PhD BSc(Hons) (Otago)Tel: 03 479 7913
Location: Science II 3n12
Email: rfrew@chemistry.otago.ac.nz
Main research interests
- Trace metals in natural waters
- Stable isotope geochemistry
- Paleo-chemistry
- Geochemical provenancing
Current research projects
Determining the geographical origin of food and other commodities of interest:
The geochemical composition of a natural product provides a inherent signature that can be related to its point of origin. We are currently working on developing robust tools encompassing analyses (light isotopes, trace metals and heavy isotopes), databasing and statistical interpretation. Projects on whole foods (e.g. honey, coffee, edible oils) are on-going and attention is now on deciphering the signal within complex mixtures.
Nitrogen in the oceans, fate and fluxes:
Nitrogen compounds i the ocean play an important role in sustaining primary productivity and some are implicated as potential climate modifiers. However the the controls of the rates and pathways of the cycling of nitrogen from the relatively inert N2(g) through the essential nutrients NO3 and NH4, amino acids and various gaseous oxides is not well understood. The potential of climate change underlines the importance of understanding the marine biogeochemistry of nitrogen. For example, the regions of nitrogen fixation will increase with global warming thereby enhancing the marine fixed nitrogen pool. On the other hand nitrous oxide is a significant greenhouse gas with a global warming potential 300 times that of CO2 on a molecular basis. This project applies isotopic tools to unravel the complexities of the marine nitrogen systematics.
Publications
Sim, J., McGoverin, C., Oey, I., Frew, R., & Kebede, B. (2024). Non-linear machine learning coupled near infrared spectroscopy enhanced model performance and insights for coffee origin traceability. Journal of Near Infrared Spectroscopy. Advance online publication. doi: 10.1177/09670335241269014 Journal - Research Article
Frew, R. (2024). Verification of origin to support the food sector [Plenary]. Proceedings of the New Zealand Institute of Food Science & Technology (NZIFST) Conference: Diversity in the Food Industry. (pp. 30-31). Retrieved from https://nzifst.org.nz Conference Contribution - Published proceedings: Abstract
Sim, J., McGoverin, C., Oey, I., Frew, R., & Kebede, B. (2024). Optimisation of vibrational spectroscopy instruments and pre-processing for classification problems across various decision parameters. Food Innovation & Advances, 3(1), 52-63. doi: 10.48130/fia-0024-0004 Journal - Research Article
Green, S., Fanning, E., Sim, J., Eyres, G. T., Frew, R., & Kebede, B. (2024). The potential of NIR spectroscopy and chemometrics to discriminate roast degrees and predict volatiles in coffee. Molecules, 29, 318. doi: 10.3390/molecules29020318 Journal - Research Article
Sim, J., Dixit, Y., McGoverin, C., Oey, I., Frew, R., Reis, M. M., & Kebede, B. (2024). Machine learning-driven hyperspectral imaging for non-destructive origin verification of green coffee beans across continents, countries, and regions. Food Control, 156, 110159. doi: 10.1016/j.foodcont.2023.110159 Journal - Research Article
2024
Journal - Research Article
Sim, J., McGoverin, C., Oey, I., Frew, R., & Kebede, B. (2024). Non-linear machine learning coupled near infrared spectroscopy enhanced model performance and insights for coffee origin traceability. Journal of Near Infrared Spectroscopy. Advance online publication. doi: 10.1177/09670335241269014
Sim, J., McGoverin, C., Oey, I., Frew, R., & Kebede, B. (2024). Optimisation of vibrational spectroscopy instruments and pre-processing for classification problems across various decision parameters. Food Innovation & Advances, 3(1), 52-63. doi: 10.48130/fia-0024-0004
Green, S., Fanning, E., Sim, J., Eyres, G. T., Frew, R., & Kebede, B. (2024). The potential of NIR spectroscopy and chemometrics to discriminate roast degrees and predict volatiles in coffee. Molecules, 29, 318. doi: 10.3390/molecules29020318
Sim, J., Dixit, Y., McGoverin, C., Oey, I., Frew, R., Reis, M. M., & Kebede, B. (2024). Machine learning-driven hyperspectral imaging for non-destructive origin verification of green coffee beans across continents, countries, and regions. Food Control, 156, 110159. doi: 10.1016/j.foodcont.2023.110159
Li, A., Abrahim, A., Islam, M., Mejías, E., Hafizati Abdul Halim, N., Frew, R., … Kelly, S. D. (2024). A new approach to detecting sugar syrup addition to honey: Stable isotope analysis of hexamethylenetetramine synthesised from honey monosaccharides (fructose and glucose). Food Chemistry, 434, 137451. doi: 10.1016/j.foodchem.2023.137451
Soni, K., Frew, R., & Kebede, B. (2024). A review of conventional and rapid analytical techniques coupled with multivariate analysis for origin traceability of soybean. Critical Reviews in Food Science & Nutrition, 64(19), 6616-6635. doi: 10.1080/10408398.2023.2171961
Conference Contribution - Published proceedings: Abstract
Frew, R. (2024). Verification of origin to support the food sector [Plenary]. Proceedings of the New Zealand Institute of Food Science & Technology (NZIFST) Conference: Diversity in the Food Industry. (pp. 30-31). Retrieved from https://nzifst.org.nz
2023
Journal - Research Article
Sim, J., Dixit, Y., McGoverin, C., Oey, I., Frew, R., Reis, M. M., & Kebede, B. (2023). Support vector regression for prediction of stable isotopes and trace elements using hyperspectral imaging on coffee for origin verification. Food Research International, 174, 113518. doi: 10.1016/j.foodres.2023.113518
Sim, J., McGoverin, C., Oey, I., Frew, R., & Kebede, B. (2023). Near-infrared reflectance spectroscopy accurately predicted isotope and elemental compositions for origin traceability of coffee. Food Chemistry, 427, 136695. doi: 10.1016/j.foodchem.2023.136695
Fanning, E., Eyres, G., Frew, R., & Kebede, B. (2023). Linking cocoa quality attributes to its origin using geographical indications. Food Control, 151, 109825. doi: 10.1016/j.foodcont.2023.109825
Sim, J., McGoverin, C., Oey, I., Frew, R., & Kebede, B. (2023). Stable isotope and trace element analyses with non-linear machine-learning data analysis improved coffee origin classification and marker selection. Journal of the Science of Food & Agriculture, 103, 4704-4718. doi: 10.1002/jsfa.12546
Conference Contribution - Published proceedings: Abstract
Soni, K., Kebede, B., & Frew, R. (2023). Employing stable isotopes and trace elements to trace soybean origin sourced from deforestation hot stops. Proceedings of the New Zealand Institute of Food Science & Technology (NZIFST) Conference: Food in a Changing World. S20. Retrieved from https://nzifst.org.nz
Fanning, E., Kebede, B., Eyres, G., & Frew, R. (2023). Can a rapid method predict the origin of NZ hops? Proceedings of the New Zealand Institute of Food Science & Technology (NZIFST) Conference: Food in a Changing World. S04. Retrieved from https://nzifst.org.nz
2022
Journal - Research Article
Anh, H. L., Nhan, D. D., Frew, R., & Quynh, T. M. (2022). Application of stable isotope technique to authenticate the geographical origin of imported apple products. Journal of Radioanalytical & Nuclear Chemistry, 331, 3613-3621. doi: 10.1007/s10967-022-08450-7
Schlieman, C. D., Wing, S. R., O'Connell-Milne, S. A., McMullin, R. M., Durante, L. M., Kolodzey, S., & Frew, R. D. (2022). Catchment modifications influence the composition of basal organic matter supporting suspension-feeding bivalves. Estuarine, Coastal & Shelf Science, 275, 107989. doi: 10.1016/j.ecss.2022.107989
Kalpage, M., Dissanayake, C., Diyabalanage, S., Chandrajith, R., Frew, R., & Fernando, R. (2022). Stable isotope and element profiling for determining the agroclimatic origin of cow milk within a tropical country. Foods, 11(3), 275. doi: 10.3390/foods11030275
Zhu, D., Hayman, A., Frew, R., Kebede, B., Chen, G., & Stewart, I. (2022). Milk powder extraction: Optimization of conditions for the water-soluble metabolites by proton nuclear magnetic resonance (1H-NMR). Analytical Letters, 55(1), 1-10. doi: 10.1080/00032719.2021.1907588
