Variations in the chemical lability of iron in estuarine, coastal and shelf waters and its implications for phytoplankton

Variations in the chemical lability of iron in estuarine, coastal and shelf waters and its implications for phytoplankton

The relationship between total and chemically labile Fe has been studied in estuarine, coastal and shelf waters of the Gulf of Maine, U.S.A. Measurements of the labile fraction of total Fe, defined by complexation with 8-hydroxyquinoline in 1 h, correlate with the availability of Fe to marine phytop...

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Veröffentlicht in:Marine chemistry 1991, Vol.32 (2), p.195-210
Hauptverfasser: Wells, M.L, Mayer, L.M
Format: Artikel
Sprache:eng
Schlagworte:
Brackish
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochemistry
Marine
Mineralogy
Silicates
Water geochemistry
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Zusammenfassung:The relationship between total and chemically labile Fe has been studied in estuarine, coastal and shelf waters of the Gulf of Maine, U.S.A. Measurements of the labile fraction of total Fe, defined by complexation with 8-hydroxyquinoline in 1 h, correlate with the availability of Fe to marine phytoplankton and therefore can be used to estimate Fe availability in seawater. The results show that the relative lability (=labile/total) of Fe in seawater varied both spatially and temporally from near-zero to 100%. Although particulate Fe (>0.45 μm) was generally less labile than dissolved Fe (
ISSN:0304-4203
1872-7581
DOI:10.1016/0304-4203(91)90038-X