( See also recent citations of our work on ResearchGate)

 

Cassar, N., Berthelot, H., Weiyi, T. Theoretical and empirical analysis of the thermodynamics and kinetics of the isotopic equilibration of nitrogen gas (N2) in water: Implications for biological N2 fixation experiments. Submitted.

Stephens et al. An upper mesopelagic zone carbon budget for the subarctic North Pacific. In Review.

Lemaitre et al. Biological contribution to the nickel cycle in the Southern Ocean: insights from isotopes and metagenomics. Submitted.

Xu, C., Cassar, N., Qiu, G., Wang, H., Huang, B. The contribution of the mixed layer pump to carbon export in low-latitude regions. Submitted.

Gray et al. The Impact of Gulf Stream Frontal Eddies on Ecology and Biogeochemistry near Cape Hatteras. Submitted.

Gu, S., Lin, Y., Berthelot, H., Tang, W., Robidart, J., Eren A. M., Ducklow, H. W., Cassar, N. 2024. Evidence of limited N2 fixation in the Southern Ocean. Accepted in Communications Earth & Environment.

Gittings, J. A., Dall’Olmo, Tang, W., G., Llort, J., Jebri, F., Livanou, E., Nencioli, F.,  Darmaraki, S., Theodorou, I., Brewin, R. J., Srokoz, M., Cassar, N., Raitsos, D. 2024. An exceptional phytoplankton bloom in the Southeast Magascar Sea driven by African dust deposition. PNAS Nexus, https://doi.org/10.1093/pnasnexus/pgae386.

Richter et al. 2024. The Earth and Ecological Sciences Are Model Sciences of the Anthropocene. Perspectives of Earth and Space Scientists, https://doi.org/10.1029/2024CN000237.

Chowdhury, S., Berthelot, H., Baudet, C., Santana-González, D., Furbo Reeder, C., L’Helguen, S., Maguer, J.F., Löscher, C. R., Singh, A., Blain, S., Cassar, N., Bonnet, S., Planquette, H., Benavides, M.  2024. Fronts divide diazotroph communities in the Southern Indian Ocean. FEMS Microbiology Ecology, https://doi.org/10.1093/femsec/fiae095.

Meyer, M. G., Brzezinski, M. A., Cohn, M. R., Kramer, S. J., Paul, N., Sharpe, G., Niebergall, A. K., Gifford, S., Cassar, N., Marchetti, A. 2024. Size-fractionated primary production dynamics during the decline phase of the North Atlantic spring bloom. Global Biogeochemical Cycles, https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GB008019.

Li, Z., Lin, Y., Cassar, N. 2024. The influence of phytoplankton size fractions on the carbon export ratio in the surface ocean. Ecological Modelling, https://doi.org/10.1016/j.ecolmodel.2024.110798.

Cohn, M. R., Stephens, B., Meyer, M. G., Sharpe, G. C., Niebergall, A. K., Graff, J. R., Cassar, N., Marchetti, A., Carlson, C. A., Gifford, S. M. 2024. Microbial Respiration in Contrasting Ocean Provinces via High-Frequency Optical Assays. Frontiers in Marine Science, https://doi.org/10.3389/fmars.2024.1395799.

Gray, P. C. , Savelyev, I., Cassar, N. Levy, M. Boss, E., Lehahn, Y., Bourdin, G., Thompson, K. A., Windle, A., Gronniger, J., Floge, S., Hunt, D. E., Silsbe, G., Johnson, Z. I., Johnston, D. W. 2024. Evidence for kilometer-scale biophysical features at the Gulf Stream front. Journal of Geophysical Research – Oceans, https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023JC020526.

Shao et al. 2023. Version two of the global oceanic diazotroph database. Earth System Science Data, https://doi.org/10.5194/essd-15-3673-2023.

