Changes in Phosphorus Biogeochemistry Along an Estuarine Salinity Gradient: The Iron Conveyer Belt

Changes in Phosphorus Biogeochemistry Along an Estuarine Salinity Gradient: The Iron Conveyer Belt

We used sequential extractions to quantify different forms of particulate phosphorus (PP) in sediments along the salinity gradient of the Patuxent River estuary. About 50-90% of the PP was phosphate bound to iron oxides (Fe-P), and 8-30% was organic P (org-P). Loosely sorbed phosphate (sorb-P), detr...

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Veröffentlicht in:Limnology and oceanography 2008-01, Vol.53 (1), p.172-184
Hauptverfasser: Jordan, Thomas E., Cornwell, Jeffrey C., Boynton, Walter R., Anderson, Jon T.
Format: Artikel
Sprache:eng
Schlagworte:
Brackish
Estuaries
Fresh water
Marine
Phosphates
Phosphorus
Phosphorus cycle
Salinity
Sediments
Sulfides
Suspended solids
Watersheds
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Zusammenfassung:We used sequential extractions to quantify different forms of particulate phosphorus (PP) in sediments along the salinity gradient of the Patuxent River estuary. About 50-90% of the PP was phosphate bound to iron oxides (Fe-P), and 8-30% was organic P (org-P). Loosely sorbed phosphate (sorb-P), detrital apatite, and authigenic plus biogenic apatite each made up 16 (the Redfield ratio) and ranged up to >700, while at the saline end of the gradient the ratio was generally
ISSN:0024-3590
1939-5590
DOI:10.4319/lo.2008.53.1.0172