Journal - Research Other
Gregorčič, S. H., Ogrinc, N., Frew, R., Nečemer, M., Strojnik, L., & Zuliani, T. (2022). Reply to Horacek, M. The need to consider geochemistry when interpreting Sr-isotopes: Comment on "Gregorčič et al. The provenance of Slovenian milk using 87Sr/86Sr isotope ratios. Foods 2021, 10, 1729”. Foods, 11, 581. doi: 10.3390/foods11040581
2021
Journal - Research Article
Gregorčič, S. H., Ogrinc, N., Frew, R., Nečemer, M., Strojnik, L., & Zuliani, T. (2021). The provenance of Slovenian milk using 87Sr/86Sr isotope ratios. Foods, 10(8), 1729. doi: 10.3390/foods10081729
Durante, L. M., Smith, R. O., Kolodzey, S., McMullin, R. M., Salmond, N. H., Schlieman, C. D., O'Connell-Milne, S. A., Frew, R. D., Van Hale, R., & Wing, S. R. (2021). Oceanographic transport along frontal zones forms carbon, nitrogen, and oxygen isoscapes on the east coast of New Zealand: Implications for ecological studies. Continental Shelf Research, 216, 104368. doi: 10.1016/j.csr.2021.104368
Zhu, D., Kebede, B., McComb, K., Hayman, A., Chen, G., & Frew, R. (2021). Milk biomarkers in relation to inherent and external factors based on metabolomics. Trends in Food Science & Technology, 109, 51-64. doi: 10.1016/j.tifs.2020.12.012
Sanchez, L. J., Zhu, D., Frew, R., & Kebede, B. (2021). Optimization of nuclear magnetic resonance and gas chromatography-mass spectrometry-based fingerprinting methods to characterize goat milk powder. Journal of Dairy Science, 104(1), 102-111. doi: 10.3168/jds.2020-18467
Diyabalanage, S., Kalpage, M. D., Mohotti, D. G., Dissanayake, C. K. K., Fernando, R., Frew, R. D., & Chandrajith, R. (2021). Comprehensive assessment of essential and potentially toxic trace elements in bovine milk and their feeds in different agro-climatic zones of Sri Lanka. Biological Trace Element Research, 199, 1377-1388. doi: 10.1007/s12011-020-02242-4
Conference Contribution - Published proceedings: Abstract
Sim, J., Frew, R., Oey, I., & Kebede, B. (2021). Linking coffee quality with terroir. Proceedings of the New Zealand Institute of Food Science & Technology (NZIFST) Conference: Food: With Care. S24. Retrieved from http://www.nzifst.org.nz/
Kodikara, K., Frew, R., & Hayman, A. (2021). Authentication of Mānuka honey by using compound-specific isotope techniques. Proceedings of the University of Otago Student Research Symposium: Te Wānaka Rakahau: Ākoka. (pp. 41). [Abstract]
Sim, J., Frew, R., Oey, I., & Kebede, B. (2021). Origin traceability of coffee and its flavours: Vibrational spectroscopy as a non-destructive technique. Proceedings of the University of Otago Student Research Symposium: Te Wānaka Rakahau: Ākoka. (pp. 56). [Abstract]
Huang, P.-J., McComb, K., Schofield, M., & Frew, R. (2021). Environmental influences of the isotopes and trace elemental composition of Japanese rice. Proceedings of the University of Otago Student Research Symposium: Te Wānaka Rakahau: Ākoka. (pp. 34). [Abstract]
2020
Journal - Research Article
Wijenayake, K., Frew, R., McComb, K., Van Hale, R., & Clarke, D. (2020). Feasibility of casein to record stable isotopic variation of cow milk in New Zealand. Molecules, 25(16), 3658. doi: 10.3390/molecules25163658
Zhu, D., Kebede, B., Chen, G., McComb, K., & Frew, R. (2020). Changes in milk metabolome during the lactation of dairy cows based on 1H-NMR and UHPLC-QToF/MS. International Dairy Journal, 111, 104836. doi: 10.1016/j.idairyj.2020.104836
Ellwood, M. J., Boyd, P. W., Cornwall, C. E., Croot, P., Currie, K. I., Frew, R. D., … Law, C., … McGraw, C. M., … Stirling, C., & Zitoun, R. (2020). Keith Hunter's legacy to marine science in New Zealand. Marine & Freshwater Research, 71(3), i-iii. doi: 10.1071/MFv71n3_ED
Durante, L. M., Sabadel, A. J. M., Frew, R. D., Ingram, T., & Wing, S. R. (2020). Effects of fixatives on stable isotopes of fish muscle tissue: Implications for trophic studies on preserved specimens. Ecological Applications, 30(4), e02080. doi: 10.1002/eap.2080
Zhu, D., Kebede, B., Chen, G., McComb, K., & Frew, R. (2020). Effects of the vat pasteurization process and refrigerated storage on the bovine milk metabolome. Journal of Dairy Science, 103, 2077-2088. doi: 10.3168/jds.2019-17512
Frew, R. D., Adu, T., Gault-Ringold, M., Hamidian, A., Currie, K. I., Armstrong, E., & Hunter, K. A. (2020). Strong seasonality in the cadmium and phosphate cycling at the subtropical convergence, south-eastern New Zealand. Marine & Freshwater Research, 71, 345-354. doi: 10.1071/MF19216
Zhu, D., Kebede, B., Chen, G., McComb, K., & Frew, R. (2020). Impact of freeze-drying and subsequent storage on milk metabolites based on 1H NMR and UHPLC-QToF/MS. Food Control, 116, 107017. doi: 10.1016/j.foodcont.2019.107017
Holder, P. W., Van Hale, R. J., Frew, R., George, S., & Armstrong, K. F. (2020). Natal origin of the invasive biosecurity pest, brown marmorated stink bug (Halyomorpha halys: Penatomidae), determined by dual-element stable isotope-ratio mass spectrometry. Pest Management Science, 76, 1456-1463. doi: 10.1002/ps.5659
Conference Contribution - Published proceedings: Abstract
Beltran, C., Ohneiser, C., Moy, C., Riesselman, C., Kerr, G., Armstrong, E., & Frew, R. (2020). The University of Otago Organic Geochemistry Research Facility: A new Research Centre for Paleoenvironment and Paleoclimate studies focussed on the Southern Ocean and Antarctica. In K. N. Bassett, A. R. L. Nichols & C. H. Fenton (Eds.), Geoscience Society of New Zealand Miscellaneous Publication. 157A, (pp. 39). Wellington, New Zealand: Geoscience Society of New Zealand. [Abstract]
2019
Journal - Research Article
McComb, K., Sarker, S., and also Hoogewerff, J., Hayman, A., & Frew, R. (2019). A δ2H Isoscape of blackberry as an example application for determining the geographic origins of plant materials in New Zealand. PLoS ONE, 14(12), e0226152. doi: 10.1371/journal.pone.0226152
Zhu, D., Hayman, A., Kebede, B., Stewart, I., Chen, G., & Frew, R. (2019). 31P NMR-based phospholipid fingerprinting of powdered infant formula. Journal of Agricultural & Food Chemistry, 67(36), 10265-10272. doi: 10.1021/acs.jafc.9b03902
Udy, J. A., Wing, S. R., O'Connell-Milne, S. A., Durante, L. M., McMullin, R. M., Kolodzey, S., & Frew, R. D. (2019). Regional differences in supply of organic matter from kelp forests drive trophodynamics of temperate reef fish. Marine Ecology Progress Series, 621, 19-32. doi: 10.3354/meps12974
Sabadel, A. J. M., Van Oostende, N., Ward, B. B., Woodward, E. M. S., Van Hale, R., & Frew, R. D. (2019). Characterization of particulate organic matter cycling during a summer North Atlantic phytoplankton bloom using amino acid C and N stable isotopes. Marine Chemistry, 214, 103670. doi: 10.1016/j.marchem.2019.103670
Udy, J., Wing, S., O'Connell-Milne, S., Kolodzey, S., McMullin, R., Durante, L., & Frew, R. (2019). Organic matter derived from kelp supports a large proportion of biomass in temperate rocky reef fish communities: Implications for ecosystem-based management. Aquatic Conservation, 29, 1503-1519. doi: 10.1002/aqc.3101
Wakefield, J., McComb, K., Ehtesham, E., Van Hale, R., Barr, D., Hoogewerff, J., & Frew, R. (2019). Chemical profiling of saffron for authentication of origin. Food Control, 106, 106699. doi: 10.1016/j.foodcont.2019.06.025
Van Hale, R., Schofield, M., Connor, M., Barker, R., & Frew, R. (2019). Stable isotope measurements to differentiate sources of monofluoroacetate in a blackmail case. Rapid Communications in Mass Spectrometry, 33, 839-847. doi: 10.1002/rcm.8416
Babaranti, O., Horn, S., Jowett, T., & Frew, R. (2019). Isotopic signatures in Mytilus galloprovincialis and Ulva latuca as bioindicators for assessing discharged sewage effluent in coastal waters along Otago Peninsula, New Zealand. Geology, Ecology & Landscapes, 3(1), 53-64. doi: 10.1080/24749508.2018.1485079
Journal - Research Other