Niebergall, A., Traylor, S. Huang, Y., Feen, M., Meyer, M. G., McNair, H. M., Nicholson, D., Fassbender, A. J., Omand, M. M., Marchetti, A., Menden-Deuer, S., Tang, W., Gong, W., Tortell, P., Hamme, R., Cassar, N. 2023. Evaluation of new and net community production estimates by multiple ship-based and autonomous observations in the Northeast Pacific Ocean. Elementa: Science of the Anthropocene (2023) 11 (1): 00107.

Gu, Y., Katul, G. G., Cassar, N. 2023. Multiscale temporal variability of the global air-sea CO2 flux anomaly. JGR Biogeosciences, https://doi.org/10.1029/2022JG006934.

Lombard et al. 2023. Open science resources from the Tara Pacific expedition across coral reef and surface ocean ecosystem.  Scientific Data, https://doi.org/10.1038/s41597-022-01757-w.

 Huang, Y., Eveleth, R., Nicholson, D., Cassar, N. 2022. Can we estimate air-sea flux of biological O2 from total dissolved O2? Global Biogeochemical Cycles, http://doi.org/10.1029/2021GB007145.

Meyer, M. G., Gong, W., Kafrissen, S., Torano, O., Varela, D., Fassbender, A., Santoro, A., Cassar, N., Gifford, S., Niebergall, A., Sharpe, G., Marchetti, A. 2022. Phytoplankton size-class contributions to new and regenerated production during the EXPORTS Northeast Pacific Ocean field deployment. Elementa, https://doi.org/10.1525/elementa.2021.00068.

Huang, Y. Tagliabue, A., Cassar, N. 2022. Data-driven modeling of dissolved iron in the global ocean. Frontiers in Marine Science, https://doi.org/10.3389/fmars.2022.837183.

Landwehr, S. et al. 2021. Biogeochemistry and physics of the Southern Ocean ocean-atmosphere system explored with data science. Earth System Dynamics, 12, 1295–1369.

Cassar, N., Nicholson, D., Khatiwala, S., Cliff, E. 2021. Decomposing the oxygen signal in the ocean interior: Beyond decomposing organic matter. Geophysical Research Letters, https://doi.org/10.1029/2021GL092621.

Tang, W., Llort, J. Weis, J., Basart, S., Li, Z., Sathyendranath, S., Jackson, T., Perron, M. G., Sanz Rodriguez, E., Proemse, B., Bowie, A. R., Schallenberg, C., Strutton, P. G., Matear, R., Cassar, N. 2021. Widespread phytoplankton blooms triggered by 2019-2020 Australian wildfires. Nature, doi: 10.1038/s41586-021-03805-8.

Li, Z., Lozier, M. S., Cassar, N. 2021. Southern Ocean mixed layer dynamics and net community production on intra-seasonal, seasonal, interannual, and multi-year timescales. Journal of Geophysical Research – Oceans, https://doi.org/10.1029/2021JC017537.

Lin, Y., Moreno, C., Marchetti, A., Ducklow, H. Schofield, O., Delage, E., Meredith, M., Eveillard, D., Chaffron, S., Cassar, N. 2021. Plankton diversity and carbon flux declines with reduced sea ice extent along the Western Antarctic Peninsula. Nature Communications, https://doi.org/10.1038/s41467-021-25235-w.

Berthelot, H., Duhamel, S., L’Helguen, S., Maguer, J.-F., Cassar, N. 2021. Inorganic and organic carbon and nitrogen uptake strategies of picoplankton groups in the northwestern Atlantic Ocean.  Limnology and Oceanography, https://doi.org/10.1002/lno.11909.

Siegel et al. 2021. Overview of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) Northeast Pacific Field Deployment. Elementa, https://doi.org/10.1525/elementa.2020.00107.

Brown, M. S., Bowman, J. S., Lin, Y., Feehan, C. J., Moreno, C. M., Cassar, N, Marchetti, A. Schofield, O. M. 2021. Low Diversity of a Key Phytoplankton Group along the West Antarctic Peninsula. Limnology and Oceanography, https://doi.org/10.1002/lno.11765.

