in Physics Research: Section B, vol. 268, no. 8 Oct 2009, pp. 1241-1243.
- Vopel, K, Pilditch, C, Wilson, P et al 2009, 'Oxidation of surface sediment: effects of disturbance depth and seawater flow speed', Marine Ecology Progress Series, vol. 392, pp. 43-55.
- Vance, D, Archer, C, Bermin, J et al 2008, 'The copper isotope geochemistry of rivers and oceans', Earth and Planetary Science Letters, vol. 274, no. 1-2, pp. 204-213.
- Ellwood, M, Wilson, P, Vopel, K et al 2008, 'Trace metal cycling in the Whau Estuary, Auckland, New Zealand.', Environmental Chemistry, vol. 5, no. 4, pp. 289-298.
- Ellwood, A, Boyd, P & Sutton, P 2008, 'Winter-time dissolved iron and nutrient distribution in the Subantarctic Zone from 40-52S; 155-160E', Geophysical Research Letters, vol. 35, no. 11, p. 6.
- Ellwood, M 2008, 'Wintertime trace metal (Zn, Cu, Ni, Cd, Pb and Co) and nutrient distributions in the Subantarctic Zone between 40-52°S; 155-160°E', Marine Chemistry, vol. 112, no. 1-2, pp. 107-117.
- Croot, P, Frew, R, Sander, S et al 2007, 'Physical mixing effects on iron biogeochemical cycling: FeCycle experiment', Journal of Geophysical Research, vol. 112, no. C06015, p. 18.
- Ellwood, M, Kelly, M & Richer de Forges, B 2007, 'Silica banding in the deep-sea lithistid sponge Corallistes undulatus: Investigating the potential influence of diet and environment on growth', Limnology and Oceanography, vol. 52, no. 5, pp. 1865-1873.
- Kelly, M, Ellwood, M, Tubbs, L et al 2007, 'The lithistid Demospongiae in New Zealand waters: species composition and distribution', International Sponge Symposium 2007, ed. Marcio Reis Custodio, Gisele Lobo-Hajdu, Guiljerme Muricy, IMOS Grafica e Editora, Brazil, pp. 393-404.
- Tian, F, Frew, R, Sander, S et al 2006, 'Orgainic iron (III) speciation in surface transects across a frontal zone: the Chatham Rise, New Zealand', Marine and Freshwater Research, vol. 57, pp. 533-544.
- Ellwood, M, Kelly, M, Maher, W et al 2006, 'Germanium incorporation into sponge spicules: Development of a proxy for reconstructing inorganic germanium and silicon concentrations in seawater', Earth and Planetary Science Letters, vol. 243, pp. 749-759.
- Foster, S, Maher, W, Krikowa, F et al 2005, 'Observations on the measurement of total antimony and antimony species in algae, plant and animal tissues', International Workshop on Antimony in the Environment 2005, Royal Society of Chemistry, United Kingdom, pp. 1214-1219.
- LeBlanc, K, Hare, C, Boyd, P et al 2005, 'Fe and Zn effects on the Si Cycle and diatom community structure in two contrasting high and low-silicate HNLC areas', Deep-Sea Research Part 1. Oceanographic Research Papers, vol. 52, pp. 1842-1864.
- Mioni, C, Handy, S, Ellwood, A et al 2005, 'Tracking changes in bioavailable Fe within high-nitrate low-chlorophyll oceanic waters: A first estimate using a heterotrophic bacterial bioreporter', Global Biogeochemical Cycles, vol. 19, no. GB4S25, p. 10.
- Ellwood, M, van den Berg, C, Boye, M et al 2005, 'Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean', Marine and Freshwater Research, vol. 56, no. 8, pp. 1069-1075.
- Boyd, P, Law, C, Hutchins, D et al 2005, 'FeCycle: Attempting an iron biogeochemcial budget from a mesoscale SF6 tracer experiment in unpertutbed low iron waters', Global Biogeochemical Cycles, vol. 19, no. GB4S20, p. 13.
- Ellwood, M, Kelly, M, Neil, H et al 2005, 'Reconstruction of paleo-particulate organic carbon fluxes for the Campbell Plateau region of southern New Zealand using the zinc content of sponge spicules', Paleoceanography, vol. 20, no. 3, pp. 1-15.
- Kirby, J, Maher, W, Ellwood, M et al 2004, 'Arsenic Species Determination in Biological Tissues by HPLC-ICP-MS and HPLC-HG-ICP-MS', Australian Journal of Chemistry, vol. 57, pp. 957-966.
