The University of Southampton
University of Southampton Institutional Repository

Iron limitation of the postbloom phytoplankton communities in the Iceland Basin

Nielsdóttir, Maria C., Moore, Christopher Mark, Sanders, Richard, Hinz, Daria J. and Achterberg, Eric P. (2009) Iron limitation of the postbloom phytoplankton communities in the Iceland Basin Global Biogeochemical Cycles, 23, GB3001. (doi:10.1029/2008GB003410).

Record type: Article


Measurements performed on a cruise within the central Iceland Basin in the high-latitude (>55°N) North Atlantic Ocean during late July to early September 2007 indicated that the concentration of dissolved iron (dFe) in surface waters was very low, with an average of 0.093 (<0.010–0.218, n = 43) nM, while nitrate concentrations ranged from 2 to 5 ?M and in situ chlorophyll concentrations ranged from 0.2 to 0.4 mg m?3. In vitro iron addition experiments demonstrated increased photosynthetic efficiencies (Fv/Fm) and enhanced chlorophyll accumulation in treatments amended with iron when compared to controls. Enhanced net growth rates for a number of phytoplankton taxa including the coccolithophore Emiliania huxleyi were also observed following iron addition. These results provide strong evidence that iron limitation within the postspring bloom phytoplankton community contributes to the observed residual macronutrient pool during summer. Low atmospheric iron supply and suboptimal Fe:N ratios in winter overturned deep water are suggested to result in the formation of this seasonal high-nutrient, low-chlorophyll (HNLC) condition, representing an inefficiency of the biological (soft tissue) carbon pump in the region.

Full text not available from this repository.

More information

Published date: 1 July 2009
Organisations: Ocean and Earth Science, National Oceanography Centre,Southampton


Local EPrints ID: 67453
ISSN: 0886-6236
PURE UUID: e3599322-9525-4ef9-b281-15c50062cc5b

Catalogue record

Date deposited: 18 Aug 2009
Last modified: 19 Jul 2017 00:19

Export record



Author: Maria C. Nielsdóttir
Author: Richard Sanders
Author: Daria J. Hinz

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.