Gu, Y., Katul, G. G., Cassar, N. 2021. Mesoscale temporal wind variability biases global air-sea gas transfer velocity of CO2 and other slightly soluble gases. Remote Sensing, 13(7), 1328: https://doi.org/10.3390/rs13071328.

Wang, S., Tang, W., Delage, E., Gifford, S., Whitby, H., Gonzalez, A. G., Eveillard, D., Planquette, H., Cassar, N. 2021. Investigating the microbial ecology of coastal hotspots of marine nitrogen fixation in the western North Atlantic. Scientific Reports, https://doi.org/10.1038/s41598-021-84969-1.

Gu, Y., Katul, G. G., Cassar, N. 2021. The intensifying role of high wind speeds on air-sea carbon dioxide exchange. Geophysical Research Letters, https://doi.org/10.1029/2020GL090713.

Huang, Y., Nicholson, D., Huang, B. Cassar, N. 2021. Global estimates of marine gross primary production based on machine‐learning upscaling of field observations. Global Biogeochemical Cycles, https://doi.org/10.1029/2020GB006718.

Landwehr, S., Thurnherr, I., Cassar, N., Gysel-Beer, M., Schmale, J. 2020. Using global reanalysis data to quantify and correct airflow distortion bias in shipborne wind speed measurements. Atmospheric Measurement Techniques, 13, 3487–3506.

Tang, W., Garcia, E., Berthelot, H., Polyviou, D., Wang, S., Baylay, A., Whitby, H., Planquette, H., Mowlem, M., Robidart, J., Cassar, N. 2020. New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods. The ISME Journal, https://doi.org/10.1038/s41396-019-0489-6.

Kranz, S. A., Wang, S., Kelly, T. B., Stukel, M. R., Goericke, R., Landry, M. R., Cassar, N. 2020. Lagrangian studies of marine production: a multi-method assessment of productivity relationships in the California Current Ecosystem upwelling region. JGR-Oceans, https://doi.org/10.1029/2019JC015984.

Wang, S., Kranz, S. A., Kelly, T.  B., Song, H., Stukel, M. R., Cassar, N. 2020. Lagrangian studies of net community production: assessing the effect of diel and multi-day non-steady state factors and vertical fluxes. JGR-Biogeosciences, https://doi.org/10.1029/2019JG005569.

Whitby, H., Planquette, H., Cassar, N., Bucciarelli, E., Osburn, C. L., Janssen, D. J., Cullen, J. T., González, A. G., Völker, C., Sarthou, G. 2020. A call for refining the role of humic-like substances in the oceanic iron cycle. Scientific Reports, https://doi.org/10.1038/s41598-020-62266-7.

Gorsky et al. 2019. Expanding Tara Oceans protocols for underway, ecosystematic sampling of the ocean-atmosphere interface during Tara Pacific expeditions. Frontiers in Marine Science, doi: 10.3389/fmars.2019.00750.

Tang, W. & Cassar, N. 2019. Data-driven modeling of the distribution of diazotrophs in the global ocean. Geophysical Research Letters, doi: 10.1029/2019GL084376.

Lorrain, A., Pethybridge, H., Cassar, N. et al. 2019. Trends in tuna carbon isotopes reflect global changes in pelagic phytoplankton communities. Global Change Biology, https://doi.org/10.1111/gcb.14858.

Planes, S. et al. 2019. The Tara Pacific expedition—A pan-ecosystemic approach of the “-omics” complexity of coral reef holobionts across the Pacific Ocean. PLOS Biology, https://doi.org/10.1371/journal.pbio.3000483.

Lampe, R. H., Wang, S., Cassar, N., Marchetti, A. 2019. Strategies among phytoplankton in response to alleviation of nutrient stress in a subtropical gyre. The ISME Journal, https://doi.org/10.1038/s41396-019-0489-6.

Tang, W., Li, Z., Cassar, N. 2019. Machine learning estimates of global marine nitrogen fixation. JGR-Biogeosciences, https://doi.org/10.1029/2018JG004828.

