Title :

In situ measurements of micronutrient dynamics in open seawater show that complex dissociation rates may limit diatom growth

Author(s) :

Baeyens, Willy [Auteur]
Vrije Universiteit Brussel [Bruxelles] [VUB]
Gao, Yue [Auteur]
Vrije Universiteit Brussel [Bruxelles] [VUB]
Davison, William [Auteur]
Lancaster University
Galceran, Josep [Auteur]
Universitat de Lleida
Leermakers, Martine [Auteur]

Puy, Jaume [Auteur]
Universitat de Lleida
Superville, Pierre-Jean [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Beguery, Laurent [Auteur]
Division technique INSU/SDU [DTI]

Journal title :

Scientific Reports

Volume number :

8

Pages :

16125-16125

Publication date :

2018-12

HAL domain(s) :

Chimie/Chimie théorique et/ou physique

English abstract : [en]

In this first in situ study of the dynamic availability of phytoplankton micronutrients, a SeaExplorer glider was combined with Diffusive Gradients in Thin Films and deployed in the Mediterranean Sea. On the basis of their ...
Show more >In this first in situ study of the dynamic availability of phytoplankton micronutrients, a SeaExplorer glider was combined with Diffusive Gradients in Thin Films and deployed in the Mediterranean Sea. On the basis of their labile metal complex pools, we discovered that Fe and Co can be potentially limiting and Cu co-limiting to diatom growth, contrary to the generally accepted view that phosphorus (phosphate) is the growth limiting element in the Mediterranean Sea. For flagellates and picoplankton, phosphorus remains the main element limiting growth. Our in situ measurements showed that organic complexes of Fe and Cu (>98% of total dissolved concentration), dissociate slower than inorganic complexes of Co, Cd and Ni (>99% of total dissolved concentration being free ions and inorganic complexes). This strengthens the potential growth limiting effect of Fe and Cu versus phosphate, which is present as a free ion and, thus, directly available for plankton.Show less >

Language :

Anglais

Audience :

Non spécifiée

Popular science :

Non

Administrative institution(s) :

CNRS
ENSCL
Université de Lille

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Research team(s) :

Physicochimie de l’Environnement (PCE)

Submission date :

2021-11-16T08:23:26Z
2024-02-14T08:35:52Z