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dc.contributor.authorOfstad, Siri
dc.contributor.authorZamelczyk, Katarzyna
dc.contributor.authorKimoto, Katsunori
dc.contributor.authorChierici, Melissa
dc.contributor.authorFransson, Agneta
dc.contributor.authorRasmussen, Tine Lander
dc.date.accessioned2021-07-05T22:04:55Z
dc.date.available2021-07-05T22:04:55Z
dc.date.issued2021-04-28
dc.description.abstractPlanktonic calcifiers, the foraminiferal species <i>Neogloboquadrina pachyderma</i> and <i>Turborotalita quinqueloba</i>, and the thecosome pteropod <i>Limacina helicina</i> from plankton tows and surface sediments from the northern Barents Sea were studied to assess how shell density varies with depth habitat and ontogenetic processes. The shells were measured using X-ray microcomputed tomography (XMCT) scanning and compared to the physical and chemical properties of the water column including the carbonate chemistry and calcium carbonate saturation of calcite and aragonite. Both living <i>L. helicina</i> and <i>N. pachyderma</i> increased in shell density from the surface to 300 m water depth. <i>Turborotalita quinqueloba</i> increased in shell density to 150–200 m water depth. Deeper than 150 m, <i>T. quinqueloba</i> experienced a loss of density due to internal dissolution, possibly related to gametogenesis. The shell density of recently settled (dead) specimens of planktonic foraminifera from surface sediment samples was compared to the living fauna and showed a large range of dissolution states. This dissolution was not apparent from shell-surface texture, especially for <i>N. pachyderma</i>, which tended to be both thicker and denser than <i>T. quinqueloba</i>. Dissolution lowered the shell density while the thickness of the shell remained intact. <i>Limacina helicina</i> also increase in shell size with water depth and thicken the shell apex with growth. This study demonstrates that the living fauna in this specific area from the Barents Sea did not suffer from dissolution effects. Dissolution occurred after death and after settling on the sea floor. The study also shows that biomonitoring is important for the understanding of the natural variability in shell density of calcifying zooplankton.en_US
dc.identifier.citationOfstad S, Zamelczyk K, Kimoto K, Chierici M, Fransson A, Rasmussen TLR. Shell density of planktonic foraminifera and pteropod species Limacina helicina in the Barents Sea: Relation to ontogeny and water chemistry. PLOS ONE. 2021;16en_US
dc.identifier.cristinIDFRIDAID 1907524
dc.identifier.doi10.1371/journal.pone.0249178
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/10037/21744
dc.language.isoengen_US
dc.publisherPLoSen_US
dc.relation.ispartofOfstad, S. (2021). Arctic planktonic calcifiers in a changing ocean - A study on recent planktonic foraminifera and shelled pteropods in the Fram Strait-Barents Sea region. (Doctoral thesis). <a href=https://hdl.handle.net/10037/23247>https://hdl.handle.net/10037/23247</a>.
dc.relation.journalPLOS ONE
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.titleShell density of planktonic foraminifera and pteropod species Limacina helicina in the Barents Sea: Relation to ontogeny and water chemistryen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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