Responses of marine phytoplankton in iron enrichment experiments in the northern North Sea and northeast Atlantic Ocean

Short-term iron enrichment experiments were carried out with samples collected in areas with different phytoplankton activity in the northern North Sea and northeast Atlantic Ocean in the summer of 1993. The research area was dominated by high numbers of pico-phytoplankton, up to 70,000 ml−1. Maximu...

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Bibliographic Details
Published in:Marine Chemistry
Main Authors: Timmermans, Klaas R., Gledhill, Martha, Nolting, Rob F., Veldhuis, Marcel J.W., Baar, Hein J.W. de, Berg, Constant M.G. van den
Format: Article in Journal/Newspaper
Language:English
Published: 1998
Subjects:
Iron enrichment experiments
Marine phytoplankton
North Sea
Northeast Atlantic
Online Access:https://hdl.handle.net/11370/7066466b-a5ea-4c61-824a-f44d63dca173
https://research.rug.nl/en/publications/7066466b-a5ea-4c61-824a-f44d63dca173
https://doi.org/10.1016/S0304-4203(97)00110-2
https://pure.rug.nl/ws/files/10740669/1998MarChemTimmermans.pdf
Description
Summary:Short-term iron enrichment experiments were carried out with samples collected in areas with different phytoplankton activity in the northern North Sea and northeast Atlantic Ocean in the summer of 1993. The research area was dominated by high numbers of pico-phytoplankton, up to 70,000 ml−1. Maximum chlorophyll a concentrations varied from about 1.0 μg l−1 in a high-reflectance zone (caused by loose coccoliths, remnants from a bloom of Emiliania huxleyi) and about 3.5 μg l−1 in a zone in which the phytoplankton were growing, to about 0.5 μg l−1 in the northeast Atlantic Ocean. From the high-reflectance zone to the northeast Atlantic Ocean, nitrate concentrations increased from 0.5 μM to 6.0 μM. Concentrations of reactive iron in surface water showed an opposite trend and decreased from about 2.6 nM in the high-reflectance zone to

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