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dc.contributor.authorPavlov, Alexey K.
dc.contributor.authorSilyakova, Anna
dc.contributor.authorGranskog, Mats A.
dc.contributor.authorBellerby, Richard
dc.contributor.authorEngel, Anja
dc.contributor.authorSchulz, Kai G.
dc.contributor.authorBrussaard, Corina P. D.
dc.date.accessioned2022-08-31T09:32:20Z
dc.date.available2022-08-31T09:32:20Z
dc.date.issued2014-05-22
dc.description.abstractA large-scale multidisciplinary mesocosm experiment in an Arctic fjord (Kongsfjorden, Svalbard; 78°56.2′N) was used to study Arctic marine food webs and biogeochemical elements cycling at natural and elevated future carbon dioxide (CO2) levels. At the start of the experiment, marine-derived chromophoric dissolved organic matter (CDOM) dominated the CDOM pool. Thus, this experiment constituted a convenient case to study production of autochthonous CDOM, which is typically masked by high levels of CDOM of terrestrial origin in the Arctic Ocean proper. CDOM accumulated during the experiment in line with an increase in bacterial abundance; however, no response was observed to increased pCO<sub>2</sub> levels. Changes in CDOM absorption spectral slopes indicate that bacteria were most likely responsible for the observed CDOM dynamics. Distinct absorption peaks (at ~ 330 and ~ 360 nm) were likely associated with mycosporine-like amino acids (MAAs). Due to the experimental setup, MAAs were produced in absence of ultraviolet exposure providing evidence for MAAs to be considered as multipurpose metabolites rather than simple photoprotective compounds. We showed that a small increase in CDOM during the experiment made it a major contributor to total absorption in a range of photosynthetically active radiation (PAR, 400–700 nm) and, therefore, is important for spectral light availability and may be important for photosynthesis and phytoplankton groups composition in a rapidly changing Arctic marine ecosystem.en_US
dc.identifier.citationPavlov, Silyakova A, Granskog MA, Bellerby R, Engel A, Schulz KG, Brussaard CPD. Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels. Journal of Geophysical Research (JGR): Biogeosciences. 2014;119(6):1216-1230en_US
dc.identifier.cristinIDFRIDAID 1176440
dc.identifier.doi10.1002/2013JG002587
dc.identifier.issn2169-8953
dc.identifier.issn2169-8961
dc.identifier.urihttps://hdl.handle.net/10037/26502
dc.language.isoengen_US
dc.publisherAmerican Geophysical Union (AGU)en_US
dc.relation.journalJournal of Geophysical Research (JGR): Biogeosciences
dc.relation.projectIDNorges forskningsråd: 223259en_US
dc.relation.projectIDNorges forskningsråd: 184860en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/211384/EU/European Project on Ocean Acidification/EPOCA/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2014 AGUen_US
dc.titleMarine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levelsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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