Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support

Effects of Dust Deposition and River Discharges on Trace Metal Composition of Trichodesmium spp. in the Tropical and Subtropical North Atlantic Ocean

Antonio Tovar-Sanchez, Sergio A. Sañudo-Wilhelmy, Adam B. Kustka, Susana Agustí, Jordi Dachs, David A. Hutchins, Douglas G. Capone and Carlos M. Duarte
Limnology and Oceanography
Vol. 51, No. 4 (Jul., 2006), pp. 1755-1761
Stable URL: http://www.jstor.org/stable/3841149
Page Count: 7
  • More info
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Effects of Dust Deposition and River Discharges on Trace Metal Composition of Trichodesmium spp. in the Tropical and Subtropical North Atlantic Ocean
Preview not available

Abstract

We present the elemental composition (Al, Cd, Co, Cu, Fe, Mn, Mo, Ni, V, Zn, and P) of field-collected Trichodesmium populations. To distinguish the effects of river discharges (Amazon and Niger Rivers) and Saharan dust deposition on metal concentrations in the colonies, samples were collected both in the western (February 2001, July-August 2001, and April-May 2003) and eastern (May-June 2003) basins of the North Atlantic. Metal composition (medians normalized to P) in Trichodesmium ranged from $0.011 mmol mol^{-1}$ for Co to $39 mmol mol^{-1}$ for Fe and varied over an order of magnitude among different locations. A comparison of metal ratios measured in the Trichodesmium colonies with ratios reported for the potential sources suggests that the most important sources of trace metals to the tropical and subtropical Atlantic during our sampling were the Amazon and Niger Rivers, rather than dust deposition from the Sahara.

Page Thumbnails

  • Thumbnail: Page 
1755
    1755
  • Thumbnail: Page 
1756
    1756
  • Thumbnail: Page 
1757
    1757
  • Thumbnail: Page 
1758
    1758
  • Thumbnail: Page 
1759
    1759
  • Thumbnail: Page 
1760
    1760
  • Thumbnail: Page 
1761
    1761