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| Fourquez, M.; Obernosterer, I.; Davies, D. M.; Trull, T. W.; Blain, S.. |
| Iron (Fe) uptake by the microbial community and the contribution of three different size fractions was determined during spring phytoplankton blooms in the naturally Fe-fertilized area off the Kerguelen Islands (KEOPS2). Total Fe uptake in surface waters was on average 34 +/- 6 pmol Fe L-1 d(-1), and microplankton (>25 mu m size fraction; 40-69%) and pico-nanoplankton (0.8-25 mu m size fraction; 29-59 %) were the main contributors. The contribution of heterotrophic bacteria (0.2-0.8 mu m size fraction) to total Fe uptake was low at all stations (1-2 %). Iron uptake rates normalized to carbon biomass were highest for pico-nanoplankton above the Kerguelen Plateau and for microplankton in the downstream plume. We also investigated the potential competition... |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00295/40598/39535.pdf |
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