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Pregled bibliografske jedinice broj: 1045564

Electrochemical evaluation of iron-binding ligands along the Australian GEOTRACES southwestern Pacific section (GP13)

Cabanes, J.E. Damien; Norman, Louiza; Bowie, R. Andrew; Strmečki, Slađana; Hassler, S. Christel
Electrochemical evaluation of iron-binding ligands along the Australian GEOTRACES southwestern Pacific section (GP13) // Marine chemistry, 219 (2020), 103736, 11 doi:10.1016/j.marchem.2019.103736 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 1045564 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Electrochemical evaluation of iron-binding ligands along the Australian GEOTRACES southwestern Pacific section (GP13)

Autori
Cabanes, J.E. Damien ; Norman, Louiza ; Bowie, R. Andrew ; Strmečki, Slađana ; Hassler, S. Christel

Izvornik
Marine chemistry (0304-4203) 219 (2020); 103736, 11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Iron ; Organic speciation ; Humic substances ; Polymers ; Phytoplankton ; Southwestern Pacific Ocean

Sažetak
In this work, we performed electrochemical investigations of Fe-binding ligands in water samples collected in autumn 2011 along the Australian GEOTRACES southwestern Pacific section (GP13, between 153°E and 170°W longitude along the 30°S line East of Australia, 0-1000 m depth). We determined the capacity of the bulk organic ligands to complex Fe using competitive ligand exchange-adsorptive cathodic stripping voltammetry (CLEAdCSV) with salicylaldoxime as the competing ligand. Two categories of organic ligands, humic substances (HSlike) and catalytically active polymers (Cat. P) were electrochemically quantified in order to better define the bulk of Fe-binding ligands. Finally, Fe speciation results have been linked to oceanographic data, phytoplankton biomass, and two groups of cyanobacteria (Prochlorococcus and Synechococcus) which are prominent members of the phototrophic community in the study region. Across the section, higher total ligand concentrations over dissolved Fe concentrations were observed, as well as the predominance of “weak” Fe-binding ligands (log K’Fe’L < 12). Highest “excess ligands” were mostly concentrated in the upper layer of the water column, suggesting a direct link with biological activity. None of the two groups of organic ligands measured (HS-like and Cat. P) accounted for the bulk of the total Fe- binding ligands concentration, hindering a better characterization of the nature of in- situ Fe-binding ligands. Cat. P concentrations showed statistically significant positive correlations with all biomarker pigments and the abundance of Prochlorococcus, suggesting that this material, resembling polysaccharides, could be a good parameter to probe organic compounds from specific biological origin. Amongst the biological parameters, only Prochlorococcus was related to Fe’ concentrations

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti



POVEZANOST RADA

Projekti:
HRZZ-IP-2013-11-8607 - Utjecaj okolišnog stresa na pojavnost i međudjelovanje biološki važnih organskih molekula i mikronutrijenata u morskom ekosustavu (AMBIOMERES) (Gašparović, Blaženka, HRZZ - 2013-11) ( CroRIS)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Slađana Strmečki Kos (autor)

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com doi.org

Citiraj ovu publikaciju:

Cabanes, J.E. Damien; Norman, Louiza; Bowie, R. Andrew; Strmečki, Slađana; Hassler, S. Christel
Electrochemical evaluation of iron-binding ligands along the Australian GEOTRACES southwestern Pacific section (GP13) // Marine chemistry, 219 (2020), 103736, 11 doi:10.1016/j.marchem.2019.103736 (međunarodna recenzija, članak, znanstveni)
Cabanes, J., Norman, L., Bowie, R., Strmečki, S. & Hassler, S. (2020) Electrochemical evaluation of iron-binding ligands along the Australian GEOTRACES southwestern Pacific section (GP13). Marine chemistry, 219, 103736, 11 doi:10.1016/j.marchem.2019.103736.
@article{article, author = {Cabanes, J.E. Damien and Norman, Louiza and Bowie, R. Andrew and Strme\v{c}ki, Sla\djana and Hassler, S. Christel}, year = {2020}, pages = {11}, DOI = {10.1016/j.marchem.2019.103736}, chapter = {103736}, keywords = {Iron, Organic speciation, Humic substances, Polymers, Phytoplankton, Southwestern Pacific Ocean}, journal = {Marine chemistry}, doi = {10.1016/j.marchem.2019.103736}, volume = {219}, issn = {0304-4203}, title = {Electrochemical evaluation of iron-binding ligands along the Australian GEOTRACES southwestern Pacific section (GP13)}, keyword = {Iron, Organic speciation, Humic substances, Polymers, Phytoplankton, Southwestern Pacific Ocean}, chapternumber = {103736} }
@article{article, author = {Cabanes, J.E. Damien and Norman, Louiza and Bowie, R. Andrew and Strme\v{c}ki, Sla\djana and Hassler, S. Christel}, year = {2020}, pages = {11}, DOI = {10.1016/j.marchem.2019.103736}, chapter = {103736}, keywords = {Iron, Organic speciation, Humic substances, Polymers, Phytoplankton, Southwestern Pacific Ocean}, journal = {Marine chemistry}, doi = {10.1016/j.marchem.2019.103736}, volume = {219}, issn = {0304-4203}, title = {Electrochemical evaluation of iron-binding ligands along the Australian GEOTRACES southwestern Pacific section (GP13)}, keyword = {Iron, Organic speciation, Humic substances, Polymers, Phytoplankton, Southwestern Pacific Ocean}, chapternumber = {103736} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus

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