Articles | Volume 12, issue 6
Biogeosciences, 12, 1893–1906, 2015
https://doi.org/10.5194/bg-12-1893-2015

Special issue: KEOPS2: Kerguelen Ocean and Plateau Study 2

Biogeosciences, 12, 1893–1906, 2015
https://doi.org/10.5194/bg-12-1893-2015
Research article
23 Mar 2015
Research article | 23 Mar 2015

Microbial iron uptake in the naturally fertilized waters in the vicinity of the Kerguelen Islands: phytoplankton–bacteria interactions

M. Fourquez et al.

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Cited articles

Allen, A. E., Laroche, J., Maheswari, U., Lommer, M., Schauer, N., Lopez, P. J., Finazzi, G., Fernie, A. R., and Bowler, C.: Whole-cell response of the pennate diatom Phaeodactylum tricornutum to iron starvation, P. Natl. Acad. Sci. USA, 105, 10438–10443, https://doi.org/10.1073/pnas.0711370105, 2008.
Amin, S. A., Green, D. H., Hart, M. C., Küpper, F. C., Sunda, W. G., Carrano, C. J., and Ku, F. C.: Photolysis of iron – siderophore chelates promotes bacterial – algal mutualism, P. Natl. Acad. Sci. USA, 106, 17071–17076, https://doi.org/10.1073/pnas.0905512106, 2009.
Armstrong, E., Granger, J., Mann, E. L., and Price, N. M.: Outer-membrane siderophore receptors of heterotrophic oceanic bacteria, Limnol. Oceanogr., 49, 579–587, https://doi.org/10.4319/lo.2004.49.2.0579, 2004.
Arrigo, K. R.: Molecular diversity and ecology of microbial plankton, Nature, 437, 343–348, https://doi.org/10.1038/nature04158, 2005.
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In this manuscript, we present the results of iron uptake measured in the naturally iron-fertilized area during the Kerguelen Ocean and Plateau compared Study 2 cruise (KEOPS2). Iron uptake by bulk community and several size fractions (microplankton, pico-nanoplankton and bacteria) are presented, compared and discussed in the present paper. This work also presents first investigations on the potential competition between bacteria and phytoplankton for access to iron.
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