The nitrogen cycle is fundamental to Earth’s biogeochemistry. Yet major quantitative uncertainties remain, particularly regarding the global oceanic nitrogen fixation rate. Continue reading Mapping Nitrogen Fixation? Follow the Hydrogen.
Category Archives: Nitrogen Fixation
Dutkiewicz, S., Ward, B. A., Scott, J. R., and Follows, M. J. (2014) Understanding predicted shifts in diazotroph biogeography using resource competition theory, Biogeosciences, 11, 5445-5461, doi: 10.5194/bg-11-5445-2014.
Moore, R.M., M. Kienast, M. Fraser, J. Cullen, C. Deutsch, S. Dutkiewicz, M.J. Follows, and C.J. Somes (2014), Substantial underestimation of nitrogen fixation suggested by hydrogen supersaturations in the Atlantic, Journal of Geophysical Research - Oceans , 119, 4340-4350, doi: 10.1002/2014JC010017.
Darwin goes to Ocean Sciences 2014
Leaving the cold of a New England February behind, the Darwin team will be in full attendance at this year’s Ocean Sciences conference taking place February 23-28 in Honolulu, Hawaii.
Publication
Ward, B.A., S. Dutkiewicz, C.M. Moore and M.J. Follows (2013), Iron, phosphorus, and nitrogen supply ratios define the biogeography of nitrogen fixation Limnology and Oceanography, vol. 58, pp. 2059, doi: 10.4319/lo.2013.58.6.2059
Publication
Monteiro, F. and M.J. Follows (2012), On nitrogen fixation and preferential remineralization of phosphorus. Geophys. Res. Lett., 39, L06607, doi: 10.1029/2012GL050897
Publication
Dutkiewicz, S., B. A. Ward, F. Monteiro, and M. J. Follows (2012), Interconnection of nitrogen fixers and iron in the Pacific Ocean: Theory and numerical simulations, Global Biogeochem. Cycles, 26, GB1012, doi: 10.1029/2011GB004039
Ecology of nitrogen fixers in the Pacific Ocean
Nitrogen is an essential component of all cells. It is used to make the amino acid building blocks of proteins, and is also required in the nucleic acids of DNA and RNA. Although nitrogen extremely abundant in the open ocean, it is mostly found in dissolved N2 molecules that cannot be used by most phytoplankton, who require nitrogen in its reduced, or “fixed” forms, such as nitrate or ammonium.
Continue reading Ecology of nitrogen fixers in the Pacific Ocean
Biogeographical controls on the marine nitrogen fixers
In this study, Fanny Monteiro, Stephanie Dutkiewicz and Mick Follows, interpret the environmental controls on the global ocean diazotroph biogeography in the context of a three-dimensional global model with a self-organizing phytoplankton community.
Continue reading Biogeographical controls on the marine nitrogen fixers
Publication
Monteiro, F., S. Dutkiewicz, and M.J. Follows (2011), Biogeographical controls on the marine nitrogen fixers, Global Biogeochemical Cycles, 25, GB2003, doi:10.1029/2010GB003902