Tang, W., Wang, S., Fonseca-Batista, D., Dehairs, F., Gifford, S., Gonzalez, A. G., Planquette, H., Sarthou, G., Gallinari, M., Cassar, N. 2019. Revisiting the distribution of oceanic N2 fixation and estimating diazotrophic contribution to marine production. Nature Communications, https://doi.org/10.1038/s41467-019-08640-0.

Lin, Y., Gifford, S., Ducklow, H., Schofield, O., Cassar, N. 2019. Towards quantitative microbiome community profiling using internal standards. Applied and Environmental Microbiology,  doi: 10.1128/AEM.02634-18.

Li, Z. & Cassar, N. 2018. Theoretical considerations on factors confounding the interpretation of the oceanic carbon export ratio. Global Biogeochemical Cycles, https://doi.org/10.1029/2018GB006003.

Berthelot, H.,  Duhamel, S., L’Helguen, S., Maguer, J.-F., Wang, S., Cetinić, I., Cassar, N. 2018. NanoSIMS single cell analyses reveal the contrasting nitrogen sources for small phytoplankton. The ISME Journal, https://doi.org/10.1038/s41396-018-0285-8.

Nevison, C., Munro, D., Lovenduski, N., Cassar, N., Keeling, R., Krummel, P., Tjiputra, J. 2018. Net community production in the Southern Ocean: Insights from comparing atmospheric potential oxygen to satellite ocean color algorithms and ocean models. Geophysical Research Letters, doi: 10.1029/2018GL079575.

Simonin, M., Colman, B. P., Tang, W., Judy, J. D., Anderson, S. M., Bergemann, C. M., Rocca, J. D., Unrine, J. M., Cassar, N., Bernhardt, E. S. 2018. Plant and microbial responses to repeated Cu(OH)2 nanopesticide exposures under different fertilization levels in an agro-system. Frontiers in Microbiology, doi: 10.3389/fmicb.2018.01769.

Wang, S., Lin, Y., Gifford, S., Eveleth, R., Cassar, N. 2018. Linking patterns of net community production and marine microbial community structure in the western North Atlantic. The ISME Journal, https://doi.org/10.1038/s41396-018-0163-4.

Ducklow, H. W., Stukel, M., Eveleth, R., Jickells, T.,  Schofield, O., Doney, S., Baker, A., Brindle, J., Chance, R., Cassar, N. 2018. Spring-summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012-2014. Phil Trans Royal Soc , DOI 10.1098/rsta.2017.0177.

Cassar, N., Tang, W., Gabathuler, H., Huang, K. 2018. Method for high frequency underway N2 fixation measurements: Flow-through incubation Acetylene Reduction Assays by Cavity ring down laser Absorption Spectroscopy (FARACAS). Analytical Chemistry, 90 : 2839-2851.

Moreno, C. M., Lin, Y., Davies, S. W., Monbureau, E., Cassar, N., Marchetti, A. 2018. Examination of gene repertoires and physiological responses to iron and light limitation in Southern Ocean diatoms.  Polar Biology, https://doi.org/10.1007/s00300-017-2228-7.

Lin, Y., Cassar, N., Marchetti, A., Ducklow, H., Li, Z. 2017. Specific eukaryotic plankton are good predictors of net community production in the Southern Ocean. Scientific Reports, doi:10.1038/s41598-017-14109-1.

Li, Z. & Cassar, N. 2017. A mechanistic model of an upper bound on oceanic carbon export as a function of mixed layer depth and temperature. Biogeosciences, 14, 5015-5027.

Eveleth, R., Cassar, N., Sherrell, R. M., Meredith, M. P., Ducklow, H., Lin, Y., Li, Z. 2017. Ice melt influence on summertime net community production along the Western Antarctic Peninsula. Deep Sea Research II: 139: 89-102.

Eveleth, R., Cassar, N., Doney, S.C., Munro, D.R., Sweeney C. 2017. Biological and physical controls on O2/Ar, Ar and pCO2 variability at the Western Antarctic  Peninsula and Drake Passage. Deep Sea Research II, 139: 77-88.

