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The role of marine microbes in the global carbon cycle (DECRA - Jean-Baptiste Raina)

Funding: 2016: $125,300
2017: $125,500
2018: $125,500

Project Member(s): Raina, J.

Funding or Partner Organisation: Australian Research Council (ARC DECRA Scheme)

Start year: 2016

Summary: Marine microbes are the unseen engines that drive the oceanic carbon cycle, which ultimately feeds the base of the marine food web and regulates global climate. However, technical limitations have restricted our ability to identify the ‘key-stone’ microbes most responsible for driving ocean carbon cycling, and measure the chemical consequences of their activities. This project will combine new approaches in microfluidics, chemistry and oceanography to quantify carbon uptake by individual microbes in their natural environment. This approach will deliver a transformative new understanding of the microbe-mediated chemical cycling processes that control the productivity of marine fisheries and the climate of our planet.


Curson, A.R.J., Williams, B.T., Pinchbeck, B.J., Sims, L.P., Martínez, A.B., Rivera, P.P.L., Kumaresan, D., Mercadé, E., Spurgin, L.G., Carrión, O., Moxon, S., Cattolico, R.A., Kuzhiumparambil, U., Guagliardo, P., Clode, P.L., Raina, J.-.B. & Todd, J.D. 2018, 'DSYB catalyses the key step of dimethylsulfoniopropionate biosynthesis in many phytoplankton.', Nature microbiology, vol. 3, no. 4, pp. 430-439.
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Lawson, C.A., Raina, J.-.B., Kahlke, T., Seymour, J.R. & Suggett, D.J. 2018, 'Defining the core microbiome of the symbiotic dinoflagellate, Symbiodinium.', Environmental microbiology reports, vol. 10, no. 1, pp. 7-11.
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Gardner, S.G., Raina, J.-.B., Nitschke, M.R., Nielsen, D.A., Stat, M., Motti, C.A., Ralph, P.J. & Petrou, K. 2017, 'A multi-trait systems approach reveals a response cascade to bleaching in corals.', BMC biology, vol. 15, no. 1, p. 117.
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Lambert, B.S., Raina, J.-.B., Fernandez, V.I., Rinke, C., Siboni, N., Rubino, F., Hugenholtz, P., Tyson, G.W., Seymour, J.R. & Stocker, R. 2017, 'A microfluidics-based in situ chemotaxis assay to study the behaviour of aquatic microbial communities.', Nature microbiology, vol. 2, pp. 1344-1349.
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Raina, J.-.B., Clode, P.L., Cheong, S., Bougoure, J., Kilburn, M.R., Reeder, A., Forêt, S., Stat, M., Beltran, V., Thomas-Hall, P., Tapiolas, D., Motti, C.M., Gong, B., Pernice, M., Marjo, C.E., Seymour, J.R., Willis, B.L. & Bourne, D.G. 2017, 'Subcellular tracking reveals the location of dimethylsulfoniopropionate in microalgae and visualises its uptake by marine bacteria.', eLife, vol. 6, pp. 1-17.
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Seymour, J.R., Amin, S.A., Raina, J. & Stocker, R. 2017, 'Zooming in on the phycosphere: the ecological interface for phytoplankton–bacteria relationships', Nature Microbiology, vol. 2, pp. 1-12.
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Keywords: carbon cycling, marine microbes,

FOR Codes: Microbial Ecology, Biological Oceanography, Chemical Oceanography, Expanding Knowledge in the Biological Sciences, Physical and Chemical Conditions of Water in Marine Environments, Effects of Climate Change and Variability on Australia (excl. Social Impacts)