Articles | Volume 12, issue 4
https://doi.org/10.5194/bg-12-1237-2015
https://doi.org/10.5194/bg-12-1237-2015
Research article
 | 
26 Feb 2015
Research article |  | 26 Feb 2015

Vertical partitioning of phosphate uptake among picoplankton groups in the low Pi Mediterranean Sea

A. Talarmin, F. Van Wambeke, P. Lebaron, and T. Moutin

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Short summary
Along a transect in the warm nutrient-depleted Mediterranean Sea, we found that microorganisms shared phosphate resources by using different uptake strategies. Heterotrophic prokaryotes dominated phosphate uptake in the upper layers while cyanobacteria dominated uptake fluxes around the deep chlorophyll maximum depth. Synechococcus seemed well equipped to respond to pulses of phosphate, whereas Prochlorococcus and heterotrophs were more adapted to very low concentrations.
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