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dc.contributor.authorLodeiro, Pablo
dc.contributor.authorBrowning, Thomas J.
dc.contributor.authorAchterberg, Eric P.
dc.contributor.authorGuillou, Aurélie
dc.contributor.authorEl-Shahawi, Mohammad S.
dc.date.accessioned2021-04-21T06:35:50Z
dc.date.available2021-04-21T06:35:50Z
dc.date.issued2017-09-07
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/10459.1/71089
dc.description.abstractInputs of silver nanoparticles (AgNPs) to marine waters continue to increase yet mechanisms of AgNPs toxicity to marine phytoplankton are still not well resolved. This study reports a series of toxicity experiments on a representative coastal marine diatom species Chaetoceros curvisetus using the reference AgNP, NM-300K. Exposure to AgNPs resulted in photosynthetic impairment and loss of diatom biomass in proportion to the supplied AgNP dose. The underlying mechanism of toxicity was explored via comparing biological responses in parallel experiments. Diatom responses to AgNP, free Ag(I) species, and dialysis bag-retained AgNP treatments showed marked similarity, pointing towards a dominant role of Ag(I) species uptake, rather than NPs themselves, in inducing the toxic response. In marked contrast to previous studies, addition of the organic complexing agent cysteine (Cys) alongside Ag only marginally moderated toxicity, implying AgCys− complexes were bioavailable to this diatom species. A preliminary field experiment with a natural phytoplankton community in the southeast Atlantic Ocean showed no significant toxic response at a NM-300 K concentration that resulted in ~40% biomass loss in the culture studies, suggesting a modulating effect of natural seawaters on Ag toxicity.
dc.description.sponsorshipThis research was supported by a Marie Curie Intra European Fellowship within the 7th European Community Framework Programme (grant agreement number PIEF-GA-2012-329575). King Abdulaziz University is acknowledged for their support. T.J.B. was supported by a Marie Skłodowska-Curie Postdoctoral Intra European Fellowship (Grant number 658035).
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherSpringer Nature
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1038/s41598-017-11402-x
dc.relation.ispartofScientific Reports, 2017, vol. 7, num. 10777
dc.rightscc-by (c) Lodeiro, Pablo et al., 2017
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectEnvironmental impact
dc.subjectExperimental organisms
dc.subjectMarine chemistry
dc.subjectMetals
dc.titleMechanisms of silver nanoparticle toxicity to the coastal marine diatom Chaetoceros curvisetus
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2021-04-21T06:35:50Z
dc.identifier.idgrec031197
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1038/s41598-017-11402-x
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/658035/EU/OceanLiNES
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/329575


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cc-by (c) Lodeiro, Pablo et al., 2017
Except where otherwise noted, this item's license is described as cc-by (c) Lodeiro, Pablo et al., 2017