Articles | Volume 15, issue 16
Biogeosciences, 15, 4973–4993, 2018
https://doi.org/10.5194/bg-15-4973-2018
Biogeosciences, 15, 4973–4993, 2018
https://doi.org/10.5194/bg-15-4973-2018
Research article
22 Aug 2018
Research article | 22 Aug 2018

Mechanisms of dissolved and labile particulate iron supply to shelf waters and phytoplankton blooms off South Georgia, Southern Ocean

Christian Schlosser et al.

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Cited articles

Atkinson, A.: Diets and feeding selectivity among the epipelagic copepod community near South Georgia in summer, Polar Biol., 14, 551–560, 1994. 
Atkinson, A., Whitehouse, M. J., Priddle, J., Cripps, G. C., Ward, P., and Brandon, M. A.: South Georgia, Antarctica: a productive, cold water, pelagic ecosystem, Mar. Ecol.-Prog. Ser., 216, 279–308, 2001. 
Berger, C. J. M., Lippiatt, S. M., Lawrence, M. G., and Bruland, K. W.: Application of a chemical leach technique for estimating labile particulate aluminum, iron, and manganese in the Columbia River plume and coastal waters off Oregon and Washington, J. Geophys. Res., 113, 1–16, 2008. 
Bonneville, S., Behrends, T., and Van Cappellen, P.: Solubility and dissimilatory reduction kinetics of iron(III) oxyhydroxides: A linear free energy relationship, Geochim. Cosmochim. Ac., 73, 5273–5282, 2009. 
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Iron (Fe) emanating from the South Georgia shelf system fuels large phytoplankton blooms downstream of the island. However, the actual supply mechanisms of Fe are unclear. We found that shelf-sediment-derived iron and iron released from Antarctic krill control the Fe distribution in the shelf waters around South Georgia. The majority of the Fe appears to be derived from recycling of Fe-enriched particles that are transported with the water masses into the bloom region.
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