Van Hale, R. J., Holder, P. W., Harrison, J. D. S., & Frew, R. D. (2019). Extending the limit of measurement for dual H and O isotope ratios using thermolysis. Analytical Chemistry, 91, 13367-13371. doi: 10.1021/acs.analchem.9b03131
Conference Contribution - Published proceedings: Abstract
Sanchez, L. J., Zhu, D., Frew, R., & Kebede, B. (2019). Chemical fingerprinting and authentication of New Zealand goat and sheep milk powder using 1H-NMR and multivariate data analysis. Proceedings of the New Zealand Institute of Food Science & Technology (NZIFST) Conference: Good Food 4. S9. Retrieved from http://www.nzifst.org.nz
Zhu, D., Chen, G., Kebede, B., & Frew, R. (2019). Untargeted metabolomic study on milk geographic origin discrimination using 1 H-NMR and UPLC-QTOF-MS combined with multivariate data analysis. Proceedings of the New Zealand Institute of Food Science & Technology (NZIFST) Conference: Good Food 4. S4. Retrieved from http://www.nzifst.org.nz
2018
Journal - Research Article
Gorman, A. R., Vennell, R., Holbrook, W. S., & Frew, R. (2018). Seismic characterization of oceanic water masses, water mass boundaries and mesoscale eddies SE of New Zealand. Journal of Geophysical Research: Oceans, 123(2), 1519-1532. doi: 10.1002/2017JC013459
Conference Contribution - Published proceedings: Abstract
Tohi, M., Frew, R., Van Hale, R., & McComb, K. (2018). Geolocation of cotton using stable isotope profiling. Proceedings of the 14th Australasian Environmental Isotope Conference (AEIC). Retrieved from http://www.confer.co.nz/aeic2018/
Wijenayake, K., & Frew, R. (2018). Quality control materials for H(deuterium) isotopic measurements. Proceedings of the 14th Australasian Environmental Isotope Conference (AEIC). Retrieved from http://www.confer.co.nz/aeic2018/
Sabadel, A., Van Oostende, N., Ward, B., Woodward, E. M. S., Van Hale, R., & Frew, R. (2018). Characterisation of particulate organic matter cycling during a summer North Atlantic phytoplankton bloom using compound-specific stable isotopes of amino acids. Proceedings of the 14th Australasian Environmental Isotope Conference (AEIC). Retrieved from http://www.confer.co.nz/aeic2018/
Durante, L., Ingram, T., Frew, R., & Wing, S. (2018). A new method to access isotopic signatures on preserved fish specimens. Biodiversity Information Science & Standards, 2, e26597. doi: 10.3897/biss.2.26597
2017
Journal - Research Article
Sabadel, A. J. M., Browning, T. J., Kruimer, D., Airs, R. L., Woodward, E. M. S., Van Hale, R., & Frew, R. D. (2017). Determination of picomolar dissolved free amino acids along a South Atlantic transect using reversed-phase high-performance liquid chromatography. Marine Chemistry, 196, 173-180. doi: 10.1016/j.marchem.2017.09.008
Wing, S. R., Gault-Ringold, M., Stirling, C. H., Wing, L. C., Shatova, O. A., & Frew, R. D. (2017). δ56Fe in seabird guano reveals extensive recycling of iron in the Southern Ocean ecosystem. Limnology & Oceanography, 62(4), 1671-1681. doi: 10.1002/lno.10524
Rajapaksha, D., Waduge, V., Padilla‐Alvarez, R., Kalpage, M., Rathnayake, R. M. N. P., Migliori, A., Frew, R., … Amarakoon, T. (2017). XRF to support food traceability studies: Classification of Sri Lankan tea based on their region of origin. X-Ray Spectrometry, 46(4), 220-224. doi: 10.1002/xrs.2748
Li, Q., Zhao, Y., Zhu, D., Pang, X., Liu, Y., Frew, R., & Chen, G. (2017). Lipidomics profiling of goat milk, soymilk and bovine milk by UPLC-Q-Exactive Orbitrap Mass Spectrometry. Food Chemistry, 224, 302-309. doi: 10.1016/j.foodchem.2016.12.083
Li, Q., Yu, Z., Zhu, D., Meng, X., Pang, X., Liu, Y., Frew, R., … Chen, G. (2017). The application of NMR-based milk metabolite analysis in milk authenticity identification. Journal of the Science of Food & Agriculture, 97(9), 2875-2882. doi: 10.1002/jsfa.8118
Conference Contribution - Published proceedings: Full paper
Jandrić, Z., Frew, R. D., Fernandez-Cedi, L. N., & Cannavan, A. (2017). An investigative study on discrimination of honey of various floral and geographical origins using UPLC-QToF MS and multivariate data analysis. Food Control, 72(Part B), (pp. 189-197). doi: 10.1016/j.foodcont.2015.10.010
Conference Contribution - Published proceedings: Abstract
Connor, M., & Frew, R. (2017). An attempt to blackmail the New Zealand government by contaminating infant formula with 1080 poison. Forensic Science International, 277(Suppl. 1 ), (pp. 161). doi: 10.1016/j.forsciint.2017.07.019
Babaranti, O. A., Horn, S., Frew, R. D., & Van Hale, R. (2017). Isotopic signatures in the tissues of Mytilus galloprovincialis and Ulva latuca as bio-indicators for assessing the impact of discharged sewage effluent on the nearshore coastal marine ecosystem along Otago Peninsula, New Zealand. Proceedings of the 11th Otago Energy Research Centre (OERC) Symposium and Ag@Otago Colloquium. (pp. 13-14). Retrieved from http://www.otago.ac.nz/oerc/index.html
2016
Journal - Research Article
Li, Q., Meng, X., Zhu, D., Pang, X., Wang, K., Frew, R., & Chen, G. (2016). Determination of nonprotein nitrogen components of milk by nuclear magnetic resonance. Analytical Letters, 49(18), 2953-2963. doi: 10.1080/00032719.2016.1164180
Sabadel, A. J. M., Woodward, E. M. S., Van Hale, R., & Frew, R. D. (2016). Compound-specific isotope analysis of amino-acids: A tool to unravel complex symbiotic trophic relationships. Food Webs, 6, 9-18. doi: 10.1016/j.fooweb.2015.12.003
Nielsen, J. A., Frew, R. D., Whigham, P. A., Callaway, R. M., & Dickinson, K. J. M. (2016). Thyme travels: 15N isoscapes of Thymus vulgaris L. invasion in lightly grazed pastoral communities. Austral Ecology, 41(1), 28-39. doi: 10.1111/aec.12284
Conference Contribution - Published proceedings: Full paper
Baisden, W. T., Keller, E. D., Van Hale, R., Frew, R. D., & Wassenaar, L. I. (2016). Precipitation isoscapes for New Zealand: Enhanced temporal detail using precipitation-weighted daily climatology. Isotopes in Environmental and Health Studies, 52(4-5), (pp. 343-352). doi: 10.1080/10256016.2016.1153472
Conference Contribution - Published proceedings: Abstract
van Klink, J. W., Sansom, C. E., Joyce, N. I., Perry, N. B., Frew, R. D., Cross, S. A., & Goodwin, R. M. (2016). Pure Mānuka honeys: Production and characteristics. Proceedings of the New Zealand Institute of Chemistry (NZIC) Conference. Retrieved from http://www.nzic16.org/
2015
Journal - Research Article
Parr, E. B., Cotter, J. D., Frew, R. D., & Rehrer, N. J. (2015). Muscle glycogen dominates females fuel usage in moderately intensive endurance exercise even in the cold. Annals of Sports Medicine & Research, 2(3), 1021.
Ehtesham, E., Hayman, A., Van Hale, R., & Frew, R. (2015). Influence of feed and water on the stable isotopic composition of dairy milk. International Dairy Journal, 47, 37-45. doi: 10.1016/j.idairyj.2015.02.008
Nielsen, J. A., Whigham, P. A., Frew, R. D., Callaway, R. M., & Dickinson, K. J. M. (2015). Thyme and space invasion: Thymus vulgaris decreases exotic plant species diversity in Central Otago, New Zealand. Biological Invasions, 17(8), 2261-2274. doi: 10.1007/s10530-015-0872-9
Muhammad, S. A., Frew, R. D., & Hayman, A. R. (2015). Compound-specific isotope analysis of diesel fuels in a forensic investigation. Frontiers in Chemistry, 3, 12. doi: 10.3389/fchem.2015.00012
Jandrić, Z., Haughey, S. A., Frew, R. D., McComb, K., Galvin-King, P., Elliott, C. T., & Cannavan, A. (2015). Discrimination of honey of different floral origins by a combination of various chemical parameters. Food Chemistry, 189, 52-59. doi: 10.1016/j.foodchem.2014.11.165
Holder, P. W., Frew, R., & Van Hale, R. (2015). The geographic origin of an intercepted biosecurity pest beetle assigned using hydrogen stable isotopes. Journal of Economic Entomology, 108(2), 834-837. doi: 10.1093/jee/tou097
Nielsen, J. A., Frew, R. D., Whigham, P. A., Callaway, R. M., & Dickinson, K. J. M. (2015). Germination and growth responses of co-occurring grass species to soil from under invasive Thymus vulgaris. Allelopathy, 35(1), 139-152.
