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dc.contributor.authorLindemann, Christian
dc.contributor.authorFiksen, Øyvind
dc.contributor.authorAndersen, Ken Haste
dc.contributor.authorAksnes, Dag Lorents
dc.PublishedLindemann C, Fiksen Ø, Andersen KH, Aksnes DL. Scaling laws in phytoplankton nutrient uptake affinity. Frontiers in Marine Science. 2016;3:26eng
dc.description.abstractNutrient uptake affinity affects the competitive ability of microbial organisms at low nutrient concentrations. From the theory of diffusion limitation it follows that uptake affinity scales linearly with the cell radius. This is in conflict with some observations suggesting that uptake affinity scales to a quantity that is closer to the square of the radius, i.e., to cell surface area. We show that this apparent conflict can be resolved by nutrient uptake theory. Pure diffusion limitation assumes that the cell is a perfect sink which means that it is able to absorb all encountered nutrients instantaneously. Here, we provide empirical evidence that the perfect sink strategy is not common in phytoplankton. Although, small cells are indeed favored by a large surface to volume ratio, we show that they are punished by higher relative investment cost in order to fully benefit from the larger surface to volume ratio. We show that there are two reasons for this. First, because the small cells need a higher transporter density (p) in order to maximize their affinity, and second because the relative cost of a transporter is higher for a small than for a large cell. We suggest, that this might explain why observed uptake affinities do not scale linearly with the cell radius.en_US
dc.rightsAttribution CC BYeng
dc.subjectnutrient uptakeeng
dc.subjectallometric scalingeng
dc.subjectmolecular diffusioneng
dc.titleScaling laws in phytoplankton nutrient uptake affinityen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2016 The Author(s)en_US
dc.source.journalFrontiers in Marine Science

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