Erickson, Z. K., Thompson, A. F., Cassar, N., Sprintall, J. 2016. Advective generation of Deep-Chlorophyll Maxima (DCMs) in Southern Drake Passage. Geophysical Research Letters,10.1002/2016GL070565.

Li, Z., Cassar, N., Huang, K.,  Ducklow, H., Schofield, O. 2016. Interannual variability in net community production at the Western Antarctic Peninsula region (1997-2014). Journal of Geophysical Research, doi: 10.1002/2015JC011378.

Li, Z. & Cassar, N. 2016. Satellite estimates of net community production based on O2/Ar observations and comparison to previous estimates. Global Biogeochemical Cycles, doi: 10.1002/2015GB005314.

Bender, M. L., Tilbrook, B.,  Cassar, N., Jonsson, B., Poisson, A., Trull, T.  W. 2016. Ocean productivity south of Australia during spring and summer. Deep Sea Research Part I, 112: 68-78.

Huang, K., Cassar, N., Jonsson, B., Cai, W.-J., Bender, M. L. 2015. An ultra-high precision, high frequency dissolved inorganic carbon analyzer based on dual isotope dilution and cavity ring-down spectroscopy. Environmental Science & Technology, 49 (14): 8602–8610.

Marchetti, A., Catlett, D., Hopkinson, B. M., Ellis, K., Cassar, N. 2015. Marine eukaryotic proteorhodopsins and their potential role in coping with low iron availability. ISME, doi: 10.1038/ismej.2015.74.

Cassar, N., Wright, S. W., Thomson, P., Trull, T. W., Westwood, K. J., de Salas, M., Davidson, A., Pearce, I., Davies, D. M., Matear, R. J. 2015. The relation of net community production to phytoplankton community composition in the Southern Ocean. Global Biogeochemical Cycles, doi: 10.1002/2014GB004936.

Shadwick, E. H., Tilbrook, B., Cassar, N., Trull, T. W., Rintoul, S. R.  2015. Summertime physical and biological controls on O2 and CO2 in the Australian Sector of the Southern Ocean. Journal of Marine Systems, 147: 21-28.

Cassar, N., Nevison, C. D., Manizza, M. 2014. Correcting oceanic O2/Ar-net community production estimates for vertical mixing using N2O observations. Geophysical Research Letters,DOI: 10.1002/2014GL062040.

Ulfsbo, A. Cassar, N., Korhonen, M., van Heuven, S., Hoppema, M., Kattner, G., Anderson, L. G. 2014.Late summer net community production estimates in the Central Arctic Ocean based on multiple approaches. Global Biogeochemical Cycles, doi: 10.1002/2014GB004833.

Eveleth, R. Timmermans, M.-L., Cassar, N. 2014. Physical and biological controls on oxygen saturation in the upper Arctic Ocean. Journal of Geophysical Research, DOI: 10.1002/2014JC009816.

Rödenbeck, C., Bakker, D. C. E., Metzl, N., Olsen, A., Sabine, C., Cassar, N., Reum, F., Keeling, R. F., Heimann, M. 2014. Interannual sea-air CO2 flux variability from an observation-driven ocean mixed-layer scheme. Biogeosciences, doi:10.5194/bg-11-4599-2014.

Rutgers v.d. Loeff, M., Cassar, N., Nicolaus, M., Rabe, B., Stimac, I.  2014. The influence of sea-ice cover on air-sea gas exchange estimated with radon-222 profiles. Journal of Geophysical Research, 119: 2735-2751.

Chang, C.-H., Johnson, N. C., Cassar, N. 2014. Neural network-based estimates of Southern Ocean net community production from in-situ O2/Ar and satellite observations: A methodological study. Biogeosciences, 11: 3279-3297.

Huang, K., Cassar, N., Wanninkhof, R., Bender, M. L. 2013. An isotope dilution method for high frequency measurements of dissolved inorganic carbon in the surface ocean. Limnology and Oceanography: Methods 11: 572-583.

