Aquatic Sciences Meeting, Albuquerque 2001

PC13 Phytoplankton: Trace Metals and Biochemistry

Date: Thursday, February 15, 2001

Location: Southwest Hall

Darrow, B, P, University of South Florida, St. Petersburg, USA, bdarrow@seas.marine.usf.edu

Lenes, J, M, University of South Florida, St. Petersburg, USA, lenes@seas.marine.usf.edu

Cattrall, C, , University of South Florida, St. Petersburg, USA, chris@monty.marine.usf.edu

Callahan, M, , University of South Florida, St. Petersburg, USA, callahan@seas.marine.usf.edu

Milroy, S, P, University of South Florida, St. Petersburg, USA, smilroy@seas.marine.usf.edu

Byrne, R, H, University of South Florida, St. Petersburg, USA, byrne@seas.marine.usf.edu

Prospero, J, M, University of Miami, Miami, USA, jprospero@rsmas.miami.edu

Walsh, J, J, University of South Florida, St. Petersburg, USA, jwalsh@seas.marine.usf.edu

SURFACE IRON CONCENTRATIONS ON THE WEST FLORIDA SHELF

Iron (Fe) has been proposed as an important trace metal in controlling primary production and nutrient cycles of oceanic ecosystems. Due to difficulties with sampling and quantifying dissolved Fe-stocks in marine systems without subsequent contamination, however, accurate portrayal of fluctuations in surface Fe in the oligotrophic West Florida shelf ecosystem has not been previously explored. As part of the ECOHAB Florida field studies, surface Fe was measured using a spectrophotometric method, employing a 10-m pathlength liquid core waveguide to increase sensitivity. In general, surface Fe concentrations ranged from less than 0.1 nmol kg-1 to 0.5 nmol kg-1 with order of magnitude increases following significant events of Saharan dust deposition.

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Aquatic Sciences Meeting, Albuquerque 2001

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