Figure 5.

Relative scale of Fe availability established from phytoplankton uptake rates obtained for cultures (A) and natural assemblages (B). By converting experimental data to uptake-rate constants, and normalizing it further relative to Fe’, comparisons across organisms, Fe-substrates and environments are made possible (see text and Figure 4 for details). Different Fe-complexes are presented as different colors, while bar length represents variations among experiments, and circles denote no uptake. Abbreviations: Goe, goethite; DFB, desferrioxamine B; AB, Aerobactin; FC, ferrichrome; PYN, Porphyrin; MS, Monosaccharides; PS, Polysaccharides; AZ, Azotochelin; DPS, DNA binding protein from starved cells (iron storage proteins); CAT, Gallocatechin; DFE, desferrioxamine E. See Appendix for supporting data and Figure 3 for location descriptions. References: ^aShaked et al. (2005), ^bChen et al. (2008:1], ^cNodwell and Price (2001), ^dKustka et al. (2005), ^eMaldonado and Price (2001), ^fHassler and Schoemann (2009), ^gHassler et al. (2011b), ^hKranzler et al. (2011), ⁱMaldonado and Price (1999), ^jMaldonado et al. (2005), ^kWells et al. (1994); ^lLis and Shaked (2009), ^‡Lis and Shaked, unpublished.