Martin, P., Rutgers v.d. Loeff, M., Cassar, N., Vandromme, P., d’Ovidio, F., Rengarajan, R., Soares, M., Gonzales, H. E., Ebersbach, F., Lampitt, R. S., Sanders, R., Barnett, B. A., Smetacek, V., Naqvi, S. W. A. 2013. Iron fertilization enhanced et community production but not downward particle flux during the Southern Ocean iron fertilization experiment LOHAFEX. Global Biogeochemical Cycles, Vol. 27: 1-11, doi: 10.1002/gbc.20077.

Li, Z., Li, L., Song, K., Cassar, N. 2013. Estimation of phytoplankton size fractions based on spectral features of remote sensing ocean color data. Journal of Geophysical Research, 118: 1-14.

Castro-Morales, K., Cassar, N., Shoosmith, D. R., Kaiser, J. 2013. Biological Production in the Bellingshausen Sea from oxygen-to-argon and oxygen triple isotopes. Biogeosciences, 10: 2273-2291.

Jean, M.-E., Cassar, N., Setzer, C., Bellenger, J.-P. 2012. Short-term N2 fixation kinetics in a moss-associated cyanobacteria.   Environmental Science & Technology, 46(16): 8667-8671.

Cassar, N., Bellenger, J.-P., Jackson, R. B., Karr, J., Barnett, B. A. 2012. N2 fixation in real-time by cavity ring-down laser absorption spectroscopy.  Oecologia: doi:10.1007/s00442-011-2105-y.

Bhattachan, A., D’Odorico, P., Baddock, M., Zobeck, T., Okin, G., Cassar, N. 2012. The Southern Kalahari: A potential new dust source in the southern hemisphere?  Environmental Research Letters:doi:10.1088/1748-9326/7/2/024001.

Huang, K., Ducklow, H., Vernet, M., Cassar, N., Bender, M. L. 2012. Export production and its regulating factors in the West Antarctic Peninsula region of the Southern Ocean.  Global Biogeochemical Cycles: Vol. 26, GB2005, doi:10.1029/2010GB004028. 

Nevison, C. D., Keeling, R. F., Kahru, M., Manizza, M., Mitchell, B. G., Cassar, N. 2012. Estimating net community production in the Southern Ocean based on atmospheric potential oxygen and satellite ocean color data.  Global Biogeochemical Cycles: Vol. 26, GB1020, doi:10.1029/2011GB004040.

Hamme, R. C., Cassar, N., Bender, M. L., Lance, V. P., Vaillancourt, R. D., Strutton, P. G., Moore, T. S., Ho, D. T., Hargreaves, B. R. 2012. Dissolved O2/Ar and other methods reveal rapid changes in productivity during a Lagrangian experiment in the Southern Ocean. Journal of Geophysical Research 117: doi:10.1029/2011JC007046. 

Bender, M. L., Kinter, S., Cassar, N., Wanninkhof, R. 2011. Evaluating gas exchange parameterizations using upper ocean radon distributions.  Geophysical Research Letters 116: C02010, doi:10.1029/2009JC005805.

Cassar, N., DiFiore, P., Barnett, B. A., Bender, M. L., Bowie, A. R., Tilbrook, B., Petrou, K., Westwood, K. J., Wright, S. W., Lefevre, D. 2011. The influence of iron and light availability on net community production in the subantarctic and polar frontal zones.  Biogeosciences 8: 227-237.

Stanley, R.H.R., Kirkpatrick, J.B., Cassar, N., Barnett, B.A., Bender, M. L. 2010. Net community production and gross primary production rates in the Western Equatorial Pacific. Global Biogeochemical Cycles. Vol. 24, GB4001, doi:10.1029/2009GB003651.

Marchetti, A. & Cassar, N. 2009. Iron-induced changes in diatom elemental stoichiometry and morphology: a brief review with potential paleoceanographic applications. Geobiology 7: 1-13.