Sander, S. G., Tian, F., Ibisanmi, E. B., Currie, K. I., Hunter, K. A., & Frew, R. D. (2015). Spatial and seasonal variation of the iron speciation in surface waters of the Subantarctic front and the Otago Continental Shelf. Marine Chemistry, 173, 114-124. doi: 10.1016/j.marchem.2014.09.001
Muhammad, S. A., Hayman, A. R., Van Hale, R., & Frew, R. D. (2015). Assessing carbon and hydrogen isotopic fractionation of diesel fuel n-alkanes during progressive evaporation. Journal of Forensic Sciences, 60(S1), S56-S65. doi: 10.1111/1556-4029.12551
2014
Journal - Research Article
Wing, S. R., Jack, L., Shatova, O., Leichter, J. J., Barr, D., Frew, R. D., & Gault-Ringold, M. (2014). Seabirds and marine mammals redistribute bioavailable iron in the Southern Ocean. Marine Ecology Progress Series, 510, 1-13. doi: 10.3354/meps10923
Nielsen, J. A., Frew, R. D., Whigham, P. A., Callaway, R. M., & Dickinson, K. J. M. (2014). Thyme invasion and soil properties in the Central Otago region of New Zealand. Geoderma Regional, 1, 48-58. doi: 10.1016/j.geodrs.2014.08.002
Holder, P. W., Armstrong, K., Van Hale, R., Millet, M.-A., Frew, R., Clough, T. J., & Baker, J. A. (2014). Isotopes and trace elements as natal origin markers of Helicoverpa armigera: An experimental model for biosecurity pests. PLoS ONE, 9(3), e92384. doi: 10.1371/journal.pone.0092384
Nielsen, J. A., Whigham, P. A., Frew, R. D., Callaway, R. M., & Dickinson, K. J. M. (2014). Invasion essentials: Does secondary chemistry plasticity contribute to the invasiveness of Thymus vulgaris L.? Chemoecology, 24(1), 15-27. doi: 10.1007/s00049-013-0142-1
Conference Contribution - Published proceedings: Full paper
Muhammad, S. A., Frew, R. D., & Hayman, A. R. (2014). Compound-specific isotope analysis of diesel fuels in a forensic investigation. In A. Z. Aris, T. H. Tengku Ismail, R. Harun, A. M. Abdullah & M. Y. Ishak (Eds.), From sources to solution: Proceedings of the International Conference on Environmental Forensics 2013. (pp. 137-142). Singapore: Springer. doi: 10.1007/978-981-4560-70-2_26
Conference Contribution - Published proceedings: Abstract
Cannavan, A., Frew, R., & Jandric, Z. (2014). Application of stable isotope measurements and metabolomics for traceability and authenticity of milk, fruit juices, and honey. Proceedings of the 248th American Chemical Society (ACS) National Meeting and Exposition. 75. ACS. Retrieved from http://www.acs.org/content/acs/en/meetings.html
Conference Contribution - Poster Presentation (not in published proceedings)
Sabadel, A. J., Woodward, E. M., Van Hale, R., Frew, R. D., & Boyd, P. W. (2014, February). Amino acids along a South Atlantic transect (40 SS). Poster session presented at the Ocean Sciences Meeting, Honolulu, USA.
2013
Chapter in Book - Research
McComb, K., & Frew, R. (2013). Using new analytical approaches to verify the origin of honey. In P. Brereton (Ed.), New analytical approaches for verifying the origin of food. (pp. 216-242). Cambridge, UK: Woodhead. doi: 10.1533/9780857097590.3.216
Journal - Research Article
McLeod, R. J., Garland, M., Van Hale, R., Steiman, S., & Frew, R. D. (2013). Determining the most effective combination of chemical parameters for differentiating the geographic origin of food products: An example using coffee beans. Journal of Food Chemistry & Nutrition, 1(2), 49-61.
Muhammad, S. A., Frew, R. D., & Hayman, A. R. (2013). Forensic differentiation of diesel fuels using hydrocarbon isotope fingerprints. Central European Geology, 56(1), 19-37. doi: 10.1556/CEuGeol.56.2013.1.3
Ehtesham, E., Hayman, A. R., McComb, K. A., Van Hale, R., & Frew, R. D. (2013). Correlation of geographical location with the stable isotope values of hydrogen and carbon of fatty acids from New Zealand milk and bulk milk powder. Journal of Agricultural & Food Chemistry, 61(37), 8914-8923. doi: 10.1021/jf4024883
Frew, R., McComb, K., Croudis, L., Clark, D., & Van Hale, R. (2013). Modified sugar adulteration test applied to New Zealand honey. Food Chemistry, 141(4), 4127-4131. doi: 10.1016/j.foodchem.2013.06.124
Benbow, T. J., Hayman, A. R., Van Hale, R., & Frew, R. (2013). Preparation of aqueous fatty acids for hydrogen and carbon stable isotope analysis by solid phase extraction. Marine & Freshwater Research, 64(4), 294-302. doi: 10.1071/MF12192
McLeod, R. J., Hyndes, G. A., Hurd, C. L., & Frew, R. D. (2013). Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod. Marine Ecology Progress Series, 479, 1-12. doi: 10.3354/meps10327
Ehtesham, E., Baisden, W. T., Keller, E. D., Hayman, A. R., Van Hale, R., & Frew, R. D. (2013). Correlation between precipitation and geographical location of the δ2H values of the fatty acids in milk and bulk milk powder. Geochimica et Cosmochimica Acta, 111, 105-116. doi: 10.1016/j.gca.2012.10.026
Conference Contribution - Published proceedings: Abstract
Frew, R., Cannavan, A., Zandric, Z., Maestroni, B., & Abrahim, A. (2013). A coordinated research project on the implementation of nuclear techniques to improve food traceability. Geophysical Research Abstracts, 15, EGU2013-9092. [Abstract]
Mullungal, M. N., Van Hale, R., Frew, R. D., & Law, C. S. (2013). Nitrous oxide cycling and its isotopic signatures in south west Pacific Ocean. Proceedings of the American Geophysical Union (AGU) 46th Annual Fall Meeting. Retrieved from http://fallmeeting.agu.org/2013/
Harvey, C. R., Kraakman, M. J., Frew, R. D., Péronnet, F., & Rehrer, N. J. (2013). Effect of breakfast feeding on plasma glucose oxidation during treadmill running. Medicine & Science in Sports & Exercise, 45(5, Suppl. 1), (pp. 211). doi: 10.1249/01.mss.0000431822.62200.65
Frew, R., Van Hale, R., Clark, D., Abrahim, A., Resch, C., Mayr, L., … Gröning, M. (2013). Developing potential new reference materials for light isotopes in foodstuffs. Geophysical Research Abstracts, 15, 9025. [Abstract]
Other Research Output
Frew, R. (2013, July). Stable isotope deltas: Using natures tiny signatures to make connections in food and forensics. University of Otago, Dunedin, New Zealand. [Inaugural Professorial Lecture].
2012
Journal - Research Article
Fitzsimons, S., Mager, S., Frew, R., Clifford, A., & Wilson, G. (2012). Formation of ice-shelf moraines by accretion of sea water and marine sediment at the southern margin of the McMurdo Ice Shelf, Antarctica. Annals of Glaciology, 53(60), 211-220. doi: 10.3189/2012AoG60A155
Strzepek, R. F., Hunter, K. A., Frew, R. D., Harrison, P. J., & Boyd, P. W. (2012). Iron-light interactions differ in Southern Ocean phytoplankton. Limnology & Oceanography, 57(4), 1182-1200. doi: 10.4319/lo.2012.57.4.1182
Fukuda, K., Thomas, D. B., Frew, R. D., & Fordyce, R. E. (2012). Antarctic glaciation recorded in Early Miocene New Zealand foraminifera. Marine Micropaleontology, 92–93, 52-60. doi: 10.1016/j.marmicro.2012.05.002
Gault-Ringold, M., Adu, T., Stirling, C. H., Frew, R. D., & Hunter, K. A. (2012). Anomalous biogeochemical behavior of cadmium in subantarctic surface waters: Mechanistic constraints from cadmium isotopes. Earth & Planetary Science Letters, 341–344, 94-103. doi: 10.1016/j.epsl.2012.06.005
Smith, I. J., Langhorne, P. J., Frew, R. D., Vennell, R., & Haskell, T. G. (2012). Sea ice growth rates near ice shelves. Cold Regions Science & Technology, 83-84, 57-70. doi: 10.1016/j.coldregions.2012.06.005
Hepburn, C. D., Frew, R. D., & Hurd, C. L. (2012). Uptake and transport of nitrogen derived from sessile epifauna in the giant kelp Macrocystis pyrifera. Aquatic Biology, 14(2), 121-128. doi: 10.3354/ab00382
Wing, S. R., McLeod, R. J., Leichter, J. J., Frew, R. D., & Lamare, M. D. (2012). Sea ice microbial production supports Ross Sea benthic communities: Influence of a small but stable subsidy. Ecology, 93(2), 314-323. doi: 10.1890/11-0996.1
Conference Contribution - Published proceedings: Abstract
Strzepek, R. F., Hunter, K. A., Frew, R. D., Harrison, P. J., & Boyd, P. W. (2012). Absence of iron-light co-limitation in southern ocean phytoplankton. Proceedings of the Ocean Sciences Meeting. (pp. 445). Retrieved from http://www.sgmeet.com/osm2012/
Sabadel, A. J., Van Hale, R., Boyd, P. W., & Frew, R. D. (2012). From onshore to offshore: Using amino acids to trace the marine-terrestrial exchange. Proceedings of the Ocean Sciences Meeting. (pp. 400). Retrieved from http://www.sgmeet.com/osm2012/
Bulbul, A., Frew, R., Strzepek, R., & Hunter, K. (2012). The activity of carbonic anhydrase (CA) enzyme in marine diatoms. Proceedings of the 3rd International Symposium on the Ocean in a High-CO2 World: Ocean Acidification. (pp. 129). Retrieved from http://ocean-acidification.net/international-symposia/2012-symposium-on-the-ocean-in-a-high-co2-world/
Frew, R., Emad Ehteshamrad, R., Van Hale, R., Hayman, A., & Baisden, T. (2012). Effect of precipitation, geographical location and biosynthesis on New Zealand milk powder bulk and fatty acids D/H ratio. Geophysical Research Abstracts, 14, EGU2012-6098. [Abstract]
Smith, I., Langhorne, P., Leonard, G., Trodahl, J., Gough, A., Frew, R., Van Hale, R., Mahoney, A., & Haskell, T. (2012). Sea ice growth rates near Antarctic ice shelves. Proceedings of the XXXII SCAR and Open Science Conference & COMNAP XXIV AGM. Retrieved from http://scar2012.geol.pdx.edu/
Conference Contribution - Verbal presentation and other Conference outputs
Smith, I. J., Langhorne, P. J., Leonard, G. H., Trodahl, H. J., Gough, A. J., Frew, R. D., Van Hale, R., Mahoney, A. R., & Haskell, T. G. (2012, October). Sea ice growth rates in McMurdo Sound. Verbal presentation at the Annual Antarctic Conference: Looking to the Future, Christchurch, New Zealand.
