Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7698802 | Marine Chemistry | 2018 | 11 Pages |
Abstract
In good agreement with previous work, we find that biomass associated Fe/P ratios represent a good proxy for the absolute quantity of Fe-precipitates on diatom surfaces. Zn sorption to these surface-bound Fe-hydroxides can drive bulk biomass δ66Zn compositions up. On the other hand, the loss of heavy Zn from the experimental medium causes the biomass Î66Zn, if referred to the starting medium, to be biased in the other direction, towards more negative values. To avoid any such complications, likely to occur at high Fe or low buffer capacities, we conclude that diatoms cultured at low Fe are most likely to record the Î66Zn signatures of Zn uptake into the phytoplankton cell.
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Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Michael Köbberich, Derek Vance,