Cassar, N., Barnett, B. A., Bender, M. L., Kaiser, J., Hamme, R. C., Tilbrook, B. 2009. Continuous high-frequency dissolved O2/Ar measurements by Equilibrator Inlet Mass Spectrometry (EIMS). Analytical Chemistry 81(5): 1855-1864.

Cassar, N., McKinley, G. A., Bender, M. L., Mika, R., Battle, M. 2008. An improved comparison of atmospheric Ar/N2 time-series and paired ocean-atmosphere models predictions.  J. Geophys. Res., 113, D21122, doi:10.1029/2008JD009817.

Nevison, C. D., Mahowald, N. M., Doney, S. C., Lima, I. D., Cassar, N. 2008. Impact of variable air-sea O2 and CO2 fluxes on atmospheric potential oxygen (APO) and land-ocean carbon sink partitioning. Biogeosciences 5: 875-889.

Cassar, N., Bender, M. L., Barnett, B. A., Fan, S., Moxim, W. J., Levy, H.II, Tilbrook, B. 2008. Response to Technical Comment by Boyd and Mackie. Science 319: 159b.

Cassar, N., Bender, M. L., Barnett, B. A., Fan, S., Moxim, W. J., Levy, H.II, Tilbrook, B. 2007. The Southern Ocean Biological Response to Aeolian Iron Deposition. Science 317:1067-1070.

Cassar, N. & Laws, E. A. 2007. The influence of β-carboxylation on photosynthetic carbon isotope fractionation in a marine diatom. Phycologia 46(3): 307-314.

Cassar, N., Laws, E. A, Popp, B. N. 2006. Carbon isotopic fractionation by the marine diatom Phaeodactylum tricornutum under nutrient– and light- limited growth conditions. Geochimica et Cosmochimica Acta 70 (21): 5323-5335.

Bender, M. L., Ho, D. T. Hendricks, M. B., Mika, R., Battle, M. O., Tans, P. P., Conway, T. J., Sturtevant, B., Cassar, N. 2005. Atmospheric O2/N2 changes, 1993-2002: implications for the partitioning of fossil fuel CO2 sequestration. Global Biogeochemical Cycles. Vol. 19, GB4017, doi:10.1029/2004GB002410.

Cassar, N., Laws, E. A., Bidigare, R. R., Popp, B. N. 2004. Bicarbonate uptake by Southern Ocean phytoplankton. Global Biogeochemical Cycles 18: 1-10.

Cassar, N. 2003. Carbon-Concentrating Mechanisms and b-Carboxylation: their potential contribution to Marine Photosynthetic Carbon Isotope Fractionation. Ph.D. Dissertation, School of Ocean and Earth Science and Technology, University of Hawaii. 222 pg.

Cassar, N., Laws, E. A., Popp, B. N., Bidigare, R. R. 2002. Sources of inorganic carbon for photosynthesis in a strain of Phaeodactylum tricornutum. Limnology and Oceanography 47: 1192-1197.

Laws, E. A., Popp, B. N., Cassar, N., and Tanimoto, J. 2002. 13C discrimination patterns in oceanic phytoplankton: The likely influence of CCMs and the implications for palaeoreconstructions. Functional Plant Biology 29: 1-11.

Berner, R.A., Petsch, S.T., Beerling, D.J., Popp, B.N., Lane, R.S., Laws, E.A., Westley, M.B., Cassar, N. Woodward, F.I., and Quick, W.P. 2000. Isotope fractionation and atmospheric oxygen: Implications forPhanerozoic O2 Evolution. Science 287: 1630-1633.

Vaugelas J. De, Meinesz A., Antolic B., Ballesteros E., Belsher T., Cassar N., Cecherelli G., Cinelli F.,Cottalorda J.M., Frada Orestano C., Grau A.M., Jaklin A., Morucci C., Relini M., Sandulli R., Span A., TripaldiG., Van Klaveren P., Zavodnik N. and Zuljevic A. 1999. Standardization  of map representation for the expansion of Caulerpa taxifolia in the Mediterranean sea. Oceanologica acta, 22 (1): 85-94.