Smith, I. J., Langhorne, P. J., Leonard, G. H., Trodahl, H. J., Gough, A. J., Frew, R. D., Van Hale, R., Mahoney, A. R., & Haskell, T. G. (2012, February). Antarctic sea ice growth rates: What can measurement of hydrogen and oxygen isotopes tell us? Verbal presentation at the New Zealand Sea Ice Symposium, Wellington, New Zealand.
2011
Journal - Research Article
Strzepek, R. F., Maldonado, M. T., Hunter, K. A., Frew, R. D., & Boyd, P. W. (2011). Adaptive strategies by Southern Ocean phytoplankton to lessen iron limitation: Uptake of organically complexed iron and reduced cellular iron requirements. Limnology & Oceanography, 56(6), 1983-2002. doi: 10.4319/lo.2011.56.6.1983
Stokes, M. D., Leichter, J. J., Wing, S., & Frew, R. (2011). Temperature variability and algal isotopic heterogeneity on a Floridian coral reef. Marine Ecology, 32(3), 364-379. doi: 10.1111/j.1439-0485.2011.00469.x
Leonard, G. H., Langhorne, P. J., Williams, M. J. M., Vennell, R., Purdie, C. R., Dempsey, D. E., … Frew, R. D. (2011). Evolution of supercooling under coastal Antarctic sea ice during winter. Antarctic Science, 23(4), 399-409. doi: 10.1017/s0954102011000265
Thomas, D. B., McGoverin, C. M., Fordyce, R. E., Frew, R. D., & Gordon, K. C. (2011). Raman spectroscopy of fossil bioapatite: A proxy for diagenetic alteration of the oxygen isotope composition. Palaeogeography, Palaeoclimatology, Palaeoecology, 310, 62-70. doi: 10.1016/j.palaeo.2011.06.016
Conference Contribution - Published proceedings: Abstract
Smith, I. J., Langhorne, P. J., Leonard, G. H., Trodahl, H. J., Gough, A. J., Frew, R. D., Mahoney, A. R., & Haskell, T. G. (2011). Rates of change of sea-ice thickness in the vicinity of an Antarctic ice shelf. Proceedings of the International Glaciological Society (IGS)/Forum for Research into Ice Shelf Processes (FRISP) Symposium on Interactions of Ice Sheets and Glaciers with the Ocean. Retrieved from http://glaciology2.ucsd.edu/igs2011/programme/Proceedings_59/Procsfiles/ProcAbstracts.html#A006
Mullungal, M. N., Van Hale, R., Frew, R. D., & Law, C. (2011). Is there a green house around New Zealand from oceanic N2O emissions? Proceedings of the New Zealand Marine Sciences Society (NZMSS) Conference: Understanding, Managing, and Conserving our Marine Environment. (pp. 42-43). Retrieved from http://nzmss.org/assets/Conference/NZMSS2011AbstractsPosterPresentations.pdf
Bulbul, A., Frew, R., Strzepek, R., & Hunter, K. (2011). The activity of carbonic anhydrase (CA) enzyme in marine diatoms. Proceedings of the New Zealand Marine Sciences Society (NZMSS) Conference: Understanding, Managing, and Conserving our Marine Environment. (pp. 4). Retrieved from http://nzmss.org/assets/Conference/NZMSS2011AbstractsOralPresentations.pdf
Adu, T., Frew, R. D., & Hunter, K. (2011). Pragmatic investigation of seasonal variation in cadmium to phosphate ratio in the subantarctic section of the Munida Transect. Proceedings of the New Zealand Marine Sciences Society (NZMSS) Conference: Understanding, Managing, and Conserving our Marine Environment. (pp. 1). Retrieved from http://nzmss.org/assets/Conference/NZMSS2011AbstractsOralPresentations.pdf
Sander, S., Tian, F., Ibisanmi, E., Currie, K., Frew, R., & Hunter, K. A. (2011). Spatial and temporal variation of the iron speciation in surface waters of the Otago Continental Shelf. Proceedings of the New Zealand Marine Sciences Society (NZMSS) Conference: Understanding, Managing and Conserving our Marine Environment. (pp. 25). Retrieved from http://nzmss.org/assets/Conference/NZMSS2011AbstractsOralPresentations.pdf
Gault-Ringold, M., Strzepek, R., Stirling, C. H., Frew, R. D., & Hunter, K. A. (2011). Cadmium isotopic composition in cultured marine phytoplankton. Mineralogical Magazine, 75(3), (pp. 898). [Abstract]
Mahoney, A., Gough, A., Langhorne, P., Robinson, N., Stevens, C., Williams, M. J. M., … Frew, R. (2011). The seasonal arrival of ice shelf water in McMurdo Sound and its effect on sea ice growth. Proceedings of the New Zealand Snow and Ice Research Group (SIRG) Annual Workshop. (pp. 22). Retrieved from http://www.sirg.org.nz/abstracts/SIRG2011FoxGlacier_Programme.pdf
Smith, I. J., Langhorne, P. J., Leonard, G. H., Gough, A. J., Frew, R. D., Trodahl, H. J., Mahoney, A. R., & Haskell, T. G. (2011). Sea ice thicknesses: Results from the 2010 Antarctic winter. Proceedings of the New Zealand Snow and Ice Research Group (SIRG) Annual Workshop. (pp. 21). Retrieved from http://www.sirg.org.nz/abstracts/SIRG2011FoxGlacier_Programme.pdf
Gough, A. J., Mahoney, A. R., Langhorne, P. J., Williams, M. J. M., Frew, R. D., & Haskell, T. G. (2011). Multi-year sea ice in McMurdo Sound: Insights into snow ice and brine migration. Proceedings of the New Zealand Snow and Ice Research Group (SIRG) Annual Workshop. (pp. 17). Retrieved from http://www.sirg.org.nz/abstracts/SIRG2011FoxGlacier_Programme.pdf
Conference Contribution - Poster Presentation (not in published proceedings)
Sarker, S., Frew, R. D., & Hayman, A. R. (2011, November-December). Developing geochemical tools for provenancing cannabis. Poster session presented at the New Zealand Institute of Chemistry (NZIC) Conference, Hamilton, New Zealand.
Ehtesham, E. R., Van Hale, R., Hayman, A. R., & Frew, R. (2011, September). Effect of precipitation, geographical location and biosynthesis on New Zealand milk powder bulk and fatty acids D/H ratios. Poster session presented at the Studium Conference: Hydrogen Isotopes as Environmental Recorders, Orléans, France.
Adu, T., Frew, R. D., & Hunter, K. A. (2011, February). Influence of bioactive trace metals on cadmium/phosphate ratio and primary productivity in water masses around subtropical front, southeast New Zealand. Poster session presented at the ASLO Aquatic Sciences Meeting: Limnology & Oceanography in a Changing World, San Juan, Puerto Rico.
Conference Contribution - Verbal presentation and other Conference outputs
Muhammad, S., Hayman, A. R., Van Hale, R., & Frew, R. (2011, November). Traceability of diesel through the isotopic fingerprinting of n-alkanes. Verbal presentation at the GOTRACE Symposium: Assuring Food Integrity, Wellington, New Zealand.
Ehtesham Rad, E., Van Hale, R., Hayman, A. R., & Frew, R. D. (2011, November). Effect of precipitation, geographical location and biosynthesis on New Zealand milk powder bulk and fatty acids D/H ratios. Verbal presentation at the GOTRACE Symposium: Assuring Food Integrity, Wellington, New Zealand.
Smith, I., Langhorne, P., Leonard, G., Trodahl, J., Gough, A., Frew, R., … Mahoney, A., & Haskell, T. (2011, October). Antarctic sea ice: How quickly does it grow? Verbal presentation at the 15th New Zealand Institute of Physics (NZIP) Conference, Wellington, New Zealand.
Frew, R. D. (2011, August). Commanding the premium by authenticating origin. Verbal presentation at the US-NZ Science and Technology International Workshop on Postharvest Innovation, Dunedin, New Zealand.
2010
Journal - Research Article
David, G. E., Coxon, A., Frew, R. D., & Hayman, A. R. (2010). Isotope fractionation during precipitation of methamphetamine HCI and discrimination of seized forensic samples. Forensic Science International, 200, 123-129. doi: 10.1016/j.forsciint.2010.03.043
Van Hale, R., & Frew, R. D. (2010). Rayleigh distillation equations applied to isotopic evolution of organic nitrogen across a continental shelf. Marine & Freshwater Research, 61(3), 369-378. doi: 10.1071/mf09041
David, G. E., Hibbert, D. B., Frew, R. D., & Hayman, A. R. (2010). Significant determinants of isotope composition during HI/Pred synthesis of methamphetamine. Australian Journal of Chemistry, 63(1), 22-29.
