Joana Barcelos e Ramos




Joana Barcelos e Ramos

Research scientist

University of the Azores
Center of Climate, Meteorology and Global Changes
Rua Capitão João d'Avila
9700-042 Angra do Heroísmo

00351 295 402214
joana.b.ramos at

Joana Barcelos e Ramos



Ocean acidification, phytoplankton physiology, marine biogeochemical cycles


Research interests

Effects of global change namely increasing carbon dioxide on phytoplankton, their role in biogeochemical elemental cycling and potential feedbacks to climate. Phytoplankton physiology, life-cycles and mortality (especially viral attack and program cell death).



Barcelos e Ramos, J., K. G. Schulz, C. Brownlee, S. Sett and E. B. Azevedo, 2014, Effects of increasing seawater carbon dioxide concentrations on chain formation of the diatom Asterionellopsis glacialis, PloS One, 9(3): e90749. doi:10.1371/journal.pone.0090749.

Eggers, S. J., A. M. Lewandowska, J. Barcelos e Ramos, S. Blanco-Ameijeiras, F. Gallo and B. Matthiessen, 2014, Community composition has greater impact on the functioning of marine phytoplankton communities, Global Change Biology. doi: 10.111/gcb.12421.

Mueller M., M. Lebrato, U. Riebesell, J. Barcelos e Ramos, K. G. Schulz, S. Blanco-Ameijeiras, S. Sett, A. Eisenhauer and H. M. Stoll, 2014, Influence of temperature and CO2 on the strontium and magnesium composition of coccolithophore calcite, Biogeosciences, 11: 1065-1075.

Barcelos e Ramos, J., M. G. Schulz, S. Febiri and U. Riebesell, 2012, Photoacclimation to abrupt changes in light intensity by Phaeodactylum tricornutum and Emiliania huxleyi: the role of calcification, Marine Ecology Progress Series, 452: 11-26.

Barcelos e Ramos, J., M. N. Mueller and U. Riebesell, 2010, Short-term response of the coccolithophore Emiliania huxleyi to abrupt changes in seawater carbon dioxide concentrations, Biogeosciences, 7: 177-186.

Czerny, J., J. Barcelos e Ramos and U. Riebesell, 2009, Influence of elevated CO2 concentrations on cell division and nitrogen fixation rates in the bloom forming cyanobacterium Nodularia spumigena, Biogeosciences Discuss. 6, 1865-1875.

Schulz, K. G., J. Barcelos e Ramos, R. E. Zeebe and U. Riebesell, 2009, CO2 perturbation experiments: similarities and differences between dissolved inorganic carbon and total alkalinity manipulations, Biogeosciences Discuss. 6, 2145-2153.

Engel, A., J. Barcelos e Ramos, R. Geider, D. A. Hutchins, C. Lee, B. Rost, R. Roettgers and F. Thingstad, 2009, Chapter 3: Measurements of CO2 sensitive processes / Section 3.2 Organic and export production In: Guide for best practices in ocean acidification research, Riebesell, U. And Fabry, V. J. And Gattuso, J.-P. (Eds.) ,

Barcelos e Ramos, J., H. Biswas, K. G. Schulz, J. LaRoche, and U. Riebesell, 2007, Effect of rising atmospheric carbon dioxide on the marine nitrogen fixer Trichodesmium, Global Biogeochem. Cycles, 21, GB2028, doi:10.1029/2006GB002898.

Bidle, K. D., L. Haramaty, J. Barcelos e Ramos and P. G. Falkowski, 2007, Viral activation and recruitment of metacaspases in the unicellular coccolithophorid, Emiliania Huxley,. Proc. Natl. Acad. Sct. USA 104:6049-6054.

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