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Open Access item Luxury uptake of aerosol iron by Trichodesmium in the western tropical North Atlantic

Authors:Chen, Ying
Tovar-Sánchez, Antonio
Siefert, Ronald L.
Sañudo-Wilhelmy, Sergio A.
Zhuang, Guoshun
Issue Date:2011
Publisher:American Geophysical Union
Citation:Geophysical Research Letteres 38 (2011)
Abstract:Dust transported from North Africa carries micronutrient iron (Fe) to the western tropical North Atlantic (WTNA) which may significantly influence the metabolism of the N2-fixing cyanobacteria, Trichodesmium. For the first time, we conducted shipboard incubation experiments using freshly collected aerosol, seawater, and Trichodesmium colonies. Trichodesmium assimilated significant amount of aerosol Fe up to 14 times higher than the control. The uptake amount increased proportionally to the P: Fe ratio that Trichodesmium initially contained and to the aerosol Fe added and leached to the incubation solution. Trichodesmium assimilated more aerosol Fe than needed for its maximum growth (0.14 d-1) demonstrating a high capacity of luxury uptake of Fe from the dust. Copyright 2011 by the American Geophysical Union.
URI:http://hdl.handle.net/10261/58639
Identifiers:doi: 10.1029/2011GL048972
issn: 0094-8276
Appears in Collections:(IMEDEA) Artículos

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