Dempsey, D. E., Langhorne, P. J., Robinson, N. J., Williams, M. J. M., Haskell, T. G., & Frew, R. D. (2010). Observation and modeling of platelet ice fabric in McMurdo Sound, Antarctica. Journal of Geophysical Research, 115, C01007. doi: 10.1029/2008jc005264
Conference Contribution - Published proceedings: Abstract
Muhammad, S., Hayman, A., Van Hale, R., & Frew, R. (2010). Compound-specific IRMS of n-alkanes for fingerprinting stolen diesel. Proceedings of the Forensic Isotope Ratio Mass Spectrometry (FIRMS) Conference. Retrieved from http://www.forensic-isotopes.org/conference/conf2010/conf2010.html
Frew, R. (2010). Case histories in understanding the origin of food. Proceedings of the Institute of Food Technologists (IFT) Annual Meeting and Food Expo. Retrieved from http://www.abstractsonline.com/plan/AdvancedSearch.aspx
Gault-Ringold, M., Stirling, C. H., Frew, R., & Hunter, K. A. (2010). Isotopic composition of cadmium across the subtropical convergence in the Southern Ocean. Proceedings of the American Geophysical Union (AGU) Fall Meeting. Retrieved from http://www.agu.org/meetings/fm10/waisfm10.html
Nielsen, J. A., Dickinson, K. J. M., Whigham, P. A., Frew, R. D., & Callaway, R. M. (2010). How above- and below-ground ecological linkages combine to influence plant population abundance and community organisation in thyme (Thymus vulgaris, Labitae) stands across Central Otago. New Zealand Ecological Society Annual Conference: Biodiversity: 2010 and Beyond. (pp. 92-93). Retrieved from http://www.nzesconference.org.nz/programme
Smith, I. J., Langhorne, P. J., Gough, A. J., Frew, R. D., Mahoney, A. R., & Haskell, T. G. (2010). Determining the location of a growing sea ice-water interface through the use of temperature sensors and other methods. Proceedings of the Annual Antarctic Conference: A Taste of the Ice. (pp. 65). Christchurch, New Zealand: Antarctica New Zealand. [Abstract]
Gongol, C., Savage, C., Probert, K., & Frew, R. (2010). Rates of denitrification and sediment-water fluxes of oxygen in four New Zealand estuaries. Proceedings of the New Zealand Marine Sciences Society 50th Anniversary Conference. (pp. 13). NZMSS. Retrieved from www.nzmss.org/conference
Smith, I. J., Langhorne, P. J., Gough, A. J., Frew, R. D., Mahoney, A. R., & Haskell, T. G. (2010). Measurement of rates of increase in sea ice thicknesses: A fieldwork-based comparison of techniques. International Glaciological Society International Symposium on Sea Ice in the Physical and Biogeochemical System. IGS. Retrieved from http://www.igs2010.org/index.html
Smith, I. J., Langhorne, P. J., Leonard, G. H., Gough, A. J., Frew, R. D., Mahoney, A. R., & Haskell, T. G. (2010). Sea ice thickness: Measurement techniques used in the field. Proceedings of the New Zealand Snow and Ice Research Group (SIRG) Annual Workshop. (pp. 36). Retrieved from http://www.sirg.org.nz/
2009
Chapter in Book - Research
Sander, S. G., Hunter, K., & Frew, R. (2009). Sampling and measurements of trace metals in seawater. In O. Wurl (Ed.), Practical guidelines for the analysis of seawater. (pp. 305-327). Boca Raton, FL: CRC Press.
Journal - Research Article
Mitchell, M., Craw, D., Landis, C. A., & Frew, R. (2009). Stratigraphy, provenance, and diagenesis of the Cretaceous Horse Range Formation, east Otago, New Zealand. New Zealand Journal of Geology & Geophysics, 52(3), 171-183. doi: 10.1080/00288300909509884
Mager, S., Fitzsimons, S., Frew, R., Samyn, D., & Lorrain, R. (2009). Composition and origin of amber ice and its influence on the behaviour of cold glaciers in the McMurdo Dry Valleys, Antarctica. Journal of Glaciology, 55(190), 363-372. doi: 10.3189/002214309788608688
Conference Contribution - Published proceedings: Abstract
Gault-Ringold, M., Stirling, C., Frew, R., & Hunter, K. (2009). Cadmium isotopic compositions and nutrients cycling in the Southern Ocean. Geochimica et Cosmochimica Acta, 73(17), (pp. A418). [Abstract]
Gongol, C., Savage, C., Probert, K., & Frew, R. (2009). Quantifying rates of sedimentary denitrification in southern New Zealand estuaries. New Zealand Marine Sciences Society Review. 50, (pp. 150). [Abstract]
Muhammad, S. A., Frew, R. D., & Hayman, A. R. (2009). Validation of sample preparation methods in oil spill study prior to compound specific isotope analysis. Proceedings of the 24th International Meeting on Organic Geochemistry. (pp. 189). Bremen, Germany: University of Bremen - MARUM. [Abstract]
Thomas, D. B., Frew, R. D., & Fordyce, R. E. (2009). Evolution of the humeral plexus in penguins. In D. Barrell & A. Tulloch (Eds.), Geological Society of New Zealand Miscellaneous Publication. 128A, (pp. 208). Wellington, New Zealand: GSNZ. [Abstract]
Thomas, D. B., McGoverin, C. M., Fordyce, R. E., Frew, R. D., & Gordon, K. C. (2009). Analytical quality of fossil bone established using Raman spectroscopy. GNS Science Miscellaneous Series. 16, (pp. 131). [Abstract]
Mager, S., Fitzsimons, S., Frew, R., & Lorrain, R. (2009). Evidence for the interaction between cold-based glaciers and permafrost. Proceedings of the 7th International Conference on Geomorphology (ANZIAG): Ancient Landscapes, Modern Perspectives. Australian and New Zealand Geomorphology Group. Retrieved from http://www.geomorphology2009.com/cd-abstracts/search.html
Gault-Ringold, M., Stirling, C., Frew, R., & Hunter, K. (2009). Cadmium isotopic composition in oyster and seawater surrounding the South Island of New Zealand. In S. O'Shea, M. J. Costello & K. O'Connell (Eds.), Proceedings of the Joint New Zealand Marine Sciences and Meteorological Societies Conference. (pp. 54). Retrieved from http://nzmss.rsnz.org
Smith, I. J., Langhorne, P. J., Frew, R. D., & Haskell, T. G. (2009). The use of oxygen isotopes to determine sea ice growth rates. Proceedings of the New Zealand Snow and Ice Research Group (SIRG) Annual Workshop. (pp. 28). Retrieved from http://www.sirg.org.nz/
2008
Journal - Research Article
Croot, P. L., Bluhm, K., Schlosser, C., Streu, P., Breitbarth, E., Frew, R., & van Ardelan, M. (2008). Regeneration of Fe(II) during EIFeX and SOFeX. Geophysical Research Letters, 35(19), L19606. doi: 10.1029/2008GL035063
Benbow, T. J., Frew, R. D., & Hayman, A. R. (2008). Validation of a rapid and simple method for the preparation of aqueous organic compounds prior to compound specific isotope analysis. Organic Geochemistry, 39(12), 1690-1702. doi: 10.1016/j.orggeochem.2008.08.008
Wing, S. R., McLeod, R. J., Clark, K. L., & Frew, R. D. (2008). Plasticity in the diet of two echinoderm species across an ecotone: Microbial recycling of forest litter and bottom-up forcing of population structure. Marine Ecology Progress Series, 360, 115-123. doi: 10.3354/meps07434
Journal - Research Other
Ingraham, N. L., Mark, A. F., & Frew, R. D. (2008). Fog deposition by snow tussock grassland on the Otago uplands: Response to a recent review of the evidence. Journal of Hydrology (New Zealand), 47(2), 107-122.
Conference Contribution - Published proceedings: Abstract
Gault-Ringold, M., Stirling, C., Frew, R., & Hunter, K. (2008). Cadmium isotopic fractionation and nutrient cycling in the Southern Ocean. Geological Society of New Zealand Miscellaneous Publication. 124A, (pp. 182). Wellington, New Zealand: GSNZ. [Abstract]
Conference Contribution - Poster Presentation (not in published proceedings)
Gault-Ringold, M., Stirling, C., Hunter, K., & Frew, R. (2008, November-December). Cadmium isotope fractionation in the Southern Ocean and oyters surrounding the South Island of New Zealand. Poster session presented at the New Zealand Institute of Chemistry, New Zealand Society for Biochemistry and Molecular Biology and the New Zealand Society of Plant Biologists Combined Conference, Dunedin, New Zealand.
Muhammad, S. A., Frew, R. D., & Hayman, A. R. (2008, November-December). Forensic fingerprinting for oil spill characterisation and source identification. Poster session presented at the New Zealand Institute of Chemistry, New Zealand Society for Biochemistry and Molecular Biology and the New Zealand Society of Plant Biologists Combined Conference, Dunedin, New Zealand.
Adu, T., Frew, R. D., & Hunter, K. (2008, November-December). Influence of bioactive traces metals on Cd/PO43- ratio in Subtropical Front Southeast of New Zealand. Poster session presented at the New Zealand Institute of Chemistry, New Zealand Society for Biochemistry and Molecular Biology and the New Zealand Society of Plant Biologists Combined Conference, Dunedin, New Zealand.
McComb, K., Frew, R., & Hunter, K. (2008, November-December). The authentication of New Zealand dairy produce. Poster session presented at the New Zealand Institute of Chemistry, New Zealand Society for Biochemistry and Molecular Biology and the New Zealand Society of Plant Biologists Combined Conference, Dunedin, New Zealand.
