Iron cycle in oceans by Stéphane Blain, Alessandro Tagliabue

By Stéphane Blain, Alessandro Tagliabue

This booklet provides an up-to-the-minute view of iron biogeochemistry within the ocean. It encompasses the outline of iron speciation, the analytical tools used to degree the various iron types in seawater and the various iron biogeochemical versions.

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Extra resources for Iron cycle in oceans

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For iron [TIM 04]), and its Modeling Methods 41 simplicity made it attractive to large-scale models. Quota limitation takes a different standpoint and regulates growth by the internal iron quota (due to iron uptake) relative to a minimum quota that is fixed or which can vary depending on environmental conditions [FLY 99]. Quota models are more adept at representing how multiple nutrient interactions shape phytoplankton growth [FLY 10]. However, the trade-off is the requirement for explicitly modeling the biomass of each component of the quota, which can be computationally expensive.

Depending on the mathematical method used for the calculation, one or two classes of ligands are determined [WU 09]. 3. Iron complexation and speciation determination by the electrochemical method. 4. Mass spectrometry Induced coupled plasma mass spectrometry (ICP-MS) is used as a detection method for the determination of dissolved or particulate iron in seawater. This large and expensive equipment is not suitable for shipboard determination; however, multielemental analysis can be performed on the same sample.

4. Calibration curve (sigmoid) for a biosensor [BOY 07a] Although bioreporters measure the bioavailability of iron from the perspective of microorganisms, the issue of the representativeness of the cultivated microorganisms compared to the diversity of the organisms in a natural community is an important one. The use of a combination of different bioreporters may be the next step forward. e. molecules synthesized by microorganism) with an iron-complexing capacity to develop iron sensors. For example, DFOB was immobilized on mesoporous silica film.

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