- Ellwood, M 2004, 'Zinc and cadmium speciation in subantarctic waters east of New Zealand', Marine Chemistry, vol. 87, no. 1-2, pp. 37-58.
- Boyd, P, McTainsh, G, Sherlock, V et al 2004, 'Episodic enhancement of phytoplankton stocks in New Zealand subantarctic waters: Contribution of atmospheric and ocieanic iron supply', Global Biogeochemical Cycles, vol. 18, pp. GB1029 1 of 23.
- Ellwood, M, Kelly, M, Nodder, S et al 2004, 'Zinc/silicon ratios of sponges: A proxy for carbon export to the seafloor', Geophysical Research Letters, vol. 31, pp. L12308 1 of 4.
- Ellwood, M & Maher, W 2003, 'Measurement of arsenic species in marine sediments by high-performance liquid chromatography-inductively coupled plasma mass spectrometry', Analytica chimica acta, vol. 477, no. 2, pp. 279-291.
- Ellwood, M & Maher, W 2003, 'Germanium cycling in the waters across a frontal zone: the Chatham Rise, New Zealand', Marine Chemistry, vol. 80, no. 2-3, pp. 145-159.
- Ellwood, M, Hunter, K & Cunninghame, R 2003, 'Elimination of equivalence point errors in the potentiometric titration of chloride, bromide and iodide mixtures with silver nitrate', Microchemical Journal, vol. 74, no. 2, pp. 187-192.
- Ellwood, M & Maher, W 2002, 'An automated hydride generation-cryogenic trapping ICP-MS system for measuring inorganic and methylated Ge, Sb and As species in marine and fresh waters', Journal of Analytical Atomic Spectrometry, vol. 17, no. 3, pp. 197-203.
- Ellwood, M & Maher, W 2002, 'Arsenic and antimony species in surface transects and depth profiles across a frontal zone: The chatham Rise, New Zealand', Deep-Sea Research Part 1. Oceanographic Research Papers, vol. 49, pp. 1971-1981.
- Tukai, R, Maher, W, McNaught, I et al 2002, 'Measurement of arsenic species in marine macroalgae by microwave-assisted extraction and high performance liquid chromatography-inductively coupled plasma mass spectrometry', Analytical Chemistry, vol. 457, pp. 173-185.
- Tukai, R, Maher, W, McNaught, I et al 2002, 'Occurrence and chemical form of arsenic in marine macroalgae from the east coast of Australia', Marine and Freshwater Research, vol. 53, pp. 971-980.
- Ellwood, M & Hunter, K 2000, 'The incorporation of Zinc and iron into the frustule of the marine diatom Thalassiorira pseudonana', Limnology and Oceanography, vol. 45, no. 7, pp. 1517-1524.
- Ellwood, M & van den Berg, C 2000, 'Zinc speciation in the Northeastern Atlantic Ocean', Marine Chemistry, vol. 68, no. 4, pp. 295-306.
- Ellwood, M & Hunter, K 2000, 'Determination of the Zn/Si ratio in diatom opal: method for the separation, cleaning and dissolution of diatoms', Marine Chemistry, vol. 66, pp. 149-160.
- Ellwood, M & Hunter, K 2000, 'Variations in the Zn/Si record over the last interglacial glacial transition', Paleoceanography, vol. 15, no. 5, pp. 506-514.
Projects and Grants
Grants information is drawn from ARIES. To add or update Projects or Grants information please contact your College Research Office.
- Survey of NETs and their relevance to climate change mitigation policies in Australia (Secondary Investigator)
- Holding coral reefs together with soluble cement (Secondary Investigator)
- Spinning the ferrous wheel: how is iron cycled in Southern Ocean waters? (Primary Investigator)
- Tracing the iron cycle in Southern Ocean waters (Primary Investigator)
- Probing the response of Southern Ocean phytoplankton to changes in iron biogeochemistry, light and pH associated with climate change (Primary Investigator)
- Southern ocean nutrients and their links to climate change: insights from the metal and silicon isotpoe signature of diatoms (Primary Investigator)
- Novel Dating Methods for Marine Sediments of Relevance to Determining Past Climate Changes (Secondary Investigator)
- Iron sources and cycling in the Tasman Sea (Primary Investigator)
- Southern Ocean nutrients and their links to climate change (Primary Investigator)
- A high performance stable-isotope microanalytical facility for environmental Earth science and climate change research (Secondary Investigator)
- Instrumentation for Innovative Marine Biogeochemistry (Secondary Investigator)
- The Southern Ocean's role in determining atmospheric CO2 levels: new insights from novel biogenic silica records of seawater pH (Secondary Investigator)