Conference Contribution - Verbal presentation and other Conference outputs
Strzepek, R. F., Hunter, K., Frew, R., & Boyd, P. (2008, November-December). Adaptations of Southern Ocean phytoplankton to iron and light limitation. Verbal presentation at the New Zealand Institute of Chemistry, New Zealand Society for Biochemistry and Molecular Biology and the New Zealand Society of Plant Biologists Combined Conference, Dunedin, New Zealand.
Hamidian, A. H., Hunter, K. A., Frew, R. D., Peake, B. M., Currie, K. I., & Ibisanmi, E. B. (2008, November-December). Cadmium in the waters associated with the subtropical front east of New Zealand. Verbal presentation at the New Zealand Institute of Chemistry, New Zealand Society for Biochemistry and Molecular Biology and the New Zealand Society of Plant Biologists Combined Conference, Dunedin, New Zealand.
2007
Chapter in Book - Research
North, J. C., & Frew, R. D. (2007). Isotopic characterisation of leachate from seven New Zealand landfills. In E. C. Lehmann (Ed.), Landfill research focus. (pp. 199-261). New York: Nova Science.
Journal - Research Article
Harvey, C. R., Frew, R., Massicotte, D., Péronnet, F., & Rehrer, N. J. (2007). Muscle glycogen oxidation during prolonged exercise measured with oral [13C]glucose: Comparison with changes in muscle glycogen content. Journal of Applied Physiology, 102, 1773-1779. doi: 10.1152/japplphysiol.00690.2006
Simon, K. S., Niyogi, D. K., Frew, R. D., & Townsend, C. R. (2007). Nitrogen dynamics in grassland streams along a gradient of agricultural development. Limnology & Oceanography, 52(3), 1246-1257.
Thomas, D. B., Fordyce, R. E., Frew, R. D., & Gordon, K. C. (2007). A rapid, non-destructive method of detecting diagenetic alteration in fossil bone using Raman spectroscopy. Journal of Raman Spectroscopy, 38, 1533-1537.
Croot, P. L., Frew, R. D., Sander, S., Hunter, K. A., Ellwood, M. J., Pickmere, S. E., … Law, C. S., … Boyd, P. W. (2007). Physical mixing effects on iron biogeochemical cycling: FeCycle experiment. Journal of Geophysical Research, 112(C06015). doi: 10.1029/2006JC003748
Cornelisen, C. D., Wing, S. R., Clark, K. L., Bowman, M. H., Frew, R. D., & Hurd, C. L. (2007). Patterns in the δ13C and δ15N signature of Ulva pertusa: Interaction between physical gradients and nutrient source pools. Limnology & Oceanography, 52(2), 820-832.
Hepburn, C. D., Holborow, J. D., Wing, S. R., Frew, R. D., & Hurd, C. L. (2007). Exposure to waves enhances the growth rate and nitrogen status of the giant kelp Macrocystis pyrifera. Marine Ecology Progress Series, 339, 99-108. doi: 10.3354/meps339099
Conference Contribution - Published proceedings: Full paper
Mager, S., Fitzsimons, S., Frew, R., & Samyn, D. (2007). Stable isotope composition of the basal ice from Taylor Glacier, southern Victoria Land, Antarctica. In A. Cooper & C. Raymond (Eds.), Proceedings of the 10th International Symposium on Antarctic Earth Sciences (ISAES): Antarctica: A Keystone in a Changing World. (109). U.S Geological Survey. doi: 10.3133/of2007-1047
Conference Contribution - Poster Presentation (not in published proceedings)
Hareb, M. A., Hayman, A. R., & Frew, R. D. (2007, November). Isotopic analysis of C4 metabolites. Poster session presented at the 3rd Forensic Isotope Ratio Mass Spectrometry (FIRMS) Conference, Dunedin, New Zealand.
Benbow, T., Frew, R., & Hayman, A. (2007, April). Compound specific carbon and hydrogen isotope fractionation during solid phase extraction. Poster session presented at the European Geosciences Union General Assembly, Vienna, Austria.
2006
Journal - Research Article
Leonard, G. H., Purdie, C. R., Langhorne, P. J., Haskell, T. G., Williams, M. J. M., & Frew, R. D. (2006). Observations of platelet ice growth and oceanographic conditions during the winter of 2003 in McMurdo Sound, Antarctica. Journal of Geophysical Research, 111, C04012. doi: 10.1029/2005JC002952
Cox, L., MacKenzie, D. J., Craw, D., Norris, R. J., & Frew, R. (2006). Structure and geochemistry of the Rise & Shine Shear Zone mesothermal gold system, Otago Schist, New Zealand. New Zealand Journal of Geology & Geophysics, 49(4), 429-442. doi: 10.1080/00288306.2006.9515179
Frew, R. D., Hutchins, D. A., Nodder, S., Sanudo-Wilhelmy, S., Tovar-Sanchez, A., Leblanc, K., … Boyd, P. W. (2006). Particulate iron dynamics during FeCycle in subantarctic waters southeast of New Zealand. Global Biogeochemical Cycles, 20. Retrieved from http://www.agu.org/journals/gb/gb0601/2005GB002558/2005GB002558.pdf
Hepburn, C. D., Hurd, C. L., & Frew, R. D. (2006). Colony structure and seasonal differences in light and nitrogen modify the impact of sessile epifauna on the giant kelp Macrocystis pyrifera (L.) C Agardh. Hydrobiologia, 560, 373-384.
Tian, F., Frew, R., Sander, S., Hunter, K., & Ellwood, M. (2006). Organic Fe(III) speciation in surface transects across a frontal zone: The Chatham Rise, New Zealand. Marine & Freshwater Research, 57, 533-544.
Leduc, D., Probert, P. K., Frew, R. D., & Hurd, C. L. (2006). Macroinvertebrate diet in intertidal seagrass and sandflat communities: A study using C, N, and S stable isotopes. New Zealand Journal of Marine & Freshwater Research, 40(4), 615-629. doi: 10.1080/00288330.2006.9517450
North, J. C., Frew, R. D., & Van Hale, R. (2006). Can stable isotopes be used to monitor landfill leachate impact on surface waters? Journal of Geochemical Exploration, 88, 49-53.
Conference Contribution - Published proceedings: Abstract
Hareb, M. A., Hayman, A. R., & Frew, R. D. (2006). Isotopic analysis of C4 metabolites. In M. Lein (Ed.), Proceedings of the New Zealand Institute of Chemistry (NZIC) Conference: Back to the Basics: From Small Molecules to Materials and Surfaces (Vol. II: Posters). (pp. 156). Christchurch, New Zealand: New Zealand Institute of Chemistry. [Abstract]
2005
Journal - Research Article
Boyd, P. W., Law, C. S., Hutchins, D. A., Abraham, E. R., Croot, P. L., Ellwood, M., Frew, R. D., … Hunter, K. A., … Sander, S., … Strzepek, R., … Wilhelm, S. W. (2005). FeCycle: Attempting an iron biogeochemical budget from a mesoscale SF6 tracer experiment in unperturbed low iron waters. Global Biogeochemical Cycles, 19, GB4S20. doi: 10.1029/2005GB002494
Van Hamont, D., Harvey, C. R., Massicotte, D., Frew, R., Peronnet, F., & Rehrer, N. J. (2005). Reduction in muscle glycogen and protein utilization with glucose feeding during excercise. International Journal of Sport Nutrition & Exercise Metabolism, 15, 350-365.
Conference Contribution - Published proceedings: Abstract
Smith, I. J., Langhorne, P. J., Haskell, T. G., Frew, R. D., & Vennell, M. R. (2005). Platelet ice formation in McMurdo Sound, Antarctica. Proceedings of the International Symposium on Sea Ice. Dunedin, New Zealand. [Abstract]
2004
Journal - Research Article
Tallis, H. M., Wing, S. R., & Frew, R. D. (2004). Historical evidence for habitat conversion and local population decline in a New Zealand fjord. Ecological Applications, 14(2), 546-554.
Boyd, P. W., McTainsh, G., Sherlock, V., Richardson, K., Nichol, S., Frew, R., & Ellwood, M. (2004). Episodic enhancement of phytoplankton stocks in New Zealand subantarctic waters: Contribution of atmospheric and oceanic iron supply. Global Biogeochemical Cycles, 18, GB1029. doi: 10.1029/2002GB002020
North, J. C., Frew, R. D., & Peake, B. M. (2004). The use of carbon and nitrogen isotope ratios to identify landfill leachate contamination: Green Island Landfill, Dunedin, New Zealand. Environment International, 30, 631-637.
Simon, K. S., Townsend, C. R., Biggs, B. J. F., Bowden, W. B., & Frew, R. D. (2004). Habitat-specific nitrogen dynamics in New Zealand streams containing native or invasive fish. Ecosystems, 7(8), 777-792.
Campbell, J. R., Craw, D., Frew, R., Horton, T., & Chamberlain, C. P. (2004). Geochemical signature of orogenic hydrothermal activity in an active tectonic intersection zone, Alpine Fault, New Zealand. Mineralium Deposita, 39, 437-451.
Barker, S. L. L., Kim, J. P., Craw, D., Frew, R. D., & Hunter, K. A. (2004). Processes affecting the chemical composition of Blue Lake, an alluvial gold-mine pit lake in New Zealand. Marine & Freshwater Research, 55(2), 201-211.
