TY - JOUR
T1 - Effects of dust deposition and river discharges on trace metal composition of Trichodesmium spp. in the tropical and subtropical North Atlantic Ocean
AU - Tovar-Sanchez, Antonio
AU - Sañudo-Wilhelmy, Sergio A.
AU - Kustka, Adam B.
AU - Agustí, Susana
AU - Dachs, Jordi
AU - Hutchins, David A.
AU - Capone, Douglas G.
AU - Duarte, Carlos M.
PY - 2006/7
Y1 - 2006/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33746887034&partnerID=8YFLogxK
U2 - 10.4319/lo.2006.51.4.1755
DO - 10.4319/lo.2006.51.4.1755
M3 - Article
AN - SCOPUS:33746887034
SN - 0024-3590
VL - 51
SP - 1755
EP - 1761
JO - Limnology and Oceanography
JF - Limnology and Oceanography
IS - 4
ER -