Iron limitation across chlorophyll gradients in the southern Drake Passage: Phytoplankton responses to iron addition and photosynthetic indicators of iron stress

By B. Hopkinson, B. Greg Mitchell, R. Reynolds, Haili Wang, K. Selph, C. Measures, C. D. Hewes, O. Holm‐Hansen, K. Barbeau. 2007

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Iron‐light interactions differ in Southern Ocean phytoplankton (2012, background): “…efficiencies (approximated from the initial slope of the photosynthesis– irradiance relationship, aB), and the chlorophyll-to-carbon ratio (h), suggesting that iron-replete cells can utilize the light they intercept to assimilate CO2 more effectively (Hopkinson et al. 2007; Hiscock et al. 2008).”
Regional impacts of iron-light colimitation in a global biogeochemical model (2009, background): “In particular, Hopkinson et al. (2007) showed that changes in αchl between naturally iron-rich shelf and iron-poor open-ocean waters had no clear relationship to iron availability.”
The spatial structure of Antarctic biodiversity (2014, background): “The principal iron supply over timescales of phytoplankton growth and physiological responses is not in dust aerosols, as originally assumed (Wagener et al. 2008), but through dissolved iron being mobilized into the water during contact with sediments and the shelf break (Hopkinson et al. 2007).”