Conference Contribution - Poster Presentation (not in published proceedings)
Hepburn, C., Holborow, J., Hurd, C. L., Wing, S. R., & Frew, R. (2004, February). Seasonal mass-transport limited growth of the giant kelp macrocystis pyrifera. Poster session presented at the American Society of Limnology and Oceanography and the Oceanography Society Ocean Research Conference, Honolulu, Hawaii.
Conference Contribution - Verbal presentation and other Conference outputs
Strzepek, R. F., Maldonado, M. T., Boyd, P. W., & Frew, R. (2004, January). Uptake of iron from organic complexes by plankton in the Southern Ocean. Verbal presentation at the Proceedings of the American Society of Limnology and Oceanography and The Oceanography Society Ocean Research 2004 Conference, Honolulu, Hawaii.
2003
Conference Contribution - Published proceedings: Abstract
Thompson, J., Lowe, B., Townsend, C. R., Craw, D., Frew, R. D., & Biggs, B. J. F. (2003). Importance of geological nitrogen subsidies to New Zealand streams. Proceedings of the Joint Australian Society for Limnology and The New Zealand Limnological Society Congress 2003. (pp. 124). Victoria: ASL. [Abstract]
2002
Conference Contribution - Published proceedings: Abstract
Hepburn, C. D., Holborow, J. D. L., Hurd, C. L., Wing, S. R., & Frew, R. D. (2002). Growth and Erosion rates of Macrocystis pyrifera in differing hydrodynamic environments in Paterson Inlet, Stewart Island, New Zealand. Proceeding of the Australasian Society for Phycology and Aquatic Botany. [Abstract]
Macrellis, H. M., Wing, S. R., & Frew, R. D. (2002). Linking watershed-scale alteration of hydrology to estuarine habitat conversion and local biodiversity decline. Proceedings of the ASLO Summer Meeting, Interdisciplinary Linkages in Aquatic Sciences and Beyond. Victoria, British Columbia, Canada. [Abstract]
Conference Contribution - Verbal presentation and other Conference outputs
Hepburn, C. D., Holborow, J., Hurd, C. L., Wing, S., & Frew, R. (2002). Nitrogen status, growth and erosion rates of Macrocystis pyrifera in differing hydrodynamic environments in Paterson Inlet, Stewart Island. Verbal presentation at the New Zealand Marine Aciences Society: Review 44, New Zealand.
Frew, R. D. (2002). A marine chemist's view of the world of aquatic tetrapods' [Plenary lecture]. Verbal presentation at the Conference on Secondary Adaptations to Life in Water
Simon, K. S., Townsend, C. R., Biggs, B. J. F., Bowden, W. B., & Frew, R. D. (2002). Habitat-specific nitrogen dynamics in streams containing native or invasive fish. Verbal presentation at the New Zealand Limnological Society Conference, Greymouth, New Zealand.
Frew, R. D. (2002). Nutrient and trace-metal dynamics at the sub-tropical convergence east of New Zealand [Invited lecture]. Verbal presentation at the New Zealand Institute of Water and Atmospheric Research Workshop on Ocean-ecosystems, Wellington, New Zealand.
2001
Journal - Research Article
Thompson, R. M., Townsend, C. R., Craw, D., & Frew, R. D. (2001). (Further) links from rocks to plants. Trends in Ecology & Evolution, 16, 543-544.
Frew, R. D., Bowie, A. R., Croot, P. L., & Pickmere, S. (2001). Macronutrient and trace-metal geochemistry of an in situ iron-induced Southern Ocean bloom. Deep Sea Research Part II, 48, 2467-3482.
Maldonado, M. T., Boyd, P. W., LaRoche, J., Strzepek, R., Waite, A., Bowie, A. R., … Frew, R. D., & Price, N. M. (2001). Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment. Limnology & Oceanography, 46(7), 1802-1808.
Bowie, A. R., Maldonado, M., Frew, R. D., Croot, P. L., Achterberg, E. P., Mantoura, R. F. C., … Law, C. S., & Boyd, P. W. (2001). The fate of added iron during a mesoscale fertilisation in the polar Southern Ocean. Deep Sea Research Part II, 48, 2703-2744.
Croot, P. L., Bowie, A. R., Frew, R. D., Maldonado, M., Hall, J. A., Safi, K. A., … Boyd, P. W., & Law, C. S. (2001). Retention of dissolved iron and FeII in an iron induced Southern Ocean phytoplankton bloom. Geophysical Research Letters, 28, 3425-3428.
Smith, I. J., Langhorne, P. J., Haskell, T. G., Trodahl, H. J., Frew, R. D., & Vennell, M. R. (2001). Platelet ice and the land-fast sea ice of McMurdo Sound, Antarctica. Annals of Glaciology, 33, 21-27.
Conference Contribution - Verbal presentation and other Conference outputs
Hepburn, C., Hurd, C. L., & Frew, R. (2001). The influence of the encrusting bryozoan Membranipora membranacea on the growth and nutrient physiology of Macrocystis pyrifera. Verbal presentation at the 7th International Phycological Congress, Thessaloniki, Greece.
Frew, R. D. (2001). NO a tracer of ocean-scale nitrification/denitrification processes [Invited speaker]. Verbal presentation at the Ocean-Ecosystems Workshop, Wellington.
2000
Journal - Research Article
Frew, R. D., & et al (2000). Mesoscale iron fertilisation elevates phytoplankton stocks in the polar Southern Ocean. Nature, 407(6805), 695-702.
Frew, R. D., Dennis, P., Heywood, K. J., Meredith, M. P., & Boswell, S. (2000). The oxygen isotope composition of water masses in the northern North Atlantic. Deep Sea Research Part I, 47, 2265-2286.
1999
Journal - Research Article
Meredith, M. P., Heywood, K. J., Frew, R. D., & Dennis, P. (1999). The distribution of δ18,O in the water masses between the southern Indian Ocean and Antartica. Journal of Marine Research, 57(3), 449-470.
Boyd, P., LaRoche, J., Gall, M., Frew, R. D., & McKay, R. (1999). The role of iron, light and silicate in controling algal biomass in subantartic waters SE of New Zealand. Journal of Geophysical Research, 104(C6), 13391-13404.
Meredith, M. P., Grose, K., McDonagh, E. L., Heywood, K. J., Frew, R. D., & Dennis, P. F. (1999). The distribution of oxygen isotopes in the water massess of Drake Passage and the South Atlantic. Journal of Geophysical Research, 104(C9), 20949-20962.
Conference Contribution - Published proceedings: Full paper
Frew, R. D., Hunter, K. A., & Beyer, R. (1999). Cadmium in sediments and molluscs in Foveaux Strait, New Zealand. In J. B. Macaskill (Ed.), Proceedings of the Trace Element Group of New Zealand Joint Conference, November 1996. (pp. 104-114). Hamilton: Trace Elements Group of New Zealand. [Full Paper]
Conference Contribution - Published proceedings: Abstract
Croot, P. L., Bowie, A. R., & Frew, R. D. (1999). Iron speciation during SOIREE (Southern Ocean Iron RElease Experiment). EOS Transactions of the American Geophysical Union. 80(49), (pp. 31). [Abstract]
Frew, R. D. (1999). The trace metal geochemistry of an iron induced phyoplankton bloom. EOS Transactions of the American Geophysical Union. 80(49), (pp. 31). [Abstract]
Bowie, A. R., Achterberg, E. P., Worsfold, P. J., Frew, R. D., Croot, P. L., & Mantoura, R. F. (1999). The surface and vertical distribution of iron during the Southern Ocean Iron RElease Experiment (SOIREE). EOS Transactions of the American Geophysical Union. 80(49), (pp. 30). [Abstract]
1998
Chapter in Book - Research
Heywood, K. J., Locarnini, R. A., Frew, R. D., King, B. A., & Dennis, P. (1998). Transport and water masses of the Antarctic slope front system in the eastern Weddell sea. In S. Jacobs & R. Weiss (Eds.), Ocean, Ice and Atmosphere: Interactions at the Antartic Continential Margin. (pp. 203-214). AGU Antarctic Research Series.
1997
Chapter in Book - Research
Dennis, P. J., Heywood, K. J., & Frew, R. D. (1997). Oxygen Isotope Studies. In R. T. Pollard & D. Smythe-Wright (Eds.), Understanding Ocean Circulation. (pp. 31-32). UK: WOCE.
Journal - Research Article
Frew, R. D., Hunter, K. A., & Beyer, R. (1997). Cadmium in sediments and molluscs in Foveaux Strait, New Zealand. Proceedings of the Trace Element Group of New Zealand.
Conference Contribution - Published proceedings: Abstract
Frew, R. D., Heywood, K., & Dennis, P. (1997). The δ18 Composition of Antartic Coastal Current Waters. Proceedings of the Sixth Australia-New Zealand environmental isotope conference. [Abstract]
1996
Journal - Research Article
Locarnini, R. A., Heywood, K. J., Frew, R. D., Watson, A. J., & van Scoy, K. A. (1996). Hydrography and ocean circulation in the south Atlantic and southern ocean. Eos, 76(3), 87.
Conference Contribution - Published proceedings: Abstract
Frew, R. D., & Hunter, K. A. (1996). Cadmium in oysters and sediments from Foveaux Strait, New Zealand. In J. B. Macaskill (Ed.), ICP/NZ Trace Elements Group, Joint Conference. (pp. 104-114). Hamilton: Trace Elements Group of New Zealand. [Abstract]