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Publication:
Evidence for the production of copper-complexing ligands by marine phytoplankton in the subarctic northeast Pacific

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cris.virtual.author-orcid0000-0002-9091-8936
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cris.virtualsource.author-orcid0765ec69-615c-4e86-acfb-58dca653ea56
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dc.contributor.authorNixon, Richard L.
dc.contributor.authorPeña, M. Angelica
dc.contributor.authorTaves, Robyn
dc.contributor.authorJanssen, David James
dc.contributor.authorCullen, Jay T.
dc.contributor.authorRoss, Andrew R.S.
dc.date.accessioned2024-09-02T17:58:48Z
dc.date.available2024-09-02T17:58:48Z
dc.date.issued2021
dc.description.abstractThe availability and toxicity of copper (Cu) to marine phytoplankton involve complexation of Cu by dissolved organic ligands of uncertain origin and structure. As part of a GEOTRACES process study we used immobilized copper(II)-ion affinity chromatography (IMAC) to isolate and obtain information about the distribution and potential sources of Cu-complexing ligands along Line P in the subarctic northeast Pacific. Filtered seawater samples were collected from up to five stations during cruises in June 2016, June 2017, August 2017, and September 2018. Copper ligand concentrations were consistently higher at coastal station P4 than at other stations, particularly in surface waters. Ligand concentrations in the upper 40 m at station P26 increased between 2016 and 2018 following the 2014–2016 warming anomaly in the northeast Pacific, whereas an increase in ligand concentration from June to August 2017 coincided with seasonal increases in dissolved organic carbon (DOC) and net community production. At all stations, the depth of highest ligand concentration and maximum chlorophyll concentration coincided. A positive linear correlation between ligand and chlorophyll concentrations suggests that marine phytoplankton are a significant source of Cu ligands along Line P. The lower than expected ligand concentrations at station P26 in June 2016 are consistent with changes in phytoplankton ecology associated with the 2014–2016 warming anomaly. Comparing results from coastal and oceanic waters with those obtained previously in the Canadian Arctic suggests that terrigenous organic matter and marine humic substances contribute to the pool of Cu ligands captured by IMAC.
dc.description.sponsorshipInstitut für Geologie
dc.identifier.doi10.48350/159955
dc.identifier.publisherDOI10.1016/j.marchem.2021.104034
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/44034
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofMarine chemistry
dc.relation.issn0304-4203
dc.relation.organizationDCD5A442C08FE17DE0405C82790C4DE2
dc.relation.organizationDCD5A442C18FE17DE0405C82790C4DE2
dc.subject.ddc500 - Science::550 - Earth sciences & geology
dc.titleEvidence for the production of copper-complexing ligands by marine phytoplankton in the subarctic northeast Pacific
dc.typearticle
dspace.entity.typePublication
oaire.citation.issue104034
oaire.citation.startPage104034
oaire.citation.volume237
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oairecerif.author.affiliationInstitut für Geologie
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unibe.date.licenseChanged2021-10-27 07:40:37
unibe.description.ispublishedpub
unibe.eprints.legacyId159955
unibe.refereedTRUE
unibe.subtype.articlejournal

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